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Errors in Remote I/O Communications
The following indicator patterns show that an error related to the CompoNet network has occurred.
Errors can basically be identified by the NS indicator flashing red and the seven-segment display show-
ing "d*."
MS
NS
✳
---
Red
5
✳
---
Red
✳
---
Red
✳
---
Red
✳
---
Red
Indicators:
5 - 3
Seven-
Probable cause of
segment
Item
display
d9
Communicati
A Slave Unit
↓
ons error
disconnection was
yy
detected.
↓
zzz
d0
Address
An address duplication
↓
duplication
error was detected for a
yy
error
Slave Unit attempting to
↓
participate. Or, an error
zzz
was detected in Slave
Unit communications.
E5
Illegal
It was detected that the
Configuration
Slave Units and
Error
Repeater Units
requesting to participate
in the network exceeded
the permitted number of
Repeater Unit segments
(two).
d5
Verification
It was detected that a
↓
error,
Slave Unit registered in
yy
nonexistent
the registration table is
↓
Slave Unit
not participating within a
zzz
fixed time after power is
turned ON to the
Gateway Unit.
d6
Verification
Participation of an
↓
error,
unregistered Slave Unit
yy
unregistered
was detected.
↓
Slave Unit
zzz
❍
✳
●
: Lit,
: Flashing,
: Not lit,
Unit operation after error
error
detection
System operations continue.
Participation of the
disconnected Slave Unit is
awaited.
When the cause of the error
is removed, normal operation
is restored. (The NS indicator
lights green.)
The duplication error is
registered in the error history.
System operations continue.
Subsequent Slave Unit
participation is prohibited
from the point where it is
detected that the permitted
number of Repeater Unit
segments has been
exceeded in the participation
processing.
Other system operations
continue.
After normal status is
restored, the Unit recovers
when it is restarted.
System operations continue,
and remote I/O operations
start. Participation of the
Slave Unit where the error
occurred continues to be
monitored. When Slave Unit
participation is completed,
normal status is restored.
(The NS indicator lights
green.)
All other system operations
continue without allowing the
participation of the
unregistered Slave Unit.
Recovery is attained by
restoring normal status and
restarting the Unit.
: Not applicable
---
CompoNet Gateway Unit for CC-Link Operation Manual
Countermeasures
Either of the following may be the cause
of the error.
1.
Communications had to be
continually retried for the applicable
Slave Unit due to noise, until the
specified number of retries was
exceeded.
2.
Responses to communications from
the Gateway Unit are not possible
because of a malfunction, line
disconnection, or communications
power supply interruption at the
Slave Unit itself.
Inspect the Slave Unit where the
disconnection was detected, and remove
the cause of the error. There is no need to
restart the Gateway Unit.
A Slave Unit or Repeater Unit in the same
network is set for the same node.
Use the following procedure:
1.
Turn OFF the power to the Gateway
Unit and the Slave Unit.
2.
Change the duplicate node number
to the correct value.
3.
Turn ON the power to the Gateway
Unit and the Slave Unit.
If the error persists, it is safe to assume
that a communications error caused the
problem. Check for noise entering the
network, disconnected cables, and loose
connectors or signal wires, and make
sure the network is installed according to
specifications.
The maximum number of Repeater Unit
segments is registered to two in the
Gateway Unit and cannot be changed.
This error thus indicates that there are
three or more Repeater Unit segments.
Correct the wiring and restart the
Gateway Unit.
If the error does not clear, check the Slave
Unit that is not participating.
Check and correct the status of the
unregistered Slave Unit, and then restart
the Gateway Unit.
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Troubleshooting
