Mitsubishi Electric MELSEC iQ-R Series Safety Manual page 243

■Calculation example of the safety data transmission time (maximum value)
The safety data transmission time (maximum value) is a transmission time of the CC Link IE Field Network from safety input
to safety output.
The safety data transmission time (maximum value) = (SCcpu  3) + (SRref  4.5) + (RM  2) + SRin + SRout + (n  4) = 3 
3 + 2  4.5 + 11.8  2 + 1.4 + 0.4 + 1.8  4 = 50.6
SCcpu: Safety cycle time of the Safety CPU
SRref: Safety remote station refresh response processing time
RM: Safety refresh monitoring time ( Page 240 Calculation example of safety refresh monitoring time on CC-Link IE Field Network)
SRin: Input response time of the safety remote I/O module
SRout: Output response time of the safety remote I/O module
n: This shall be 1.8, since it is (1) or (2) below, whichever smaller.
(1) RM - TMmst - (TMrmt  2) + a = 11.7 - 9 - (7.8  2) + (9 - 6) = 1.8
(2) RM - (TMmst  2) - TMrmt + c = 11.7 - (9  2) - 7.8 + (7.8 - 4) = 3.2
TMmst: transmission interval monitoring time of master station ( Page 240 Calculation example of CC-Link IE Field Network transmission interval
monitoring time)
TMrmt: transmission interval monitoring time of safety remote I/O module ( Page 240 Calculation example of CC-Link IE Field Network transmission interval
monitoring time)
a: If a station set to active side is the RJ71GF11-T2, then a = TMmst - b. For other cases, a = 0.
b: Value rounds up the calculation results of the TMmst  2
c: If a station set to passive side is either the RJ71GF11-T2 or Z2GFSS2-32D, then c = TMrmt - d For other cases, c = 0.
d: Value rounds up the calculation results of the TMrmt  2 to a multiple of the safety cycle time of the local station (if NZ2GFSS2-32D, safety refresh response
processing time)
Calculation example of safety response time maximum value
The following is the calculation example of safety response time (maximum value)
Safety response time (maximum value) = DT1 + DT2 + Safety data transmission time = DT1 + DT2 + 50.6 [ms]
Appendix 1 Calculating Safety Response Time for System Configured with a Safety CPU
A
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