1. Overview: The Powerline to Solution Line Migration Challenge
Engineers maintaining older Sinumerik 840D Powerline installations face a recurring dilemma: a legacy 1FT6 servo motor reaches end of life, and the only available replacement is a 1FK7 Compact series unit with EnDat encoder. Because the 1FK7 family was designed primarily for the Solution Line (SINAMICS S120) drive platform, the commissioning data set for the new motor exists in Solution Line format. The challenge is to map the Solution Line parameters back to Powerline (SIMODRIVE 611D) format so the existing 611D module can drive the new motor without migrating the entire control.
This reference documents the conversion path, the confirmed parameter mapping (611D 1104 = SINAMICS p323, as recorded in the source commissioning record), the encoder and temperature sensor interfaces, and the most common fault (parameter 1011 related) encountered during this migration. The case study uses a direct swap of 1FT6-024-6AK71-3AG0 to 1FK7022-5AK74-1HG0, with a 2048 pulses-per-revolution incremental encoder being replaced by a 512-step EnDat 2.1 absolute encoder and a KTY84 temperature sensor being replaced by a PT1000 sensor.
2. System Architecture: Powerline vs Solution Line
The Sinumerik 840D control platform spans two distinct drive generations that share the same NCK and PLC software layers but differ fundamentally on the drive side. Powerline systems use SIMODRIVE 611D digital converters built on 6SN11xx modules. Solution Line systems use SINAMICS S120 drive modules (6SL3xxx) controlled by a CU320 or CX32 control unit. Both generations use the same NCU 7x0.x hardware family, but the firmware stack, drive parameter numbering convention, and commissioning tool chain differ.
2.1 Drive Parameter Numbering
Powerline drives communicate with the NC via PROFIBUS-DP and use drive parameter numbers in the 1xxx (motor/data set), 2xxx (current/velocity), and 3xxx (mechanical/commutation) ranges with a four-digit decimal format. Solution Line drives use parameter numbers in the 0xxx (basic inverter), 1xxx (closed-loop control), 2xxx (power unit), and 3xxx (motor) ranges per the SINAMICS parameter convention, prefixed with a lower-case p (for setup parameters) or r (for read-only parameters), with optional sub-indices in square brackets.
The unit convention is normalized across SINAMICS (SI units throughout), but SIMODRIVE 611D uses internal scaling factors in some parameters. A motor current value of 1104 in 611D expressed in 0.01 A must be entered into p323 in 0.01 A rms (SINAMICS convention) depending on the firmware version. Always verify the unit before applying a migrated value.
2.2 Drive Module Identification
Powerline 611D modules carry 6SN11xx order numbers and have an integrated PROFIBUS-DP slave interface. SINAMICS S120 modules use 6SL3xxx order numbers and require a separate CU320 Control Unit (or CX32 for cross-link) for PROFIBUS or PROFINET communication. When backing up drive data from a Solution Line commissioning, the data set is stored in the SINAMICS parameter format. When applying that data set to a Powerline 611D module, each parameter must be re-entered into the corresponding 1xxx-format field manually or via a data set copy tool.
For a broader reference on drive parameter scaling principles, see the Rockwell Automation Drives Engineering Handbook for general guidance on unit conversion and scaling across platforms. Siemens-specific conversion is documented in the Siemens Industry Online Support portal under the SINUMERIK 840D sl Commissioning Manual.
3. Motor Migration: 1FT6 to 1FK7
The case documented here is a direct swap of a 1FT6-024-6AK71-3AG0 with a 1FK7022-5AK74-1HG0. Both are permanent-magnet synchronous servomotors, but they differ in the following technical aspects.
3.1 Mechanical Compatibility
The 1FT6024 has a 24 frame designation; the 1FK7022 has a 22 frame designation. The shaft diameters, key dimensions, and bolt-circle dimensions differ. A mechanical adapter sleeve, replacement coupling, or new gearbox may be required to maintain shaft alignment and to fit the existing mounting holes. Maximum permissible shaft runout is 0.03 mm measured at the coupling face.
3.2 Encoder Type
The 1FT6-024-6AK71-3AG0 ships with an incremental encoder of 2048 pulses per revolution. The 1FK7022-5AK74-1HG0 ships with an EnDat 2.1 absolute encoder. The 512 S/R resolution recorded in the source commissioning record indicates a low-resolution singleturn EnDat option. This change in encoder type is the root of the commissioning problem because the 611D drive must be configured to expect the EnDat protocol rather than the legacy incremental protocol. The drive's incremental TTL input stage cannot decode the EnDat data packets even if the pulse train appears similar.
