Mitsubishi QJ71MB91 User Manual page 362

APPENDICES
App
- 10 Appendix 3 Processing Time
(2) Performance of the slave function
Request
Master
message
Slave
(QJ71MB91)
Ti
FigureApp.2 Processing time configuration of the slave function
(a) When mounted with a programmable controller CPU
1) Request message processing time [unit: ms]
The request message processing time is the time from when the QJ71MB91
receives a request message from the master until it sends a response
message after completion of the requested processing.
Tsl = Ttq + Ta + Ks1 + Ks2
2) Calculation items
TableApp.10 Processing time calculation items used when mounted with a programmable
Item
Tsl
St
Ks1
Ks2
Ta
Ttq
Ttr
Ti
Gt
Request
Processing
message
time
QJ71MB91+CPU
Processing time
(Ta+Ks1+Ks2 n1+St n2)
Ttq Ti
Tsl
n1 + St
controller CPU
Request message processing time
Local station scan time
6 (Constant)
8 (Constant)
Message conversion time
RTU mode : 0
ASCII mode : 1 to 2
Request message transmission time
Response message transmission time
Message interval
RTU mode:
When the transmission speed is 19200 bps or less, "1
*3
character time 3.5"
When the transmission speed exceeds 19200 bps, "1.75ms"
ASCII mode: 0
Data transmission delay time
RS-232 : 0 ms
RS-422/485: 1 character time
Response
message
Ttr
Gt Ti
n2 +Ttr + Ti 2 + Gt
Description
*1
*2
*3
2
Unit
ms
ms
-
-
ms
ms
ms
ms
ms
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