![background image](http://html.mh-extra.com/html/omron/e5c-series/e5c-series_user-manual_742592341.webp)
A - 15
A Appendices
E5@C Digital Temperature Controllers User’s Manual (H174)
A-5 T
rou
b
lesho
o
ting
A
A-5
Troubleshooting
Checking Problems
If the Digital Controller is not operating normally, check the following points before requesting repairs. If
the problem persists, contact your OMRON representative for details on returning the product.
*
Also refer to the E5
@
C Digital Controllers Communications Manual (Cat. No. H175) for details.
Timing
Status
Meaning
Countermeasures
Page
Turning
ON the
power for
the first
time
The TUNE indicator will
flash.
ST (self-tuning) is in
progress (default setting:
ON).
This is not a product fault.
The TUNE indicator flashes during self-tuning.
4-26
Temperature error is
large.
Input error (S.Err display)
Input type mismatch
Check the sensor type and reset the input type correctly.
4-12
Thermometer is not
installed properly.
Check the thermometer installation location and polarity
and install correctly.
2-13,
2-21,
2-26
Communications are not
possible.
Non-recommended
adapter is being used.
Make sure that the connected device is not faulty.
*
During
operation
Overshooting
Undershooting
Hunting
ON/OFF control is
enabled (default: ON/OFF
control selected).
Select PID control and execute either ST (self-tuning) or
AT (auto-tuning).
When using self-tuning, turn ON the power supply to the
Digital Controller and load (heater, etc.) at the same time,
or turn ON the load power supply first. Accurate
self-tuning and optimum control will not be possible if the
power supply to the load is turned ON after turning ON the
power supply to the Digital Controller.
4-24
Control period is longer
compared with the speed
of rise and fall in
temperature.
Shorten the control period. A shorter control period
improves control performance, but a cycle of 20 ms
minimum is recommended in consideration of the service
life of the relays.
4-15
Unsuitable PID constant
Set appropriate PID constants using either of the following
methods.
• Execute AT (autotuning).
• Set PID constants individually using manual settings.
4-24
HS alarm operation fault
Use breeder resistance if the problem is due to leakage
current. Also investigate the errors detected by the HS
alarm function.
4-41
Temperature is not rising
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.
4-15
Heater is burnt out or
deteriorated.
Check whether heater burnout or deterioration have
occurred. Also investigate the errors detected by the
heater burnout alarm.
4-39
Insufficient heater
capacity
Check whether the heater's heating capacity is sufficient.
---
Cooling system in
operation.
Check whether a cooling system is operating.
---
Peripheral devices have
heat prevention device
operating.
Set the heating prevention temperature setting to a value
higher than the set temperature of the Digital Controller.
---
Содержание E5C series
Страница 2: ......
Страница 18: ...Conventions Used in This Manual 16 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 34: ...1 Introduction 1 10 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 98: ...3 Part Names and Basic Procedures 3 20 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 310: ...6 Parameters 6 94 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 326: ...7 User Calibration 7 16 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 364: ...A Appendices A 38 E5 C Digital Temperature Controllers User s Manual H174 ...
Страница 365: ...Index 1 E5 C Digital Temperature Controllers User s Manual H174 I Index ...
Страница 370: ...Index 6 E5 C Digital Temperature Controllers User s Manual H174 ...