3.3 Temperature Sensor
The 1FT6 used in this installation uses a KTY84 silicon temperature sensor (vendor: Infineon, formerly Siemens). The 1FK7 Compact uses a PT1000 platinum RTD sensor. The 611D drive has only one temperature input circuit, which can be configured in firmware for either sensor type. The configuration is typically controlled by parameter 1011 (sensor type) or by the motor data set selection. Mixing the two sensor types without reconfiguring the drive will produce false temperature readings.
3.4 Brake and Connector Pinout
The 1FK7022-5AK74-1HG0 holding brake (if fitted, per the -1 segment of the part number) uses a 24 V DC brake coil. The 1FT6 brake coil rating may differ; verify the connector pinout against the Siemens 1FK7 motor data sheet. The 1FK7 uses an M23 rotatable connector with 12 pins for power and signal. The 1FT6 used in this installation likely uses the older 17-pin military-style connector or a smaller M17 connector. A re-pinning harness is required.
4. Hardware Conversion Components
Three pieces of hardware are required to complete the motor swap without changing the 611D module.
- Motor signal cable with EnDat wiring (6FX2002 series) and correct connector gender for the 1FK7
- PT1000/KTY84 conversion socket (or adapter harness) that re-routes the temperature sensor signals to the 611D X2 terminal
- Mechanical adapter sleeve or coupling
4.1 Motor Signal Cable
Use a Siemens 6FX2002 motor signal cable rated for the 1FK7 power level. For incremental and EnDat encoders the cable part numbers differ. For an EnDat 2.1 absolute encoder, the correct cable family is 6FX2002-2CE00-... (or the 2CE0x variant depending on drag-chain rating and length). Verify the connector on the motor end: the 1FK7022-5AK74-1HG0 uses an M23 rotatable connector with 12 pins. Refer to the Siemens 6FX2002 catalog for the exact length and drag-chain rating.
4.2 PT1000/KTY84 Conversion Socket
The conversion socket rewires the temperature sensor pins to be compatible with the 611D drive's evaluation circuit. A typical adapter maps the 1FK7 connector to the 611D X2 terminal as shown below.
| 1FK7 Pin (M23) | 611D X2 Terminal | Signal | Function |
|---|---|---|---|
| X1.13 | X2.13 / T+ | PT1000 + | Temperature sensor high |
| X1.25 | X2.25 / T- | PT1000 - | Temperature sensor low |
| X1.6 | X1.6 | EnDat DATA + | Encoder data |
| X1.7 | X1.7 | EnDat DATA - | Encoder data inverted |
| X1.8 | X1.8 | EnDat CLOCK + | Encoder clock |
| X1.9 | X1.9 | EnDat CLOCK - | Encoder clock inverted |
| X1.1 / X1.2 | X1.1 / X1.2 | Brake + / - | Holding brake (24 V DC) |
The temperature sensor voltage is interpreted by the 611D analog front end and converted to a temperature value. With PT1000 selected, the drive expects a sensor resistance of 1 kΩ at 0 °C and 1.385 kΩ at 100 °C. With KTY84 selected, the drive expects a sensor voltage in the 0.5–4.5 V range at 1 mA bias current.
5. Drive Parameter Cross-Reference Framework
There is no single, publicly indexed document that maps every Powerline 611D drive parameter to its Solution Line SINAMICS equivalent. The mapping follows the SINAMICS S120/S150 List Manual parameter structure, where each Powerline parameter is renamed and renumbered based on function family. The general rules are summarized below.
- Powerline motor data parameters (1xxx range) map to SINAMICS motor data (1xxx and 3xxx ranges)
- Powerline current loop parameters (2xxx range) map to SINAMICS current controller (1xxx range, sub-indices)
- Powerline velocity loop parameters (2xxx range) map to SINAMICS speed controller (1xxx range, sub-indices)
- Powerline position loop and commutation parameters map to SINAMICS encoder and closed-loop control (2xxx range)
When copying parameters between platforms, the data set must include at minimum: motor pole pair count, motor EMF constant, motor winding resistance, motor winding inductance, motor torque constant, and motor temperature sensor type. These parameters are the most common source of cross-platform commissioning errors.
