CONFIGURATION
Part. No. 2400M2501_6 Touchpoint Pro
96 Technical Handbook
11 Configuring Modbus
Refer to the documentation supplied with the host computer for details of its communication and Modbus configuration.
Note: It is recommended that the host computer is configured to provide at least two retries in the event of a communication
loss with a minimum delay of 1 s between each poll, and a minimum timeout of 2 s.
Note: TPPR Modbus automatically uses two stop bits when parity is “None” and one stop bit when parity is “Odd” or “Even”.
To configure the TPPR Modbus communication parameters:
1. Login as an Engineer.
2. From the System Status screen select the Tool Box icon then Global Settings.
3. Select Modbus Settings> Edit to adjust the parameters.
4. When complete, select Save and exit settings.
Should be set to correspond to the baud
rate of the host system.
Should be set to correspond to the parity
checking set on the host system.
Each node connected to the RS485
highway must have a different address
setting in daisy chain or multi-drop
configuration.
Table 17. Modbus Parameter Settings
11.1 Modbus Register Allocation for Function 02 – Read Input Status
This function reads the input channel status bits. Each status bit can have the value 1 = Active or 0 = Not active. For the
Channel Type only, 1 = Analogue or 0 = Digital. There are twelve status bits for each channel. The maximum number of
status bits read in one frame is 512.
Table 18. Modbus Input Channels
Table 19. Modbus Output Channels
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