Installing Siemens S7-Technology V4.2 SP3: Download Guide

Overview

SIMATIC S7-Technology V4.2 is the optional technology package that extends STEP 7 V5.x with motion-control primitives for SIMATIC S7-300 and S7-400 technology CPUs. The package adds technology objects (TOs), a dedicated configuration tool (S7TConfig), and a runtime library to the standard STEP 7 environment, allowing speed-controlled axes, positioning axes, and synchronized axes to execute on the same PLC that handles discrete and analog I/O. S7-Technology is the answer to the historical requirement for separate motion controllers (FM 354, FM 357, SIMOTION) for medium-complexity motion tasks: the technology CPU integrates PLC and motion into a single scan, with the position loop closed inside the CPU's hardware at cycle times as low as 1 ms.

Maintenance for V4.2 has been delivered as a series of service packs: SP2, SP3, SP3 HF1 (trial), SP4, and SP5. The trial version of SP3 HF1 is the entry point for evaluation; the licensed media (DVD or OSD) installs the base V4.2, and the service packs are applied as delta installers on top. Download of the trial and the service packs is gated by a Siemens Industry Online Support registration and a one-time export-control acknowledgement, which is the source of the most common download errors reported by users.

This reference documents the download and installation procedure for the S7-Technology V4.2 SP3 / SP4 / SP5 packages, the configuration of a first technology object, the runtime programming interface, and the diagnostic and troubleshooting path. It targets the engineer who is bringing up a brownfield S7-300 / S7-400 line or evaluating the package for a new machine.

Prerequisites

Resolving the Export-Restricted Download Error

The most common failure mode reported for S7-Technology V4.2 SP3 is the generic error Reference #97.ffd4317.1373565111.3335fb67 returned by the Siemens Industry Online Support portal. The error is not a software bug; it is the result of the click-through export-control screening that is mandatory for software classified under EU and US dual-use lists. The S7-Technology package is flagged as dual-use even though the runtime itself does not include cryptographic primitives; the flag is at the package level. The fix is procedural.

1. Open the trial-version entry directly: S7-Technology V4.2 SP3 HF1 trial. The portal displays the export-control questionnaire on the first download attempt from a given session.
2. Click "Download". The portal displays the export-control questionnaire (DUAL USE, AL: N, ECCN: EAR99 in most regions). Select "I am the end user" or "I am a distributor" as appropriate. Pick the country of end use; embargo destinations are blocked at the country code level and the form returns a silent rejection.
3. Submit the form. The download begins with a streamed .zip or an HTTPS file response. If the error persists, clear the browser cookies for support.industry.siemens.com and repeat; cached session tokens can carry an expired or denied export acknowledgement.
4. Mirror the same procedure for Service Pack 4 (entry 94737497) and Service Pack 5 (entry 109749472); each service pack ships as a separate installation and requires its own export acknowledgement in the same user session.

If the export questionnaire is missing entirely from the page, the user account already carries the right entitlement (for example, an enterprise account whose administrator pre-accepted the export terms on the company's behalf). The download button on the entry page then leads directly to the file download. If the button is greyed out, the user lacks the role required for technology downloads; this is controlled by the Support Role attribute in the Siemens Customer Center profile.

Service Pack Lifecycle and Selection

S7-Technology V4.2 was originally released without a service pack identifier. Cumulative maintenance has been delivered through SP1, SP2, SP3, SP3 HF1, SP4, and SP5. For a new installation, install the latest service pack on top of the base V4.2 media; the SPs are delta installers, not full packages, with the exception of the trial version which embeds SP3 HF1 as a self-contained install.

Service packs are cumulative with respect to the base V4.2 installation. Installing SP3 on a system that already has SP2 is safe; the installer performs an in-place upgrade of the technology library and preserves the existing S7TConfig projects. The trial version (SP3 HF1) can coexist with a licensed V4.2 SP4 / SP5 install in different STEP 7 projects on the engineering station, but cannot be loaded onto the same CPU firmware image as a licensed installation; the firmware allows only one of the two license models per CPU.

Installation Procedure

1. Close SIMATIC Manager, S7TConfig, and any active STEP 7 dialog. The installer refuses to start if S7TGSVRX.EXE or S7TGSrv.exe is loaded. The setup prompts you to close them; you can also kill the processes manually from Task Manager if the prompt hangs.
2. Run Setup.exe from the SP3 / SP4 / SP5 archive (or the trial DVD root). The setup language defaults to the OS locale; switch to English (US) in the installer's first dialog if the manuals are required in English. German is the only other fully translated language; the remaining UI strings are English with localized error messages.
3. Accept the license agreement. The trial version requires ticking "I accept the 14-day evaluation terms" in addition to the standard EULA.
4. Select the installation scope:
   • S7-Technology CPU Library – runtime blocks for the technology CPU firmware (mandatory).
   • S7TConfig – the technology configuration tool (mandatory for engineering).
   • S7-Technology Documentation – programming manual, configuration manual, function reference, and the S7TConfig online help (recommended; ~ 600 MB).
   • Migration Tool – for projects originally built with FM 354 / FM 357 or SIMOTION (optional; rarely used in 2024+).
5. Choose the STEP 7 target directory. The default is C:\Program Files (x86)\Siemens\Automation\STEP7\S7TECH. The installer creates the subfolders \bin, \lib, \doc, and \samples.
6. Confirm the install. The setup runs the technology-library registration (S7TLib.exe /register) and updates the Windows registry key HKLM\SOFTWARE\Wow6432Node\Siemens\S7Technology\Version. The Version value is read by SIMATIC Manager to determine which technology options are available in the project's CPU properties.
7. Reboot. The runtime service S7TGSrv is registered as a manual-start service; reboot ensures the technology-DLL cache is reloaded. The service can also be restarted manually with net start S7TGSrv from an elevated command prompt.

