Overview

The 750-652 Module implements the byte-level handshake required to communicate with a WAGO 750-652 Serial Interface module through its process image. It supports continuous transmit and event-driven receive using the module’s control (C0/C1) and status (S0/S1) bytes.

Use WAGO tools such as Wago-I/O-Check to configure module parameters (communication type RS-232/422/485, process image size, baud rate, etc.). Refer to the WAGO 750-652 datasheet for wiring and bus coupler setup.

Usage

• Add a 750-652 module to a supported IOServer.
• If the module is configured in Wago-I/O-Check with a non-default process image size, un-hide the Signals in the module and adjust BinaryEncodedLength for both RX_DATA and TX_DATA to the same value.
• Connect the module events:
  • Write
  • WriteSuccess
  • Read

  In addition, Init, Inited and Error can be connected if needed.

  Note: Another IOServer set up with a CDPTransport can connect to this block. Connecting the CDPTransport causes that IOServer to communicate its data with the 750-652 module.

Performance

There is a limited amount of data (RX_DATA/TX_DATA size) that can be pushed through this module at any time. In addition, there is a limit to the cycle-time (fs) that the Wago buscoupler scans the bus and 'runs' the module. Some protocols do not play well with data that is segmented into several chunks separated by 1/fs time intervals. These issues may influence the usability of the module, and care should be taken to verify that the module is suited for the type of communication used.

Events

The 750-652 Module defines the following events:

The definition for CM_MESSAGE_RAW can be found in CDPTransport.

Signals

The following hidden signals map directly into the 750-652 process image. They are provided for reference only; manipulating them externally may interfere with normal operation. To show the signals, make sure to un-check "Hide Internal Items" in the node filter.