Mitsubishi Electric RD77GF8 User Manual page 131

Safety communications cannot be performed
The following lists the actions to be taken if safety communications cannot be performed.
Check item
Is a slave station (safety station) specified as a reserved station in "Network
Configuration Settings" of "Basic Settings" of the master station?
Do the station No., station type, and model name of communication
destination set in "Safety Communication Setting" under "Application Settings"
match those set in "Network Configuration Settings" under "Basic Settings" of
the master station?
Is safety connection set among safety stations that perform safety
communication?
Is the same open method set among safety stations that perform safety
communication?
Is the setting value of "Sending Interval Monitoring Time" in "Safety
Communication Setting" under "Application Settings" correct?
Is the setting value of "Safety Refresh Monitoring Time" in "Safety
Communication Setting" under "Application Settings" correct?
Does safety station interlock status indicate interlock state?
Is a standard station set for the station No. of the communication destination in
"Safety Communication Setting" under "Application Settings"?
Is "Safety Data Transfer Device Setting" in "Safety Communication Setting"
under "Application Settings" correctly set?
When safety communications are performed with the remote device station
(safety station), is "RWw/RWr Setting" set to 15 points or less in "Network
Configuration Settings" of "Basic Settings"?
Has a cyclic transmission stop been executed on the master station?
When safety communications are performed with the remote device station
(safety station), has the safety module validation been performed?
Is the safety communication function used in a system containing the
submaster station?
If the above actions do not solve the problem, perform the following tests to check for an error.
• Communication test (Page 38 Communication test)
Action
Cancel the setting of the reserved station (safety station). (Page 67
Network Configuration Settings)
In "Safety Communication Setting" under "Application Settings", set the
station No., station type, and model name set in "Network Configuration
Settings" under "Basic Settings" of the master station.
Set safety connection among safety stations that perform safety
communications in "Safety Communication Setting" under "Application
Settings".
Set one of the safety stations "Active" and the other "Passive" in "Safety
Communication Setting" under "Application Settings".
Correct the setting value of "Sending Interval Monitoring Time" in "Safety
Communication Setting" under "Application Settings". (Page 175
Transmission interval monitoring time)
Correct the setting value of "Safety Refresh Monitoring Time" in "Safety
Communication Setting" under "Application Settings". (Page 176 Safety
refresh monitoring time)
• Correct the setting value of "Sending Interval Monitoring Time" in "Safety
Communication Setting" under "Application Settings". (Page 175
Transmission interval monitoring time)
• Correct the setting value of "Safety Refresh Monitoring Time" in "Safety
Communication Setting" under "Application Settings". (Page 176
Safety refresh monitoring time)
• Release the interlock state by using interlock release request for each
safety connection. (MELSEC iQ-R CPU Module User's Manual
(Application))
Set a safety station for the station No. of the communication destination in
"Safety Communication Setting" under "Application Settings".
Correct "Safety Data Transfer Device Setting" set in "Safety Communication
Setting" under "Application Settings" among safety stations that perform
safety communication.
Set "RWw/RWr Setting" to 16 points in "Network Configuration Settings" of
"Basic Settings".
Restart the stopped cyclic transmission. (Page 117 Link Start/Stop)
Perform the safety module validation. (Manual for the remote device
station used)
Review the system configuration and use the safety communication function
in a system not containing the submaster station.
4.4 Troubleshooting by Symptom
4 TROUBLESHOOTING
129
4