Safety Response Time; Monitoring Time For Safety Communications - Mitsubishi Electric MELSEC iQ-R Series User Manual

Safety response time

The safety response time is the maximum value of the time between a safety input of the remote station (safety station)
turning off and a safety output of the remote station (safety station) turning off (including an error detection time).
For calculation method of the safety response time, refer to the following.
 Mitsubishi Safety Programmable Controller MELSEC iQ-R Series Machinery Directive (2006/42/EC) Compliance

Monitoring time for safety communications

The following shows the monitoring time for safety communications.
Set the monitoring time for each safety connection. If the time exceeds the monitoring time, a safety communication timeout
will be detected, resulting in stop of the safety communication.
Station to Item
be set
Master Transmission interval
station monitoring time
Safety refresh monitoring
*1
time
Device Transmission interval
station monitoring time
*1 The master station and device station use a common value as the safety refresh monitoring time.
Master station Device station
Ò
Ó
(1) Safety data to be sent from the master station to a device station
(2) Safety data to be sent from a device station to the master station
 to : Intervals at which safety data is exchanged
Description
• The device station monitors the interval  at which the master station sends
safety data.
• The master station sends data to a device station when the safety communication
starts.
• The time information at the time of sending that is added to the safety data
received by the device station is compared with the previous value and monitored.
The master station monitors the interval  at which safety data is received from the
device station.
• The device station monitors the interval  at which safety data is received from
the device station.
• The master station sends data to a device station when the safety communication
starts.
• The master station monitors the interval  at which the device station sends
safety data.
• The device station sends data to the master station when the safety
communication starts.
• The time information at the time of sending that is added to the safety data
received by the master station is compared with the previous value and monitored.
: (1)
: (2)
Ô
Õ
Station using the
set time
Device station
Master station
Device station
Master station
APPX
Appendix 6 Processing Time
A
295