2.1 CPU Module
2.1.5 Temperature Sensor
2-10
2.1.5
Temperature Sensor
A temperature sensor is built into the CPU Module.
The temperature sensor constantly monitors for abnormal temperatures in the CPU Module. If a
temperature error is detected, an alarm is displayed on the CPU Module.
There are four levels of alarms, as shown in the following table.
Display
ALM Indi-
cator
Error Description
A.241
Lit
A rise in the internal temperature was detected.
E.081
Lit
The temperature continued to increase after A.241 was detected and is
approaching the permissible temperature of the internal parts.
(The CPU Module will stop.)
E.082
Lit
The temperature continued to increase after E.081 was detected and
has reached the permissible temperature of the internal parts.
(The CPU Module will stop.)
h
Lit
The failsafe function was activated for E.082 (Temperature Warning).
(The CPU Module will stop.)
(This alarm is displayed if the temperature continues to increase after
E.082 was detected.)
If any one of the above alarms occurs, take the following actions.
•
A.241: Check the ambient environment and installation conditions.
If you are using natural cooling for the control panel, we recommend that you change to
forced-air cooling.
•
E.081, E.082, or h: Turn OFF the power supply to the Machine Controller immediately and
check the ambient environment and installation conditions.
Refer to the following section for details on the ambient environment and installation require-
ments.
4.1 Installation and Usage Conditions
Important
