Functionality¶
| Parameter | Value |
|---|---|
| Digital inputs/outputs | 8 (24 VDC) |
| Fast counter | Integrated, many configurable operating modes |
| LED displays | For signal states, errors and supply voltage |
| Internal power supply | Through the communication module bus |
| External power supply | Via the terminals ZP and UP (process voltage 24 VDC) |
| Effect of incorrect input terminal connection | Wrong or no signal detected, no damage up to 35 V |
In the operating mode Interrupt IO device, the channels can be configured as follows:
- Input
- Output
- Interrupt input
In this way, important input information can be evaluated independently of the program cycle and outputs can be set.
In the operating mode Counter, the channels can be configured as follows:
- Input
- Output
- 32-bit up/down counter (uses C0…C3) as a 32-bit counter without limit
- 32-bit periodic counter as a 32-bit counter with a limit
- Limiter for a 32-bit counter (limit channel 0)
- 32-bit up counter (forward counter) with the frequencies 50 kHz, 5 kHz and 2.5 kHz
- Pulse-width modulation (PWM) with a resolution of 10 kHz
- Time and frequency measurement
- Frequency output
Used as a fast counter module, the 8 channels of the multi-function module DC541-CM can be configured and combined individually, easily and versatilely in the PLC configuration. The module is therefore also excellent for universal high-frequency counting tasks up to 50 kHz. In addition, it has measuring functions for rotational speed, time and frequency.
These different channel configurations can now be combined flexibly on-board.
Example 1: 32-bit up/down counter incl. zero trace and touch-trigger for max. 50 kHz plus 4 accompanying limiting values (comparison values). When the counter reaches one of the comparison values, the corresponding output can be set in order to trigger control functions at the machine or installation directly.
Example 2: 2 counters for 50 kHz plus frequency measurement with a resolution of 200 µs plus 4 digital I/Os.
Further examples and a detailed description of the fields of application are contained in the chapter “System Technology of DC541: DC541-CM Interrupt and Counter Module
Commissioning is carried out via the user program by using the appropriate function blocks.