Mitsubishi Electric MELSEC iQ-R Series Safety Manual page 247

■Calculation example of the transmission interval monitoring time of the CC-Link IE Field
Network
Transmission interval monitoring time is used for calculation of the CC-Link IE Field Network transmission time.
<Transmission interval monitoring time between MELSEC iQ-R series CC-Link IE Field Network master/local modules>
According to Page 243 Transmission interval monitoring time of the CC-Link IE Field Network, all calculation formulas in (1) to
(2) below must be satisfied. Set this in increments of 0.1ms.
(1) Transmission interval monitoring time  SCown  3 = 3  3 = 9  9 [ms]
(2) Transmission interval monitoring time  SCoth  2 + LS  2 = 3  2 = 0.85  2 = 7.7 [ms]
SCown: Safety cycle time of the master station
SCoth: Safety cycle time of the communication destination
LS: Link scan time
Therefore, set the transmission interval monitoring time of the CC-Link IE Field Network master/local module to 9ms.
<Transmission interval monitoring time between the master station of MELSEC iQ-R series CC-Link IE Field Network master/
local module and the safety remote I/O module>
According to Page 243 Transmission interval monitoring time of the CC-Link IE Field Network, all calculation formulas in (1) to
(4) below must be satisfied. Set this in increments of 0.1ms.
• CC-Link IE Field Network master/local module (Set the time in increments of 0.1ms.)
(1) Transmission interval monitoring time  SCown  3 = 3  3 = 9  9 [ms]
(2) Transmission interval monitoring time  SRref  2 + LS  2 = 2  2 + 0.78  2 = 5.56  5.6 [ms]
• Safety remote I/O module (Set the time in increments of 1ms.)
(3) Transmission interval monitoring time  SRref  2 = 2  2 = 4 [ms]
(4) Transmission interval monitoring time  SCmst  2 + LS  2 = 3  2 + 0.78  2 = 7.56  8 [ms]
SCown: Safety cycle time of the master station
SCoth: Safety cycle time of the communication destination
SCmst: Safety cycle time of the master station
SRref: Safety remote station refresh response processing time
LS: Link scan time
Therefore, set the transmission interval monitoring time of the CC-Link IE Field Network master/local module to 9ms. Set the
transmission interval monitoring time of the safety remote I/O module to 8ms.
Appendix 2 Calculating Safety Response Time for System Connected to Multiple Safety CPUs
A
APPX
245