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Chapter 8 Communication Functions
8-76
8.5.2 Communication I/F module
MASTER-K120S series supports various kinds of communication I/F module.
In this time, Built-In Cnet in main unit must be set to ‘Off’ as below and only one communication module can be extended
1) Usage of G7L-CUEB
Using G7L-CUEB, MASTER-K120S can connect to other PLC by dedicated modem or dial-up modem
• Set TM/TC switch to ‘On’ when uses remote connection function
• Set TM/TC switch to ‘Off’ when uses data communication function
• Data communication and remote connection function are not allowed simultaneously
• Data communication mode supports every communication protocol but In remote connection function supports dedicated
protocol only.
2) Usage of G7L-CUEC
Channel 0 can be used as RS-422/485 I/F by using G7L-CUEC I/F module
Operating method is same as built-in Cnet interface and wiring is as below
Wiring Example : RS-422 I/F
BUILT_IN CNET
ROM MODE
OFF ON
Must be off
TM/TC Switch
RDA
RDB
S
DA
S
DB
SG
Master
Slave Slave Slave
RDA
RDB
S
DA
S
DB
SG
RDA
RDB
S
DA
S
DB
SG
RDA
RDB
S
DA
S
DB
SG
Terminating
resistor