Mitsubishi Electric MELSEC-Q Series User Manual page 385

(b) Local station  master station
The time between a local station issuing an instruction and it receiving a response from the master station is
calculated as follows.
[Formula]
<Maximum value>
• G(P).RIRD instruction
OT + LS × [BC + {(number of read points + 16)  72}
+ (WT × RT × 1000)
OT: Processing time of QCPU dedicated instructions
Basic model QCPU, Q02CPU: 1ms
QCPU (excluding a Basic model QCPU and Q02CPU): 0.5ms
LS:
Link scan time (
BC: Constant
Transmission
156kbps
speed
BC
SM: Master station sequence scan time (Apply "0" when buffer memory data in CC-Link is read.)
WT:
Monitoring time set in SW0009 (
RT:
Number of retries set in SW000B (
When the CPU module is a Q06HCPU, transmission speed is 10Mbps, link scan time is 5ms, the number
Ex.
of read points is 20 words (buffer memory in CC-Link), monitoring time is 10 seconds, and the retry is not
set
OT + LS × [BC + {(number of read points + 16)  72}
= 0.5 + 5 × [12 + {(20 + 16)  72}
= 0.5 + 5 × [12 + {1 × 1.13}] + 0
= 66.15
= 66.2ms
*1 The decimal point is rounded up.
*2 Time that occurs when a dedicated instruction is retried
*2
ms
Page 366, Appendix 4.1)
625kbps
6 7
Page 351, Appendix 3.2)
*1
× 1.13] + 0 + (10 × 0 × 1000)
*1
× 1.13] + SM
2.5Mbps 5Mbps
9 11
Page 351, Appendix 3.2)
*1
× 1.13] + SM + (WT × RT × 1000)
APPENDICES
A
10Mbps
12
383