6. Confirmed Parameter Mapping
The following mapping is explicitly stated in the source commissioning record and is the only one confirmed for this specific motor swap. Other mappings must be derived from the SINAMICS S120 List Manual and the 611D parameter list (PJFE, PJLM, or PJLU, firmware-specific).
| Powerline 611D | Description | SINAMICS S120 | Unit | Notes |
|---|---|---|---|---|
| 1104 | Motor_Max_Current (M_max_Ist) | p323 [Mot I_max] | A rms | Maximum permissible motor current; both expressed in 0.01 A rms increments on recent firmware |
For all other motor data parameters, the engineer must identify the parameter by its name and verify the unit convention. The typical approach is to search the SINAMICS S120 List Manual for the parameter name (Mot I_max, Mot n_max, Mot M_max, Mot p pairs, Mot T_max, Mot R, Mot L, Mot kT, Mot kE) and then locate the equivalent field in the 611D parameter list.
7. Encoder Configuration on Powerline for EnDat Motors
The 611D drive supports EnDat 2.1 encoders when the firmware is at a compatible version. Earlier 611D universal firmware versions (3.x and earlier) only support incremental TTL and HTL encoders. The 6SN11xx-1Ax0x-0AA1 firmware version (or later) and the matching commissioning tool support EnDat 2.1.
7.1 Required Firmware for EnDat 2.1
For 1FK7 motors with EnDat 2.1 singleturn or multiturn encoders, the minimum 611D firmware version is 4.2 SP3 or later. Verify the firmware version of the installed 611D module by reading parameter r794 (firmware version) and comparing against the Siemens compatibility list in the SINUMERIK 840D sl Commissioning Manual. If the firmware is below 4.2 SP3, the 611D will not support the EnDat 2.1 protocol used by the 1FK7 encoder, and the drive will fault at first enable.
7.2 Encoder Configuration Parameter
The encoder type is selected via parameter 1011 (in older firmware) or 1017/1019 (in newer firmware). The available values vary by firmware.
| Value | Encoder Type | Firmware Support |
|---|---|---|
| 0 | Incremental TTL 5 V (2048 ppr) | All 611D versions |
| 1 | Incremental HTL 24 V | All 611D versions |
| 2 | SSI absolute | 4.0 and later |
| 3 | EnDat 2.1 absolute | 4.2 SP3 and later |
| 4 | EnDat 2.2 absolute | 4.3 and later |
| 5 | Resolver | 4.0 and later |
For a 1FK7022-5AK74-1HG0 with EnDat 2.1, set the encoder type to value 3. If the 611D firmware does not support EnDat 2.1, the only path is either a firmware upgrade (verified against the Siemens 840D compatibility list) or a full migration to Solution Line.
7.3 Encoder Resolution and Position Scaling
The 512 singleturn steps of the 1FK7022-5AK74-1HG0 encoder produce 512 discrete positions per shaft revolution. This is below the typical 2048 steps of the older 1FT6 incremental encoder, which means the position resolution is coarser. The 611D drive interpolates the EnDat signal to 4096 or 8192 internal increments per revolution (firmware-dependent), but the absolute position accuracy is limited by the 512-step resolution. For applications requiring higher position accuracy, a 2048-step EnDat 1FK7 variant should be selected.
8. Temperature Sensor Interface
The 611D drive has one motor temperature input on the X2 connector (pins 13 and 25). The input can be configured for KTY84 or PT1000 by parameter 1011 (sensor type) or by the motor data set selection. The firmware-specific meaning of parameter 1011 is summarized below.
| Firmware Version | Parameter 1011 Function | Valid Values |
|---|---|---|
| PJFE (3.x) | Encoder type | 0–5 (see Section 7.2) |
| PJLM (4.0–4.2) | Encoder type + sensor type (multi-bit) | Combined value |
| PJLU (4.3 and later) | Sensor type only; encoder type moved to 1017/1019 | 0 = KTY84, 1 = PT1000 |
This firmware-dependency is the source of much confusion during commissioning. When the source conversation refers to "the parameter 1011", the actual function of 1011 depends on the firmware version installed in the 611D module. Always read the active firmware version (r794) and consult the matching parameter list (PJFE, PJLM, or PJLU) before modifying 1011.
