Omron E5AR - MANUAL 2 User Manual

Section 10 Troubleshooting
10-6
Troubleshooting
● Overshoot or undershoot occurs
● Hunting occurs
Check connections and settings as explained above in "Overshoot or undershoot occurs".
Possible cause Solution
Connections
Abnormal measured value. See section 10.3.
A regular slow thermal response temperature
sensor is connected to a fast thermal response
control system.
Change to a sheath-type temperature sensor.
Settings
The proportional band is too narrow; the P value is
too small.
• Increase the P value within the limit that the
response speed does not become too slow.
•Run AT.
The integral time is too short; the I value is too
small.
• Increase the I value within the limit that the
response speed does not become too slow.
•Run AT.
The derivative time is too short; the D value is too
small.
• Increase the D value within the limit that stability
during rectification does not deteriorate.
•Run AT.
ON/OFF control is being performed. Use P control or PID control.
The control period is too long in a fast thermal
response control system.
Shorten the control period.
Overlap band is mistakenly set as a dead band in
heating/cooling control.
Set to overlap band.
Possible cause Solution
Method of use
The heat capacity of the heater is too large for the
heat capacity of the object of control.
Use a heater with a heat capacity suitable for the
object of control.
Periodic disturbances occur that cause the heat
capacity of the object of control to change.
Establish an environment will minimal
disturbances.
AT is running. Hunting will stop when AT ends.

Omron E5AR - MANUAL 2 Specifications

General

Brand	Omron
Model	E5AR - MANUAL 2
Category	Controller
Language	English