Slave Station Cut-Off Function - Mitsubishi Electric MELSEC QS Series User Manual

4
FUNCTIONS

4.2.6 Slave station cut-off function

When a remote station becomes incapable of continuing data link due to a reason such as
power-off or a safety monitoring timeout error, this function disconnects that remote station
only, allowing the other normal stations to continue the data link.
Safety refresh
Measuring time
monitoring timer
Safety master station
Safety remote station
4
- 18 4.2 Detailed Explanation of Functions
4.2.6 Slave station cut-off function
Safety
master
station
Terminating
resistor
[About the safety monitoring timeout error]
If no signal has been normally received from a safety remote station for the period of
the safety refresh monitoring time or longer, a safety monitoring timeout error is
detected. If this occurs, the safety master station disconnects only the relevant
safety remote station, and CC-LINK DATA RECEPTION TIMEOUT (Error code 8320
to 8329) is stored in the error history of the safety CPU module.
Measuring time
Normal reception Normal reception
Down
Remote
Remote
station
station
Terminating
resistor
Continues data link excluding faulty stations.
Safety refresh monitoring time
Measuring time
Data error
Safety monitoring
timeout error
occurred.
Safety master station
Data error
stops data link with
the target station.