Safety Master Station Standard Remote I/O Station - Mitsubishi Electric MELSEC QS Series User Manual

5
DATA LINK PROCESSING TIME AND STATION
STATUS AT ERROR OCCURRENCE
5.2.2 Safety master station
(1) Safety master station (RX)
5
- 11 5.2 Transmission Delay Time

5.2.2 Safety master station Standard remote I/O station

The following indicates the time from the moment a signal is input to a standard
remote I/O station until a device of the safety CPU module turns ON (or OFF).
[Calculation formula]
[Normal value]
(a) Synchronous mode
(SM n) 1 + Remote I/O station input response time
• SM:Sequence scan time of safety CPU module
• LS :Link scan time (Refer to Section 5.1.)
• n :(LS/SM) value that is rounded up to the nearest whole number
(Example) When the sequence scan time of the safety CPU module is 20ms,
the link scan time is 3ms, and the remote I/O station response time is
20ms:
(SM
= (20
= 40 [ms]
(b) Asynchronous mode
SM + LS 1 + Remote I/O station input response time
• SM:Sequence scan time of safety CPU module
• LS :Link scan time (Refer to Section 5.1.)
(Example) When the sequence scan time of the safety CPU module is 10ms,
the link scan time is 3ms, the safety refresh response processing
time is 9.6ms, and the safety remote I/O station input response time
is 12ms:
SM + LS
= 20+3
= 43 [ms]
Standard remote I/O station
Standard remote I/O station (input)
n) 1 + Remote I/O station response time [ms]
1) 1 + 20
1 + Remote I/O station response time [ms]
1+20
*1
[ms]
*1
[ms]