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MELSEC-Q
7 APPLICATION FUNCTIONS
7.9 Stopping/Restarting the Cyclic Transmission and Stopping Link Refreshing (Network Test)
The remote I/O network can use the "network test" of GX Developer to stop and restart
cyclic data.
This function is useful when other station's data should not be received or when the
host's data should not be sent at system startup (when debugging), etc.
Station No. 1
Station No. 2
Station No. 3
B
2) Link refresh
2) Link refresh
2) Link refresh
CPU
Station No. 1
Station No. 2
Station No. 3
LB
1) Link scan
Master module
1) Link scan
1) Link scan
Remote I/O station
For details about routing, refer to the Q corresponding MELSECNET/H Network
System Reference Manual (PLC to PLC network).
1) Stopping/restarting the cyclic transmission stops or restarts the data
receiving (link scan) between the network modules of the applicable
station. However, the data receiving (link refresh) between the
programmable controller CPU and master modules cannot be stopped
or restarted by this processing.
2) Execution using GX Developer
Through the network test, link startup, link stop and forced link startup
can be performed using GX Developer. For details on the network
testing methods, refer to the GX Developer Operating Manual.