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4
FUNCTIONS
4.1 Cyclic Transmission Function
4.1.1 1 : n communication (B/W communication)
4 - 1
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
FUNCTIONS
5
PREPARATORY
PROCEDURES BEFORE
OPERATION
6
LINK DATA SEND/
RECEIVE PROCESSING
AND PROCESSING TIME
7
PROGRAMMING
8
TROUBLESHOOTING
CHAPTER4 FUNCTIONS
This chapter describes the functions of the local module.
4.1 Cyclic Transmission Function
This function allows cyclic data communication between master and local stations.
4.1.1 1 : n communication (B/W communication)
Data are written to the host station send range in the link relay (B) and link register (W),
and they are sent to other stations.
The link relay (B) handles ON/OFF information, and the link register (W) sends and
receives 16-bit data.
Figure 4.1 B/W communication data flow
Data memory
storage area
Q series local station
Local module
CPU module
Master station
B
W
B
W
B
W
Link data
storage area
Link data
storage area
Buffer memory
Buffer memory
Data memory
storage area
B
W
Data memory
storage area
Local station
B
W
B
W
Link data
storage area
Link scan
Link refresh
Data flow (Send/receive processing)