PD4-E ModbusRTU Online Manual

Communication settings

Slave address, baud rate and parity are dependent on the position of the S1 rotary switch and, if applicable, on objects 2028h, 202Ah, 202Dh.

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

Rotary switch

The PD4-E is equipped with a hex coding switch – similar to that shown in the following figure.

You can thereby determine the source for the slave address, the baud rate and the parity; the following table shows the possible combinations.


Position of the rotary switch Slave address Baud rate and parity
dec hex
0 0 Object 2028h Object 202Ah or 202Dh
1-14 1-E Number of the rotary switch Object 202Ah or 202Dh
15 F 5 19200, even Parity

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