Specifying The Error Status Read Device - Mitsubishi Electric QJ71MB91 User Manual

7
PARAMETER SETTING

7.3.4 Specifying the error status read device

Users can specify the data to be read out as an exception status when the QJ71MB91
(slave) receives Read Exception Status (FC:07) from the master.
Programmable QJ71MB91 (Slave function)
controller CPU
No sequence
program required
Error status read device specification
Device
Device memory
M100
01H
M100 to M107
M107
Figure 7.11 Relations between error status and error status read device
(1) To specify the error status read device
Specify a read target device to the addresses shown below.
The 8 points from the specified bit device is regarded as a error status read device.
Address
000A
H
(10)
Error status read device specification
000B
H
(11)
Request message
(Sends Read Exception Status (FC:07))
Exception
status
Receives response message (exception status 01H)
RS-232, RS-422 or RS-485
Table7.10 Error status read device specification
Parameter name
Device code
Head device number
7.3 MODBUS Device Assignment Parameter
7.3.4 Specifying the error status read device
Setting range
0000 : Device code not assigned
H
Other than 0000 : Device code
H
0000 to FFFF
H H
1
2
MODBUS
Master device
3
4
5
Default
F000
H
6
0000
H
7
8
7
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