App - 4 App - 4
MELSEC-Q
APPENDICES
(2) Slave function performance
1) Request message processing time [Unit: ms]
The request message processing time is the time from when the
QJ71MT91 receives a request message from the master until it sends
a response message after completion of processing.
Tsl 5 + 7 n1 + St n2
2) Calculation items
Setting Item
Description
Unit
Tsl
Request message processing time
ms
St
Local station scan time
ms
Any of the following values is applied depending on the
function code and assignment status.
Function code
When programmable
controller CPU device
is assigned
When buffer memory
is assigned
01 1
0
02 1
0
03 1
0
04 1
0
05 1
0
06 1
0
15 1
0
16 1
0
20 1
0
21 1
0
22 2
0
n1
23 2
0
Any of the following values is applied depending on the
function code and assignment status.
When programmable
controller CPU device
is assigned
Function code
Normal
case
Worst
case
When buffer memory
is assigned
01 1 2
0
02 1 2
0
03 1 2
0
04 1 2
0
05 1 2
0
06 1 2
0
15 1 2
0
16 1 2
0
20 1 2
0
21 1 2
0
22 2 4
0
n2
23 2 4
0
