Communication Via Rs485 Interface - Siemens SICAM Q100 System Manual

Communication
2.1 Communication Interfaces
2.1.2

Communication via RS485 Interface

Devices equipped with an RS485 interface can communicate serially with peripheral devices using the Modbus
RTU Master and Modbus RTU Slave bus protocol. The serial interface supports the transmission of measured
data and indications. The connection is a 9-pin D-sub connector plug.
Data of the RS485 Interface when Using the Modbus RTU Master Protocol
The RS485 interface comes with the following parameters set by the manufacturer:
• Bus protocol:
• Baud rate:
• Parity:
• Additional inter-character timeout
• Maximum 0x/1x register gap
• Maximum 3x/4x register gap
You can modify these parameters during the parameterization, see Device Manual SICAM Q100, chapters 8
and 9.
Data of the RS485 Interface when Using the Modbus RTU Slave
The RS485 interface comes with the following parameters set by the manufacturer:
• Bus protocol:
• Baud rate:
• Parity:
• Access rights
• Communication supervision time:
You can modify these parameters during the parameterization, see Device Manual SICAM Q100, chapters 8
and 9.
16
Modbus RTU Master
19 200 bit/s
even
1 ms
40
10
Modbus RTU
19 200 bit/s
even
full
600 * 100 ms
SICAM Q100, 7KG95xx, System Manual
E50417-C1040-C522-A8, Edition 09.2020