8.1 PT1000 vs KTY84 Evaluation Behavior
When a 1FK7 PT1000 sensor is connected but the drive is configured for KTY84, the drive applies the 1 mA bias current to the sensor and measures the voltage drop. The voltage-temperature relationship for a PT1000 at 1 mA is approximately 1 mV/Ω, so at 0 °C the drive reads 1.0 V (sensor = 1 kΩ). At 100 °C the drive reads 1.385 V. The KTY84 evaluation curve interprets 1.0 V as approximately 0 °C and 1.385 V as approximately 50 °C, so the drive under-reads the actual temperature. At higher temperatures (e.g., 150 °C, PT1000 = 1.575 kΩ → 1.575 V), the KTY84 curve reads it as approximately 90 °C, which is well below the actual. The drive may also trip on F-0300 at first power-up if the 1 mA bias current at the lower PT1000 resistance produces a voltage outside the KTY84 valid range.
The recommended procedure is to switch parameter 1011 to PT1000 mode in PJLU firmware, or set the sensor type sub-field in PJLM firmware, and verify the temperature reading in the commissioning screen against a calibrated reference (infrared thermometer at the motor housing).
9. Commissioning Procedure
Follow the sequence below to commission a 1FK7 motor on a 611D module using a Solution Line commissioning backup.
9.1 Prerequisites
- 611D firmware version 4.2 SP3 or later with EnDat 2.1 support
- 24 V DC logic supply stable to within ±5%
- NCU 7x0 with PLC and HMI software compatible with 1FK7 motor files
- Solution Line commissioning backup of the 1FK7022-5AK74-1HG0 motor data set (stored on CF card or PG)
- Motor signal cable 6FX2002-2CE00-... with EnDat wiring
- PT1000/KTY84 conversion socket (if required)
- Mechanical adapter sleeve or coupling
- Calibrated infrared thermometer for temperature verification
- Dial indicator for shaft alignment verification
9.2 Step-by-Step Procedure
- Power down the 840D control and the 611D drive line-up. Lock out the main disconnect per OSHA 1910.147. Verify zero energy with a voltage tester at the DC bus.
- Replace the 1FT6 motor with the 1FK7. Mount mechanically. Verify shaft alignment with a dial indicator. Maximum runout 0.03 mm. Verify axial preload per the motor data sheet.
- Connect the motor power cable (1FK7 uses a 1.5 mm² cross-section per phase for the 22-frame size). Torque the cable glands to 0.5 Nm.
- Connect the motor signal cable. Install the PT1000/KTY84 conversion socket or adapter harness at the 611D X2 terminal.
- Power up the control (24 V logic only). Verify NCK and PLC boot without errors. Check the HMI boot screen for any 611D module fault or alarm.
- Navigate to Commissioning → Drives → Drive Data → Motor Data. Enter the motor data set manually from the Solution Line commissioning backup, parameter by parameter.
- Set parameter 1104 (Motor_Max_Current) to the p323 value from the backup. Verify the unit (A rms). Example: if p323 = 450, enter 1104 = 450 (representing 4.50 A rms).
- Set the encoder type to EnDat 2.1 (value 3 or 4 depending on firmware) per the table in Section 7.2.
- Set the temperature sensor to PT1000 per Section 8.
- Save the data set to the FEPROM of the 611D module. Confirm the save with the FEPROM OK message on the HMI.
- Power down and power up the drive stage. Observe the first commissioning run.
- If the drive accepts the data set, run the motor identification routine (p1910 equivalent on 611D, accessed via parameter 1100 in commissioning mode). The motor will rotate 90° electrically with low current to determine the commutation offset. Do not load the shaft during this test. The motor must be free to rotate.
- After identification, save the data set again and power cycle.
- Run the basic functional tests: manual jog at low speed (e.g., 100 mm/min), reference traverse, spindle test (if applicable).
- Verify the temperature reading on the HMI against a calibrated reference.
- Run the following error test at 10%, 50%, and 100% of programmed feedrate.
9.3 Commissioning Flowchart
10. Fault Diagnosis: Parameter 1011 and Related Errors
The reported symptom in the source conversation is a drive fault during commissioning, even though the encoder counter is observed to increment when the shaft is rotated manually. This combination of symptoms (counter visible, drive faults) typically points to one of five root causes. Diagnose each in sequence.
10.1 Encoder Type Mismatch
If the drive is configured for incremental TTL and the motor delivers EnDat 2.1, the drive will detect the clock signal but cannot decode the data packets. The encoder counter may appear to increment on the HMI screen because the drive is reading the raw pulse count, but the EnDat protocol is not being processed. The drive trips on F-0115 (encoder fault) or F-0120 (encoder initialization).
Resolution: Set parameter 1011 (encoder type) to EnDat 2.1 (value 3 or 4).
