Siemens SICAM Q100 - Modbus RTU Master; Functions and Properties for Modbus RTU Master

Communication
2.3 Modbus RTU Master
86 SICAM Q100, 7KG95xx, System Manual
E50417-C1040-C522-A8, Edition 09.2020
2.3 Modbus RTU Master
2.3.1 Functions and Properties for Modbus RTU Master
Schematic Overview of the Functioning of the Modbus RTU Master
Figure 2-8 Functioning of the Modbus RTU Master
Supported Modbus Register Sets
• Coil status registers (0x references, read only)
• Input status registers (1x references, read only)
• Input registers (3x references, read only)
• Holding registers (4x references, read only)
Device type: SCADA
Device name: SCADA PCx
Device type: SICAM Q100
Device name: Q100_1
Data object image
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Measured values MV x Slv 1 from Modbus slave device 1
Measured values MV x Slv 2 from Modbus slave device 2
…
…
Measured values MV x Slv 8 from Modbus slave device 8
(x = 1 to 15)
Indications Indication y Slv 1 from Modbus slave device 1
Indications Indication y Slv 2 from Modbus slave device 2
…
...
Indications Indication y Slv 8 from Modbus slave device 8
(y = 1 to 6)
Ethernet
Modbus TCP
RS485:
Modbus Master
Modbus TCP
Ethernet
Switch
Modbus RTU
RS485:
Modbus Slave
RS485:
Modbus Slave
Ethernet connection
to further device
combinations of the
same type
SYS_SICAM_Q100_US.book Page 86 Thursday, September 24, 2020 1:17 PM