Appendices
A-40
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
You can change multiple bits to TRUE simultaneously and you can send output data to multiple node
addresses simultaneously.
The following diagram shows the transmission timing. After the COS send instruction is sent to the
DeviceNet (at the I/O refresh timing for the CPU Unit), the COS transmission is executed to each slave
immediately after the refresh (remote I/O communications), which is performed with each slave during
the communications cycle. Therefore, when there are a lot of destination slaves, the COS send timing
may be delayed in order of the node addresses.
DeviceNet Unit
Multiple COS send switches (node address #1, #2, #3) changed to
I/O refresh
Time
COS send instruction
Node #1 Node #2 Node #3 Node #4 Node #1
COS
#1
Node #2
COS
#2
Node #3
COS
#3
Node #4
Communications cycle time Communications cycle time
Slave # 1
Slave # 2
Slave # 3
: I/O using normal connection
: Output using COS (sent to fit in between
normal cycles)
CPU Unit user
program
FALSE to TRUE
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