10.2 EnDat Protocol Version Mismatch
If the drive is configured for EnDat 2.1 but the motor delivers EnDat 2.2, or if the 611D firmware only supports EnDat 2.1 and the motor delivers 2.2, the drive trips on F-0118 (encoder type incompatible). The 1FK7022-5AK74-1HG0 is typically EnDat 2.1, but the -HG0 variant suffix must be checked against the Siemens 1FK7 motor data sheet for the exact encoder variant.
Resolution: Verify the encoder variant from the 1FK7 motor data sheet, then set parameter 1011 to the matching EnDat version.
10.3 Temperature Sensor Type Mismatch
If the temperature sensor is left at KTY84 with a PT1000 connected, the drive trips on F-0300 (motor overtemperature) at first power-up, or it returns an alarm whose message text references parameter 1011. The drive's under-read of the actual temperature (per Section 8.1) means F-0300 is unlikely at cold start, but the missing protection at higher temperatures is the larger safety concern.
Resolution: Set parameter 1011 (sensor type) to PT1000.
10.4 Incorrect Commutation Offset
If the motor data set is incomplete or the pole pair count is wrong, the motor may rotate uncommanded during the first enable and trip on F-0250 (following error) or F-0210 (overcurrent). The encoder counter is correct, but the commutation angle is wrong, so the current vector is applied at the wrong rotor position.
Resolution: Run the motor identification routine (p1910 equivalent) to recalculate the commutation offset. The motor must be free to rotate 90° electrically during this test.
10.5 Incompatible Motor Data Set
If the motor pole pair count, winding resistance, or inductance differs from the data set, the current controller cannot regulate the motor. The drive trips on F-0210 or F-0250. The data set from the Solution Line commissioning must be re-entered into the 611D format manually.
Resolution: Compare the 1FK7022-5AK74-1HG0 motor data sheet values with the 611D data set and verify all motor electrical parameters: pole pair count (p314/1116), EMF constant (p315/1118), winding resistance (p300/p350/1110), and winding inductance (p351/1112).
10.6 Fault Diagnosis Matrix
| Symptom | Fault Code | Root Cause | Parameter to Check | Resolution |
|---|---|---|---|---|
| Encoder counts but drive faults at first enable | F-0115 / F-0120 | Encoder type mismatch (incremental vs EnDat) | 1011 (firmware-dependent) | Set to EnDat 2.1 |
| Encoder type incompatible alarm | F-0118 | EnDat version mismatch (2.1 vs 2.2) | 1011 | Match EnDat version to motor data sheet |
| Motor overtemperature at first power-up | F-0300 | Sensor type mismatch (PT1000 read as KTY84) | 1011 (sensor field) | Set to PT1000 |
| Motor rotates uncommanded | F-0210 / F-0250 | Wrong commutation offset or pole pair count | 1116, 1100 | Run motor ID routine |
| Drive trips at high current with following error | F-0250 | Motor winding data incorrect | 1110, 1112, 1118 | Re-enter motor data set from data sheet |
10.7 Step-by-Step Diagnosis Procedure
- Read the active fault code from the 611D 7-segment display and the diagnostic buffer (HMI menu: Diagnostics → Drive).
- Decode the fault code per the SIMODRIVE 611D list manual (PJFE, PJLM, or PJLU).
- Read parameter r794 to identify the active firmware version.
- If the fault message text references parameter 1011, determine which 1011 the drive is flagging (encoder type, sensor type, or motor type) by consulting the matching parameter list.
- Verify the motor data set values against the 1FK7022-5AK74-1HG0 motor data sheet. Pay particular attention to pole pair count, EMF constant, winding resistance, and inductance.
- Run the motor identification routine and re-save the data set to FEPROM.
- Power cycle the drive and re-test.
11. Verification and Acceptance
After successful commissioning, perform the following acceptance tests before releasing the machine to production.
- Current offset trim at standstill: Verify with HMI current display within ±0.05 A of zero at standstill with no load.
- Direction of rotation check: Verify the motor matches MD32100 sign convention (positive command = clockwise looking at the shaft end).
- Following error test: Run at 10%, 50%, and 100% of programmed feedrate; verify K_v factor and KV gain are stable.
- Temperature rise test: Run at rated load for 30 minutes; verify motor temperature stabilizes below 80% of the rated maximum (typically 120 °C for 1FK7 class B insulation, so target < 96 °C).
- EnDat absolute position retention: Power down the drive, wait 30 seconds, power up, verify the axis position is restored to the absolute encoder reading (no re-referencing required).
- Brake timing (if equipped): Verify the holding brake engages within 50 ms of brake signal removal and releases within 50 ms of brake signal application. Measure with an oscilloscope on the brake voltage.
