Mitsubishi Electric MELSEC QS Series User Manual page 73

5
DATA LINK PROCESSING TIME AND STATION
STATUS AT ERROR OCCURRENCE
[Maximum value]
(a) Synchronous mode
(b) Asynchronous mode
(SM n) 2 + Remote device station processing 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 device station processing
time is 20ms:
(SM n)
= (20 1)
= 60 [ms]
SM + LS 2 + Remote device station processing 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 20ms,
the link scan time is 3ms, and the remote device station processing
time is 20ms:
SM + LS
= 20 + 3 2 + 20
= 46 [ms]
* 1 For the remote device station processing time, refer to the manual of the relevant remote device
station.
5.2 Transmission Delay Time
5.2.3 Safety master station Remote device station
2 + Remote device station processing time [ms]
2 + 20
2 + Remote device station processing time [ms]
*1
[ms]
*1
[ms]
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