Omron CP1H CPU Operation Manual page 487

DeviceNet I/O Link Units
Handling Unit Errors
Operating Procedure
LED Indicators
Indicator Color Status
MS Green Lit
Flashing
Red Lit
Flashing
--- OFF
NS Green Lit
Flashing
Red Lit
Flashing
--- OFF
If a communications error occurs while the slave is on standby, the appropri-
ate bit in word A436 will turn ON. The appropriate bit is determined by the
order in which the Expansion Units and Expansion I/O Units are connected.
The Unit nearest to the CPU Unit uses A436.00. Use these flags in the pro-
gram when it is necessary to detect errors.
Connect the Unit.
Determine the node
number of the DeviceNet
I/O Link Unit and set the
rotary switches.
Wire the DeviceNet
transmission path.
Condition
Normal status
Not set
Fatal error
Nonfatal error
Power not supplied.
Online and commu-
nications estab-
lished.
Online and commu-
nications not estab-
lished.
Fatal communica-
tions error
Nonfatal communi-
cations error
Online and power
OFF.
• Connect the DeviceNet I/O Link Unit.
• The node number should be a unique number between
0 and 63.
• Use the DIP switch to set the DeviceNet I/O Link Unit fs
baud rate and the status of output data when a
communications error occurs.
• Connect the DeviceNet I/O Link Unit to a DeviceNet
transmission path.
Section 7-7
Meaning
• Normal status
• Switch settings being read
• Fatal hardware error
(watchdog timer)
• Incorrect switch settings.
• Power not supplied.
• Waiting for initialization to
start.
• Reset in progress.
• Network normal and com-
munications established.
• Network normal and com-
munications not estab-
lished.
Unit has detected network
status preventing normal
communications.
• Node number duplications
• Bus OFF detected.
• Communications timeout
or communications error
for one or more slaves.
Waiting for node number
check by master.
• Switch setting error.
• Power not supplied.
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