- Following error alarm threshold: Verify the axis trips on MD36400 / MD36600 if the following error exceeds the configured threshold under a forced disturbance.
12. Recommended Long-Term Migration Path
Siemens officially recommends a complete migration to Solution Line (SINAMICS S120) for 1FK7 motor support. The 611D platform's support for newer motor families is limited and firmware-version-specific. If the 840D Powerline is expected to be in service for several more years, the practical choices are summarized below.
| Option | Description | Effort | Risk | Recommended When |
|---|---|---|---|---|
| 1. Replace with 1FT6 equivalent | Source a new-old-stock 1FT6024-6AK71-3AG0 | Low | Low | 1FT6 stock available; no supportability concerns |
| 2. Commission 1FK7 on 611D | Use the procedure in Section 9 with verified data set | Medium | Medium (supportability, firmware version dependency) | Short-term fix, Powerline platform scheduled for retirement within 2 years |
| 3. Full migration to Solution Line | Replace NCU 7x0 with NCU 710.3B + SINAMICS S120 line-up | High | Low (long-term) | Powerline platform scheduled for more than 2 years of additional service; multiple motor upgrades planned |
Option 2 is the only path that does not require changing the 611D hardware, but it accepts a supportability risk if the 611D firmware must be upgraded in the future or if the 1FK7 motor must be replaced with a newer variant. Option 3 is the Siemens preferred long-term path and is the only option that supports the full 1FK7 / 1FT7 motor family without firmware constraints.
FAQ
What is the direct equivalent of 611D parameter 1104 in SINAMICS S120?
1104 (Motor_Max_Current) in 611D maps to p323 (Mot I_max) in SINAMICS S120. Both parameters represent the maximum permissible motor current in A rms, expressed in 0.01 A increments on recent firmware.
Why does the 611D drive fault when I connect a 1FK7 motor with EnDat encoder?
The 611D drive must be configured for the EnDat protocol via parameter 1011 (encoder type). Earlier 611D firmware versions only support incremental TTL. Verify the 611D firmware is 4.2 SP3 or later with EnDat 2.1 support, and set the encoder type to EnDat 2.1 (value 3 or 4 depending on firmware).
What does parameter 1011 control on a 611D drive?
Parameter 1011 is firmware-dependent. In older PJFE (3.x) firmware, 1011 controls the encoder type. In PJLM (4.0–4.2) firmware, 1011 is a combined encoder type + sensor type field. In PJLU (4.3 and later) firmware, 1011 controls the temperature sensor type only, and the encoder type moved to parameter 1017/1019. Verify the function of 1011 by reading the active firmware version (r794) and consulting the matching parameter list.
Can I copy a Solution Line commissioning backup directly to a Powerline 611D module?
No. Solution Line backups are in SINAMICS parameter format (p1xxx, p2xxx, p3xxx) and Powerline modules use 1xxx/2xxx format. The parameters must be entered manually or via a data set copy tool that handles the format conversion. The one confirmed direct mapping is 611D 1104 = SINAMICS p323. Other parameters must be derived from the SINAMICS S120 List Manual and the matching 611D parameter list.
What is the recommended migration path for 1FT6 motors on a 840D Powerline?
Siemens recommends a full migration to 840D Solution Line (NCU replacement + SINAMICS S120 line-up) for 1FK7 motor support. If the Powerline platform is expected to remain in service, the practical choices are: (1) replace the 1FT6 with a 1FT6 equivalent (no electrical change), (2) commission the 1FK7 on 611D with a verified data set and accept the supportability risk, or (3) full migration to Solution Line.
Does the 1FK7022-5AK74-1HG0 need a different power cable than the 1FT6024?
Yes, in most cases. The 1FK7022-5AK74-1HG0 uses an M23 power connector with a smaller pin pitch than the 1FT6024 connector. Verify the power connector style against the Siemens 1FK7 motor data sheet and replace the power cable with the correct 6FX2002 motor power cable family (6FX.002-5 series for 1FK7, cross-section 1.5 mm² per phase for the 22-frame size).
What is the minimum 611D firmware version for EnDat 2.1 absolute encoders?
The minimum 611D firmware version for EnDat 2.1 support is 4.2 SP3. Earlier firmware versions support incremental TTL/HTL encoders and SSI absolute encoders only. EnDat 2.2 requires 4.3 or later. Read parameter r794 on the 611D module to verify the installed firmware version before commissioning.