Dealing With Abnormalities; System Errors; Warning Code; Noise - Omron V600-CA8A-V Series Operation Manual

Dealing with Abnormalities

6-3-2 System Errors

Error Name
code
90 Power
disconnection
during command
processing
91 Power
disconnection
during write
processing
92 CPU abnormality
93 Memory
abnormality

6-3-3 Warning Code

Warning
code
7B DC battery low
6-4

Dealing with Abnormalities

6-4-1 Noise

No. Problem conditions
1 Occurs with large capacity
motor, transformers, or
capacitors when power is
applied.
2 Occurs irregularly
3 Mis-operation such as
turning input signal on
when it is off
Error
message
P OFF CMD Power is disconnected during command
execution.
P OFF WT Power was disconnected during
execution of a write or auto write
operation.
CPU E There may an influence of noise due to an abnormality in the ID Controller.
Turn off the power and apply it once again.
C.NEM E
Turn reset input on. (If normal operation cannot be restored, use a
replacement.)
System error (operation termination error) data can be checked on the Monitor
Unit, but cannot be checked on the PC.
Name
The voltage of the DC's built-in battery is low.
Note 1. These warnings are not recorded by the ID Controller.
2. If a DC communications error (with an error code of 70) or disagreement er-
ror (with an error code of 71) occurs while writing data, all or part of the data
object address data may have been replaced. The data that may have been
replaced will not always be the data for the write instruction. If a DC commu-
nications error or disagreement error occurs, execute retry processing from
the host side until no error occurs. The data in other addresses will not be
influenced at all.
The following three problems are usual causes of problems in the ID Controller.
• Noise. Take countermeasures to deal with noise.
• Breakdowns in external equipment, in which case repairs are required.
• ID Controller breakdown, in which case repairs are required.
When system mis-operation occurs due to noise, refer to the following table to
take appropriate countermeasures to eliminate the influence of noise.
Probable cause
Instantaneous
voltage drop in
power supply
system due to
large-scale load
surge current
Common mode
noise due to above
cause
Noise on power
lines
Induced noise in
input wiring
Description and cause
Description
Action
There exists an abnormality in communications between
R/W Heads and DCs. Check communications speed,
distance, and obstacles.
Supply power via a 1:1 non-grounded insulated transformer.
Avoid common grounds with other large-scale loads, and
ground the ID Controller independently.
Supply power via a 1:1 non-grounded insulated transformer
or a noise filter.
Lay input signal grounds away from other power lines.
If noise effects are large, insert inside metal line pipes or
use shielded cables.
Section
After applying power once
again, execute the command
again.
6-4
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