Hardware Configuration Prerequisites

Before creating a technology object, the hardware configuration in HW Config must be complete. The technology CPU references its drive and encoder as PROFIdrive stations; the telegrams must be set to the correct numbers, and the axis number on the drive must match the S7TConfig axis number.

1. Open the SIMATIC Manager project and double-click HW Config on the technology CPU's station.
2. Insert the drive in the PROFIBUS or PROFINET topology. For a SINAMICS S120 with CU320-2, place the drive as a DP slave on PROFIBUS or as a PROFINET IO device on the technology CPU's PROFINET interface.
3. Open the drive's Properties → Telegram Configuration. Select the standard telegram 3 (positioning with 32-bit position, 32-bit velocity, torque) or 5 (with additional actual values). Avoid telegram 110 for the technology CPU; the technology CPU does not parse the extended status bits of telegram 110.
4. For the encoder, configure telegram 81 on the same PROFIdrive station, or on a separate encoder station. The technology CPU expects the encoder telegram to be on a different PROFIdrive station than the drive telegram; co-locating them in the same station causes a cyclic-data collision that the S7-Technology runtime logs as 0x8005 Encoder error.
5. Save and compile HW Config. The compile must complete with zero errors; warnings about unused slots can be ignored.

Creating the First Technology Object

Technology objects are configured in S7TConfig, which is launched from SIMATIC Manager via Options → Technology. The tool works against the open STEP 7 project, not against the live PLC, so configuration is offline until the project is downloaded. The configuration persists in the project under the technology CPU's S7 program as a set of DBs and source files.

1. In SIMATIC Manager, right-click the technology CPU → Properties → Technology. Confirm the CPU type supports technology objects (firmware ≥ 2.0.0 for 31xT, ≥ 2.1.x for ET 200S FC). The properties dialog shows the technology package version expected by the CPU firmware; mismatches are flagged in red.
2. Open S7TConfig. The left-hand tree shows the technology CPU; expand it to reveal the Axes and Synchronous Operation branches. If the tree is empty, the project CPU is a non-technology variant; right-click the S7 program → Change CPU → select a 31xT or 317T variant.
3. Insert a new axis: Axis → New → Positioning Axis. The wizard prompts for:
   • Axis number (1–32 for 31xT, 1–16 for ET 200S FC).
   • Drive assignment (analog output channel 0 or PROFIdrive telegram 3/5/6/7/9/102).
   • Encoder assignment (PROFIdrive telegram 81 or SSI on the technology CPU's on-board interface).
   • Axis mode: Positioning, Speed-controlled, or Synchronous.
4. Set the mechanical configuration: load gear ratio, motor revolutions, load revolutions, position-tracking tolerance, and the units (mm, inch, °). The gear ratio is critical: an incorrect ratio causes a permanent following error that grows with velocity.
5. Set the limits: maximum velocity, maximum acceleration, maximum deceleration, jerk limits, software limit switches (positive/negative). The jerk limit is the derivative of acceleration; exceeding it during rapid stop can trip the drive's STO input on a SINAMICS S120.
6. Assign a Technology DB (DB 70–DB 99) and generate the instance DB by clicking Generate. The tool compiles the technology FB and binds the axis to the drive telegram. The generation step is mandatory; an ungenerated axis configuration cannot be downloaded.
7. Save the project, then download to the CPU. S7TConfig prompts for "Hardware download + Technology download"; accept both. The download streams the technology DBs, the runtime configuration, and the cam tables to the CPU firmware.

Technology Object Library and Programmatic Interface

The S7-Technology runtime exposes its function set as function blocks (FBs) in the standard library S7TECH\Lib\S7TechLib. The most frequently used blocks in a positioning sequence are:

Each call requires an Axis input of type TO_Axis_Pos or TO_Axis_Velocity, which is a multi-instance DB reference. Calling MC_Power with Enable = FALSE for longer than the configured pulse-disable window drops the drive stage. Siemens recommends keeping MC_Power in a slow cyclic OB (OB 1) rather than in OB 35 if the OB 35 period is below 4 ms; otherwise the watchdog trips the drive enable during a long positioning cycle.

For synchronous operation, the master and slave axes are configured in the same technology CPU and linked through a cam or gear object. The cam object holds a polynomial definition that maps master position to slave position; the runtime interpolates the polynomial at the position-loop sample rate. SP5 introduces support for non-linear cams with up to 1,000 interpolation points; SP3 and SP4 are limited to 500 points.

