Communication
2.4 Modbus TCP to Modbus RTU Gateway
92 SICAM Q100, 7KG95xx, System Manual
E50417-C1040-C522-A8, Edition 09.2020
2.4 Modbus TCP to Modbus RTU Gateway
Schematic Overview of Modbus TCP to Modbus RTU Gateway
Figure 2-10 Functioning of Modbus TCP to Modbus RTU Gateway
Device type: SICAM Q100
Device name: Q100 1
Ethernet
RS485:
Modbus Master
Q100 2
Ethernet
Switch
Q100 x
RS485:
Modbus Slave
RS485:
Modbus Slave
Ethernet connection
to further device
combinations of the
same type
Device type: SCADA
Device name: SCADA PCx
Data object image
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Measured values MV x Slv 1 from Modbus slave device 1 of Q100 1
Measured values MV x Slv 2 from Modbus slave device 2 of Q100 1
Measured values MV x Slv 1 from Modbus slave device 1 of Q100 2
Measured values MV x Slv 2 from Modbus slave device 2 of Q100 2
…
…
(x = 1 to 15)
Indications Indication y Slv 1 from Modbus slave device 1 of Q100 1
Indications Indication y Slv 2 from Modbus slave device 2 of Q100 1
Indications Indication y Slv 1 from Modbus slave device 1 of Q100 2
Indications Indication y Slv 2 from Modbus slave device 2 of Q100 2
…
...
(y = 1 to 6)
Modbus TCP
Gateway
Modbus RTU
SYS_SICAM_Q100_US.book Page 92 Thursday, September 24, 2020 1:17 PM
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