clear combination
active combination
back to configurator

CL4-E CANopen/USB/Modbus RTU Online Manual

Commissioning Parent topic: Commissioning

Configuring via Modbus RTU

Described in the following chapters is how you can establish the communication.

The controller is set to slave address 5ex works , baud rate 19200 baud, even parity, 1 stop bit. You can use the default switch to reset the controller to the factory settings. All changes take effect only after the controller is restarted.

Communication settings

The following settings can be performed:

Configuration Object Value range Factory settings
Slave address 2028h 1 to 247 5
Baud rate 202Ah 7200 to 256000 19200
Parity 202Dh
  • None: 0x00
  • Even: 0x04
  • Odd: 0x06
 0x04 (Even)
The number of data bits is always "8" here. The number of stop bits is dependent on the parity setting:
  • No parity: 2 stop bits
  • "Even" or "Odd" parity: 1 stop bit

The following baud rates are supported:

  • 7200
  • 9600
  • 14400
  • 19200
  • 38400
  • 56000
  • 57600
  • 115200
  • 128000
  • 256000

You must save the changes by writing value "65766173h" in object 1010h:0Bh. The changes are not taken over until after the controller has been restarted.

Establishing communication

  1. Connect the Modbus master to the controller via the RS-485+ and RS-485- (see X1 – CANopen/RS-485 IN) cables.
  2. Supply the controller with voltage.
  3. Change the configuration values if necessary.
    The controller is set to slave address 5ex works , baud rate 19200 baud, even parity, 1 stop bit.
  4. To test the interface, send bytes 05 65 55 00 2F A7 to the controller (you can find a detailed description of the Modbus function codes in chapter Modbus RTU).
    The object dictionary is read out.
▶   next

Contents