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3 SPECIFICATIONS
3.4.8 Own node status area for slave function
3 - 40
This area stores the communication status, error information, etc. of the slave function.
(1) Slave Function Communication Status (address: 0600
The I/O communication status of the slave function is stored.
Table 3.27 Slave function communication status
Value
Name
0000
Offline
H
0040
Stop
H
0080
Ready
H
00C0
Operate
H
(a)
When "No start" is set for Auto Communication Start Setting (address:
0631
)
H
Upon power-up, the status automatically changes from Offline (0000
Stop (0040
When I/O Communication Request (Y11) is set to ON, the status changes
to Operate (00C0
Note that, until receiving an I/O communication request from the master
node, the module is placed in Ready status (0080
(b)
When "Start" is set for Auto Communication Start Setting (address: 0631
Upon power-up, the status automatically changes from Offline (0000
Operate (00C0
Note that, until receiving an I/O communication request from the master
node, the module is placed in Stop status (0040
(c)
When a reset message is received through the network
The status automatically returns to Offline (0000
Operate (00C0
(2) Error Information for Slave Function (address: 0601
A code for a communication error occurred in the slave function is stored.
For error notification and a clearing method of this area, refer to Section 3.3.3 (4).
(a)
High byte
An error code is stored. (Refer to Section 9.2.1.)
(b)
Low byte
The number of the node (MAC ID), where an error occurred, is stored.
FE
, FF
(254, 255): Own node (QJ71DN91)
H
H
0
to 3F
(0 to 63): Node No. (MAC ID) of the node where an error
H
H
occurred.
Initialization in progress, bus-off, or network power OFF
I/O communication stopped
Waiting to establish a connection from the master node
I/O communication in progress
).
H
).
H
).
H
).
H
MELSEC-Q
/1536)
H
Operation
H
).
H
H
).
H
), and then changes to
H
/1537)
H
3 - 40
) to
)
H
) to
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Troubleshooting
