Mitsubishi QJ71DN91 User Manual page 49

3 SPECIFICATIONS
Bit 7
These problem occurred when the
corresponding bits were ON.
3 - 32
(4) Master Function Communication Status (address 01B0
The higher and lower bytes indicate the following master communication status:
(a) Higher byte
This byte indicates the I/O communication status of the QJ71DN91 master
function. The values in Table 3.16 are stored according to the
communication status.
Value
00
H
40
H
C0
H
When the power is turned ON, the status of the master function automatically
changes from Offline to Stop if the auto communication start setting in the
buffer memory address 0631
transitions from Offline to Operate if the setting is 1.
If a reset message is received from the DeviceNet network, the status
automatically returns to Offline and makes transitions from Offline to Operate.
(b) Lower byte
This byte indicates the network's communication status. Each bit is turned
ON/OFF as follows, according to the communication status.
Bit 6 Bit 5 Bit 4 Bit 3
Always sets to OFF.
Table 3.16 I/O communication status
Name
Offline
Stop
Operate
is 0. The status automatically makes
H
Offline
Stop
Operate
Bit 2 Bit 1 Bit 0
Always sets
to OFF.
Operation
Being initialized
I/O communication being stopped
I/O communication in progress
There is a station with
a communication error.
Parameter error
Network has a fatal problem
and communication cannot be
continued.
MELSEC-Q
/432)
H
3 - 32