Use the application, required I/O, motion or analog functions, expansion needs, communications, and output type to select a Delta DVP PLC. Decode the catalog number only as an initial hardware check; confirm electrical ratings and terminal functions on the unit nameplate and applicable product documentation before wiring.
Select a DVP Series by Control Requirement
The available evidence identifies ES, EX, EH2, PM, SA, SC, SS, SX, and SV families. Match the required function first, then calculate I/O and expansion requirements.
| Series | Evidence-supported capability | Selection use |
|---|---|---|
| ES | Sequential control; described ES hardware includes high-speed counting, pulse output, interrupts, and serial communications | Basic machines requiring compact control and expansion |
| EX | Digital and analog I/O | Feedback control requiring both signal types |
| EH / EH2 | CPU plus ASIC processing, floating-point support, and instruction execution as fast as 0.24 microseconds | Higher computation demand |
| PM | Two-axis linear or circular interpolation; pulse output up to 500 kHz | Coordinated two-axis positioning |
| SS | Compact construction and basic sequential control | Small logic-control applications |
| SA | 8k-step memory and expansion by eight function modules | Applications needing additional memory or functions |
| SC | 100 kHz high-speed pulse output and 100 kHz pulse counting | Pulse-based motion or counting |
| SX | Two analog inputs, two analog outputs, and expansion by eight function modules | Compact analog control |
| SV | CPU plus ASIC processing, floating-point support, and instruction execution as fast as 0.24 microseconds | Compact, computation-intensive control |
The supplied size classification defines ultra-small controllers as no more than 64 I/O points, small controllers as 64-256, medium controllers as 256-2048, and large controllers as more than 2048. Because the stated boundaries overlap at 64 and 256 points, do not use those labels as acceptance criteria; select against the actual required and supported I/O count.
Decode the DVP Catalog Number
The stated naming convention begins with DVP. Read the remaining fields as a compact description, but note that the evidence lists both 01 and 11 as DC power codes without distinguishing them.
| Field | Meaning in the supplied convention |
|---|---|
| Positions 1-2 | Total I/O points |
| Position 3 |
E: E-class CPU; X: expansion module; S: S-class CPU |
| Position 4 |
C: non-expandable CPU; S: standard CPU; X: mixed analog/digital CPU; M: input expansion; N: output expansion; P: input/output expansion |
| Positions 5-6 |
00: AC power; 01 or 11: DC power |
| Position 7 |
R: relay output; T: transistor output; N: no outputs |
| Position 8 |
2: enhanced-function version |
Under this convention, DVP14ES00R2 identifies 14 I/O points, an E-class standard CPU, AC power, relay outputs, and the enhanced-function suffix. The supplied example assigns it a 220 V AC supply. DVP16XM01N identifies a 16-point input expansion module using 24 V DC power and having no output channels. Verify these voltages on the selected hardware because the general code table states only AC or DC.
Account for PLC Architecture and Scan Operation
A complete PLC installation includes the CPU, system and user memory, input/output modules, power supply, and programming equipment. During operation, the controller samples inputs, executes the user program, and then refreshes outputs. Logic therefore acts on the sampled input state and reaches physical outputs during the output-refresh stage.
- Define the controlled loads and signals: discrete logic, analog process variables, pulse or axis control, data handling, and communications.
- Count local and expanded I/O, then identify required analog, temperature, or intelligent modules.
- Select relay or transistor outputs from the load and switching requirements; the catalog suffix distinguishes
RfromT. - Confirm the supply voltage, terminal assignments, module compatibility, and supported expansion on the actual hardware before wiring.
- Program the controller, run it, and verify sampled inputs, executed logic, refreshed outputs, and status indicators.
Integrate and Verify an ES Installation
The described ES controller includes a high-speed counter input up to 20 kHz, pulse output up to 10 kHz, four interrupt sources with priority management, and RS-232C and RS-485 interfaces. One ES PLC can expand to 256 I/O points. Available companion hardware includes I/O, intelligent A/D and D/A, and temperature-measurement modules; the temperature module accepts PT100 resistance sensors or J, K, R, S, and T thermocouples.
Mount the controller with its DIN retaining hardware or enclosure bolt holes, connect expansion modules through the expansion socket, and use the terminal and I/O labels to validate wiring. After energizing, check that the Power indicator illuminates. During program execution, verify the Run indicator; investigate the program if the Error indicator illuminates. WPLSoft is identified as the programming software used to enter ladder logic from a computer into the PLC, while DVP HPP02 is identified as a program-writing device.
FAQ
How do I decode a Delta DVP14ES00R2 PLC model number?
It denotes 14 I/O points, an E-class standard CPU, AC power, relay outputs, and an enhanced-function version. The supplied example specifies 220 V AC, but verify the voltage on the hardware nameplate before connection.
Which Delta DVP PLC supports two-axis interpolation?
The PM series supports two-axis linear and circular interpolation and pulse output up to 500 kHz.
How many I/O points can a Delta ES PLC expand to?
The described ES PLC can expand to 256 I/O points. Confirm that the selected CPU and expansion modules are compatible before finalizing the hardware list.
