Omron E5C User Manual page 342

A Appendices
Timing Status
During Output will not turn ON
operation
(continued)
Temperature Controller
will not operate
Temperature error is large
Input error (S.err display)
Keys will not operate
Cannot shift levels
After long Control is unstable
service life
* The specified torque is 0.5 N·m for the E5CC-U.
A - 16
Meaning
Set to STOP (default: Set the RUN/STOP mode to RUN. If STOP is lit on the
RUN) display, control is stopped.
Specified operation is Select either forward or reverse operation depending on
unsuitable for required the required control. Reverse operation is used for heating
control (default: Reverse operations.
operation).
A high hysteresis is set Set a suitable value for the hysteresis.
for ON/OFF operation
(default: 1.0°C)
The specified power is The output will not turn ON while the Digital Controller is
not being supplied from being operated with power supplied through the
the terminals. USB-Serial Conversion Cable. Supply the specified power
from the terminals.
Set to STOP (default: Set the RUN/STOP mode to RUN. If STOP is lit on the
RUN) display, control is stopped.
Thermometer has burnt Check whether the thermometer has burnt out or
out or short-circuited. short-circuited.
Thermometer lead wires Wire the lead wires and power lines in separate conduits,
and power lines are in the or wire them using a more direct path.
same conduit, causing
noise from the power
lines (generally, display
values will be unstable).
Connection between the Connect the thermocouple's lead wires directly, or connect
Digital Controller and compensating conductors that are suitable for the
thermocouple is using thermocouple.
copper wires.
Installation location of Make sure that the location that is being measured with
thermometer is the temperature sensor is suitable.
unsuitable.
Input shift is not set Set a suitable input shift. If input shift is not required, set
correctly (default: 0°C) the input shift value to 0.0.
Setting change protect is Turn OFF setting change protect.
ON.
Operations limited due to Set the operation/adjustment protect, initial
protection. setting/communications protect, and setting change
protect values as required.
Terminal screws may be Retighten terminal screws to a torque of 0.43 to 0.58
loose. N·m.*
The internal components The Digital Controller's internal electrolytic capacitor
have reached the end of depends on the ambient temperature, and load rate. The
their service life. structural life depends on the ambient environment
(shock, vibration). The life expectancy of the output relays
varies greatly with the switching capacity and other
switching conditions. Always use the output relays within
their rated load and electrical life expectancy. If an output
relay is used beyond its life expectancy, its contacts may
become welded or burned. Replace the Digital Controller
and all other Digital Controllers purchased in the same
time period.
Countermeasures
E5@C Digital Temperature Controllers User's Manual (H174)
Page
5-12
4-15
4-21
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