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MELSEC-Q
3 SPECIFICATIONS
(19) Slave Function Communication Status (address 0600
H
/1536)
These addresses indicate the I/O communication status of the QJ71DN91 slave
function. The values listed in Table 3.24 are stored according to the status of
communication.
Table 3.24 I/O communication status of the slave function
Value Name Operation
0000
H
Offline Initialization in progress, bus-off, network power OFF
0040
H
Stop I/O communication being stopped
0080
H
Ready Waiting to establish the connection from the master node
00C0
H
Operate I/O communication in progress
When the power is turned ON, the status of the slave function automatically
changes from Offline to Stop if the auto communication start setting in the buffer
memory address 0631
H
is 0. The status automatically makes 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, then makes transitions from Offline to Operate.
However, if the connection is not assigned from the master node, the status
becomes Ready and cannot make a transition to Operate.
Offline
Stop
Ready
Operate