Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual page 210

When 'Simple CPU communication status for each setting number' (Un\G721936 to Un\G721999) is "4H: Communication
stop", communications can be restarted by turning off and on 'Request to restart fixed interval communication for each setting
number' (Un\G721904 to Un\G721907). (If the status is other than "4H: Communication stop", the restart request is invalid.)
Ex.
The operation at communication stop/restart request for the setting No.1
'Request to stop fixed interval
communication for each setting number'
(Un\G721900.0)
'Request to restart fixed interval
communication for each setting number'
(Un\G721904.0)
'Execution status flag for each setting
number' (Un\G721908.0)
'Simple CPU communication status for each
setting number' (Un\G721936)
'Execution interval (current value) for each
setting number' (Un\G722128)
(1) The request is turned on by the program.
(2) The request is turned off by the system.
(3) The current value is stored.
Checking with "simple CPU communication diagnostics"
The communication status of the simple CPU communication function can be checked with "Simple CPU Communication
Diagnostics".
For details, refer to the following.
Page 294 Simple CPU communication diagnostics
1 FUNCTIONS
208
1.15 Simple CPU Communication Function (RJ71EN71, RnENCPU (Network Part))
Stop request Communication stop Communication stop
(1)
ON
OFF
ON
OFF
ON
OFF
3
(3)
Restart request
(2)
(1)
4
0
Communication restart Communication restart
(2)
3
(3)