Mitsubishi Electric MELSEC iQ-R Series User Manual page 65

When an FB cannot be executed for two or more network cameras simultaneously
Item to check
In "External Device Configuration", check
whether different port numbers are set to
each programmable controller.
When the operation is completed neither successfully nor with an error
Item to check
Check whether the label (o_bOK or o_bErr)
turns on after turning off and on the FB
execution command and then 10 seconds
has elapsed.
Action and cause
After setting different port numbers to each programmable controller, execute the FB again.
If the same port number is set to the programmable controllers in "External Device Configuration", the
simultaneous socket communications cannot be performed.
Action and cause
Restart the programmable controller and the network camera, and execute the FB again.
The open processing may have failed to complete at the specified connection number.
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