A Appendices
A - 10
Digital Temperature Controllers (Simple Type) User’s Manual (H211)
Timing Status Meaning Countermeasures
During
operation
(continued)
Output will not turn ON Set to STOP (default: RUN) Set the RUN/STOP mode to RUN. If STOP is lit on the display,
control is stopped.
Specified operation is
unsuitable for required control
(default: Reverse operation).
Select either forward or reverse operation depending on the
required control. Reverse operation is used for heating
operations.
A high hysteresis is set for
ON/OFF operation (default:
1.0°C)
Set a suitable value for the hysteresis.
Temperature Controller
will not operate
Set to STOP (default: RUN) Set the RUN/STOP mode to RUN. If STOP is lit on the display,
control is stopped.
Temperature error is large
Input error (S.err display)
Thermometer has burnt out or
short-circuited.
Check whether the thermometer has burnt out or
short-circuited.
Thermometer lead wires and
power lines are in the same
conduit, causing noise from
the power lines (generally,
display values will be
unstable).
Wire the lead wires and power lines in separate conduits, or
wire them using a more direct path.
Connection between the
Digital Controller and
thermocouple is using copper
wires.
Connect the thermocouple's lead wires directly, or connect a
compensating conductor suitable for the thermocouple.
Installation location of
thermometer is unsuitable.
Make sure that the location that is being measured with the
temperature sensor is suitable.
Input shift is not set correctly
(default: 0°C)
Set a suitable input shift. If input shift is not required, set the
input shift value to 0.0.
Keys will not operate Setting change protect is ON. Turn OFF setting change protect.
Cannot shift levels Operations limited due to
protection.
Set the operation/adjustment protect, initial
setting/communications protect, and setting change protect
values as required.
After long
service life
Control is unstable Terminal screws may be
loose.
Retighten terminal screws to a torque of 0.43 to 0.58 N·m.
The internal components have
reached the end of their
service life.
The Digital Controller's internal electrolytic capacitor depends
on the ambient temperature, and load rate. The 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.
To Next Page
Loading...
Need help?
General
