Omron NJ501-1320 - Page 221

5-41
5 Troubleshooting
NJ-series CPU Unit Hardware User’s Manual (W500)
5-2 Troubleshooting
5
5-2-4 Error Descriptions
Event name Battery-backup Memory Check Error Event code 10090000 hex
Meaning An error was detected in the memory check of the battery-backup memory in the CPU Unit.
Source PLC Function Module or Motion Con-
trol Function Module
Source details PLC Function
Module: None
Motion Control
Function Mod-
ule: MC Common
Detection
timing
At power ON or
Controller reset
Error attributes Level Minor fault Recovery Error reset Log category System
Effects User program Continues. Operation The variables with a Retain attribute and memory for CJ-
series Units in the DM, EM, and Holding Areas were cor-
rupted. Normal user program execution or normal Unit
operation may not be possible.
System-defined
variables
Variable Data type Name
_RetainFail BOOL Retention Failure Flag
Cause and
correction
Assumed cause Correction Prevention
The battery voltage is low. Replace the Battery. Regularly replace the Battery.
The battery connector has come
loose.
Reconnect the connector and make
sure it is mated correctly.
Check for vibration and shock.
The Battery is missing. Install a Battery. Install a Battery.
Attached
information
None
Precautions/
Remarks
After you implement the above countermeasures, set the correct data for the variables with a Retain attribute and
memory for CJ-series Units in the DM, EM, and Holding Areas. You can change the event level to the observation
level. If you change the level to the observation level, recovery procedures are not required.
Event name SD Memory Card Invalid Type Event code 000F0000 hex
Meaning The current SD Memory Card is not supported.
Source PLC Function Module Source details None Detection
timing
At power ON, at
Controller reset,
or when SD
Memory Card is
inserted
Error attributes Level Observation Recovery --- Log category System
Effects User program Continues. Operation SD PWR indicator is not lit. Power supply to SD Memory
Card is stopped.
System-defined
variables
Variable Data type Name
_Card1Ready BOOL SD Memory Card Ready Flag
Cause and
correction
Assumed cause Correction Prevention
An SD Memory Card that is not sup-
ported was inserted into the CPU
Unit.
Replace with an HMC-SD291 SD
Memory Card or an HMC-SD491 SD
Memory Card.
In the following case, replace with an
HMC-SD491 SD Memory Card.
• The NJ501- CPU Unit with
the hardware revision A and unit
version 1.15 or later.
Use an HMC-SD291 SD Memory
Card or an HMC-SD491 SD Memory
Card.
In the following case, use an HMC-
SD491 SD Memory Card.
• The NJ501- CPU Unit with
the hardware revision A and unit
version 1.15 or later.
Attached
information
Attached information 1: “Not UHS-I” is displayed when the SD Memory Card does not support UHS-I.
Precautions/
Remarks
None