Mitsubishi QJ71MB91 User Manual page 134

5
FUNCTIONS
Programmable
controller CPU
No sequence
program required
Device
M100
to
01
H
M107
Figure 5.14 Error status read device and programmable controller CPU device
5
- 19 5.3 Slave Function
5.3.2 MODBUS(R) device assignment function
(b) 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.( Section 7.3.4)
QJ71MB91 (Slave function)
Error status read device specification
Device memory
Exception
M100 to M107
status
RS-232, RS-422 or RS-485
(c) Specifying access target when mounted to MELSECNET/H remote I/O station
For the case where the QJ71MB91 is mounted to a MELSECNET/H remote I/O
station, the access target can be specified.(
The access target can be selected from the MELSECNET/H remote master
station and the MELSECNET/H remote I/O station.
Request message
(Sends Read Exception Status (FC:07))
Receives response message (exception
status 01 )
H
MODBUS
Master
device
Section 7.3.5)
R