Omron E5CZ User Manual

159
Appendix A
During opera-
tion
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 Temperature 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 sup-
ply to the Temperature Controller.
43
Control cycle is
lon
ger compared
with the speed of rise
and fall in tempera-
ture
Shorten the control cycle. A shorter control
cycle improves control performance, but a
cycle of 20 ms minimum is recommended in
consideration of the service life of the
relays.
36
Unsuitable PID con-
stant
Set appropriate PID constants using either
of the following methods.
• Execute AT (autotuning).
• Set PID constants individually using man-
ual settings.
43
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.
50
Temperature is not
rising
Speci
fied operation
is unsuitable for
required control
(default: Reverse
operation)
Select either direct or reverse operation
depending on the required control. Reverse
operation is used for heating operations.
36
Heater is burnt out or
deteriorated.
Check whether heater burnout or deteriora-
tion have occurred. Also investigate the
errors detected by the heater burnout
alarm.
50
Insufficient heater
capa
city
Check whether the heater’s heating capac-
ity is sufficient.
---
Cooling system in
operation.
Check whether a cooling system is operat-
ing.
---
Peripheral devices
have heat prevention
device operating.
Set the heating prevention temperature set-
ting to a value higher than the set tempera-
ture of the Temperature Controller.
---
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.
101
Specified operation
is unsui
table for
required control
(default: Reverse
operation)
Select either direct or reverse operation
depending on the required control. Reverse
operation is used for heating operations.
37
A high hysteresis is
set for
ON/OFF
operation (default:
1.0°C)
Set a suitable value for the hysteresis. 41
Temperature Con-
tro
ller will not oper-
ate
Set to STOP
(default: RUN)
Set the RUN/STOP mode to RUN. If STOP
is lit on the display, control is stopped.
101
Timing Status Meaning Countermeasures Page

Omron E5CZ Specifications

General

Brand	Omron
Model	E5CZ
Category	Temperature Controller
Language	English