Omron EJ1 User Manual

86
Detecting Current Errors Section 4-5
4-5 Detecting Current Errors
4-5-1 CT Assignment (TC2)
This parameter specifies which output's current is being measured.
Three-phase heater burnout detection can also be performed by assigning
two CTs to one output.
Note This parameter can be set only when operation is stopped.
■ Examples:
Example 1 Heater burnout detection is performed on each channel's control
output (heating).
Example 2 Three-phase heater burnout detection is performed on channel
1's control output (heating).
4-5-2 Heater Burnout Alarm (HB Alarm)
A heater burnout is detected by measuring the heater current while the control
output (heating) is ON. For details, refer to the following table. (Heater burnout
detection cannot be used with the control output for cooling.)
Variable type Parameter name Setting range Default
E4/A4 CT1 Assignment (I/O) 0: Disabled
1: Control output 1
2: Control output 2
3: Control output 3
4: Control output 4
1
CT2 Assignment (I/O) 2
Conditions for use There must be a CT input.
OUT1
Channel 1 Control
Output (Heating)
CT1 CT1 Assignment = 1 (OUT1)
OUT2
Channel 2 Control
Output (Heating)
CT2 CT2 Assignment = 2 (OUT2)
Associated by the
CT1 Assignment.
Associated by the Control
Output 2 Assignment.
Associated by the
CT2 Assignment.
Associated by the Control
Output 1 Assignment.
OUT1
Channel 1 Control
Output (Heating)
CT1 CT1 Assignment = 1 (OUT1)
CT2 CT2 Assignment = 2 (OUT2)
Control output (heating) Power to heater HB Alarm output
ON Yes (Normal) (See note 1.) OFF
No (Heater burnout) ON
Control output (heating)
ON
OFF
ON time
(See note 2.)
OFF time

Omron EJ1 Specifications

General

Brand	Omron
Model	EJ1
Category	Temperature Controller
Language	English