Communication protocols
PROGRAMMING MANUAL
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4.5.3
Communication Status
TJ1-DRT can provide status information to both the TJ2-MC64 and the
DeviceNet master. You can retrieve the status information in BASIC with the
command DeviceNet (unit_number,4,0). The result provides the following
information:
/i
You can retrieve the status information in the DeviceNet master by selecting
a connection path that includes status information. The status information
includes one bit. Bit 2 indicates that the network voltage has dropped below
the level set in the TJ1-DRT DeviceNet parameters. You can set the TJ1-
DRT DeviceNet parameters using a DeviceNet configurator. The default
level is 11V.
Bit
Value
Description
0
0
DeviceNet (unit_number, 2, ...) not executed yet
1
DeviceNet (unit_number, 2, ...) executed without error
1
0
No DeviceNet I/O connection
1
DeviceNet I/O connection running
2
0
VR variables in the output data range have been updated
1
VR variables in the output data range have not been updated yet
3
0
DeviceNet I/O connection size matches the Device-
Net(unit_number,2,…) command
1
DeviceNet I/O connection size does not match the Device-
Net(unit_number,2,…) command
4-7
0
Always zero
8
0
Network power OK
1
Network power failure
9
0
No BUSOFF occurred
1
BUSOFF occurred
10
0
No node address duplication error
1
Node address duplication error
11-
0
Reserved