Detecting Current Errors; Ct Assignment (Tc2); Heater Burnout Alarm (Hb Alarm) - Omron EJ1 User Manual

Detecting Current Errors

4-5

Detecting Current Errors

4-5-1

CT Assignment (TC2)

Note
4-5-2

Heater Burnout Alarm (HB Alarm)

86
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.
Variable type
E4/A4 CT1 Assignment
CT2 Assignment
Conditions for use There must be a CT input.
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).
Associated by the Control
Output 1 Assignment.
Channel 1 Control
Output (Heating)
Channel 2 Control
Output (Heating)
Associated by the Control
Output 2 Assignment.
Example 2 Three-phase heater burnout detection is performed on channel
1's control output (heating).
Channel 1 Control
Output (Heating)
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.)
Control output (heating)
ON
ON time
(See note 2.)
ON
Control output (heating)
OFF
Parameter name
(I/O) 0: Disabled
(I/O)
Associated by the
CT1 Assignment.
OUT1 CT1 CT1 Assignment = 1 (OUT1)
OUT2 CT2 CT2 Assignment = 2 (OUT2)
Associated by the
CT2 Assignment.
OUT1 CT1 CT1 Assignment = 1 (OUT1)
CT2 CT2 Assignment = 2 (OUT2)
Power to heater
Yes (Normal) (See note 1.)
No (Heater burnout)
OFF time
Section 4-5
Setting range Default
1
1: Control output 1
2: Control output 2
2
3: Control output 3
4: Control output 4
HB Alarm output
OFF
ON