Chapter 4: PLC Communications
Port 2 (RS-232) – Modbus RTU or ASCII
Modbus RTU
Port 2
Modbus RTU Master Devices
PC
Another CLICK PLC
CLICK PLUS PLCs
See Note on previous page about
connecting a C-more Micro-Graphic
panel to RS-232 Port.
ASCII
Other Devices
Supporting Modbus RTU
C-more and C-more
Micro-Graphic Panel
Master Mode
Devices that SEND ASCII messages
P-1
W-2 C-5
Other devices
that can send
ASCII data.
Barcode
Weight Scale
Reader
Modbus RTU Slave Devices
W-2 C-6
P-4
Devices that RECEIVE ASCII messages
Other Devices
Supporting Modbus RTU
Other devices
Slave Mode
that can receive
Serial Text
ASCII data.
Another CLICK PLC
Display
Serial Printer
W-2 C-6
P-5
W-2 C-5
P-2
CLICK PLUS PLC Hardware User Manual, 1st Edition, Rev. B – C2-USER-M
4-9
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