Chapter 8 Communication Functions
8-28
8.1.7 1:1, 1:n Built-in communication between MASTER-K120S's

1) Introduction

1:1 built-in communication between MASTER-K120S's is that which constitutes a built-in communication system with the
method of 1(master) : 1(slave). Setting Base parameter and communication parameter in KGLWIN can easily constitute this
system. Communication protocol currently applied is the same with Cnet I/F used for MASTER-K. Main functions are following.
• It can organize device area into 64 data access blocks by WORD unit, and set a communication time-out limit for each
block.
• It can reestablish flag in relation with error codes and slave PLC operating mode according to parameter setting.
• It can reset flag related with error codes and sending/receiving error frequency of each parameter.
• It monitors communication status, using monitoring function of KGLWIN.
This communication cabling map is the same for (3) 1:1 Connecting with other MASTER-K120S in 8.1.2 "System configuration
method using built-in communication."
MASTER-K120S
main unit
(Slave: station No. 31)
MASTER-K120S
main unit
(Master: station no. 1) G7E-DR10A
1:1 built-in communication between MASTER-K120S