Cam Configuration and Synchronous Operation

Synchronous operation is the strongest differentiator of S7-Technology against a generic positioning package. The technology CPU can engage a slave axis on a master axis's position, run a cam profile, and disengage at a defined master position – all inside the same scan, without external synchronization hardware. The configuration is performed in S7TConfig under the Synchronous Operation branch.

1. Right-click Synchronous Operation → New Cam. The cam editor opens with a graphical view of master vs. slave position.
2. Define the cam table. Use the editor's polynomial, VDI 2143, or point-list entry mode. For a typical press-feed application, use the VDI 2143 mode and define the dwell, acceleration, constant-velocity, and deceleration segments with the standard cam segments.
3. Set the cam scaling: master range, slave range, and the scaling type (linear, polynomial). The scaling is critical for both the start and end of the cam.
4. Assign the master axis (the virtual master or a real axis) and the slave axis. The slave axis is the axis that will track the master through the cam profile.
5. Configure the engagement: MC_CamIn with a master position trigger, a slave position offset, and a scaling factor. The trigger can be "at master position" (positional trigger) or "immediately" (on command).
6. Set the disengagement: MC_CamOut at a defined master position; the slave continues on its last setpoint at the disengagement.
7. Generate and download.

Safety Integration with F-CPUs

The CPU 317TF-2 DP and CPU 317TF-3 PN/DP are F-CPUs: they run the standard SIMATIC S7 program plus a safety program in parallel. The safety program uses the F-library S7F and operates on PROFIsafe telegrams. The technology objects on an F-CPU can be brought to a safe stop in three ways:

1. STO (Safe Torque Off): the safety program asserts the STO bit on the drive's PROFIsafe telegram; the drive removes torque within 5 ms. The technology object on the CPU receives the AxisError code 0x800F "Safe stop active" and transitions to the ErrorStop state.
2. SS1 (Safe Stop 1): the safety program asserts SS1; the drive ramps down to zero with the configured safe-stop ramp, then asserts STO. The technology object receives 0x8010 "Safe stop 1 active".
3. SS2 (Safe Stop 2): the safety program asserts SS2; the drive holds the axis at its current position with the safety controller active. The technology object receives 0x8011 "Safe stop 2 active" and remains in Standstill with the controller live.

The S7-Technology configuration does not directly handle PROFIsafe. The safety program in the F-CPU's safety DB drives the PROFIsafe telegrams, and the technology CPU's runtime reacts to the axis state changes the drive broadcasts. Configure the safe-stop behavior in the technology CPU's Axis → Safety settings, where you can choose between Hold (the axis holds position) and Stop with ramp (the axis follows the configured deceleration).

Diagnostic and Verification Tools

After the project is downloaded, use the following checks to confirm the technology stack is healthy:

1. S7TConfig → Online → Axis Diagnostics: shows the current actual position, actual velocity, following error, status word, and the last error code (e.g., 0x8001 for "Configuration error", 0x8005 for "Encoder error").
2. STEP 7 → PLC → Diagnostic Buffer: filter to source "Technology". Look for entries of the form Technology: TO 1, axis error 0x8005 on a CPU 317T-2 DP. The diagnostic buffer retains the last 100 entries; older entries roll off.
3. Web server of the technology CPU (CPU 31xT PN/DP and CPU 317TF-3 PN/DP only): browse to http://<cpu-ip>/technology/axis1.html for a live readout. The web server is enabled in HW Config under CPU Properties → Web Server; it requires a password if the CPU is configured for Web-access authentication.
4. Trace: use the integrated trace to record actual position vs. setpoint and detect following-error excursions beyond the configured tolerance. The trace samples at the position-loop rate; the recorded signal can be exported as CSV for post-processing.
5. Cam editor preview: in S7TConfig, open the cam object and click Simulate to verify the polynomial without a live drive. The simulation shows the slave position, velocity, and acceleration for a virtual master sweep.

Troubleshooting Matrix

Migration to TIA Portal and Coexistence

Although S7-Technology V4.2 is a STEP 7 V5.x option package, projects can be migrated to a TIA Portal environment when the S7-300/S7-400 is replaced by an S7-1500 with the SIMATIC Motion Control option. The SP5 release of S7-Technology adds a symbol-export hook that allows the S7TConfig project to emit a CSV with all technology-object names, setpoint / actual ranges, and cam table samples. The TIA importer reads the CSV and creates equivalent TO_PositioningAxis / TO_SynchronousAxis instances, which removes the manual re-keying that previously dominated migration windows. The CSV export is invoked from S7TConfig → Tools → Export for TIA Portal.

For greenfield S7-1500 designs, the S7-Technology V4.2 package is not required; the equivalent functionality ships natively in TIA Portal as the SIMATIC Motion Control option. Use S7-Technology V4.2 SP3 (or, preferably, SP5) only on brownfield S7-300/400 lines and on technology CPUs that remain in service. Mixing S7-Technology V4.2 with the TIA Motion Control option in the same project is not supported; the two packages are mutually exclusive runtime models.

Frequently Asked Questions