Communication
2.3 Modbus RTU Master
88 SICAM Q100, 7KG95xx, System Manual
E50417-C1040-C522-A8, Edition 09.2020
The following parameters can be set for the Modbus RTU Master bus protocol:
2.3.2 Modbus RTU Master Diagnosis
The diagnosis for Modbus RTU master and Modbus gateway allows:
• checking the status of the serial communication with message and error counters and an overview of the
configured serial interface parameters
• an overview of the request messages sent by the Modbus master including the request status for each
message
• an overview of the last 5 messages sent via Modbus gateway (only available if the Modbus gateway func-
tion is enabled)
The message and error counters can be reset if necessary by clicking the Clear counters button.
Table 2-67 Modbus RTU Master Settings
Parameter Default Setting Setting Range
Baud rate 19 200 bit/s 1200 bit/s, 2400 bit/s
4800 bit/s, 9600 bit/s
19 200 bit/s, 38 400 bit/s
57 600 bit/s, 115 200 bit/s
Parity Even None, 1 stop bit
Even
Odd
None, 2 stop bit
Additional inter-character timeout 1 ms 0 ms to 100 ms
Maximum 0x/1x register gap 40 0 to 200
Maximum 3x/4x register gap 10
NOTE
The parameterization of the serial communication via the RS485 interface, the Modbus slave devices, and the
associated mapping are described in detail in the SICAM Q100 device manual, chapters 8.3.7.3 and 8.3.7.4.
SYS_SICAM_Q100_US.book Page 88 Thursday, September 24, 2020 1:17 PM
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