Chapter 8 Communication Functions
8-2
8.1.2 System configuration method
According to the method of connection, the system using MASTER-K120S built-in communication can be composed.

1) Connecting system configuration (link between MASTER-K’s)

(1) 1:1 connection with general PC
a) Communication program made by C or BASIC computer language on the user’s computer, or utility program like
FAM or CIMON can be used.
b) Wiring method

PC MASTER-K120S main
unit
Pin No.
Pin assignment And direction
Pin No. Signal
1 1 5V
2 2 RXD1
3 3 TXD1
4 4 RXD2
5 5 SG
6 6 5V
7 7 TXD2
8 8 SG

9
9 SG
TXD1, RXD1 are for loader communication and TXD2, RXD2 are for Cnet
1
2
3
4
5
6
7
8
9
Female Type
RS-232C interface
MASTER-K120S main unit