Using Heater Burnout (Hb) And Heater Short (Hs) Alarms (Not Supported For Position-Proportional Models.); Hb Alarm - Omron E5*C Series User Manual

4 Basic Operation
4-12 Using Heater Burnout (HB) and
Heater Short (HS) Alarms (Not
Supported for Position-proportional
Models.)
These functions are supported for models that detect heater burnout (HB) and heater short (HS)
alarms.

4-12-1 HB Alarm

 What Is an HB Alarm?
An HB alarm is detected by measuring the heater current with a current transformer (CT) when the
control output is ON. If the measured heater current is lower than the setting of the Heater Burnout
Detection parameter, an alarm is output.
Temperature sensor
Current value
This alarm cannot be used for the cooling control output. The default setting for the Auxiliary Output
1 Assignment is for heater alarms. Therefore, the alarm 1 function is disabled and the Alarm 1 Type
is not displayed. You can use the output assignment parameters to change the alarm output
location. For details, refer to 4-6-3 Assigned Output Functions (Assigning Control Outputs Is Not
Supported for Position-proportional Models.) on page 4-16. You can use an integrated alarm to
output an OR of alarms 1 to 4 and the other alarms. For details on the integrated alarm, refer to 5-9
OR Output of Alarms.
 Parameters
Parameter
HB ON/OFF
Heater Burnout
Latch
Heater Burnout
Hysteresis
Heater Burnout
Detection 1 or 2
(alarm current)
Heater Current 1 or
2 Value Monitor
Auxiliary Output 1
to 4 Assignment
4 - 40
Temperature Input
E5@C
Auxiliary output
(assigned to an HB alarm)
Voltage output (for driving SSR)
SSR
CT
×
Heater burnout
No. 1 display
OFF or ON (default: ON)
hbu
OFF or ON (default: OFF)
hbl
0.1 to 50.0 A (default: 0.1 A) 0.1 to 50.0
hbh
0.0 to 50.0 A (default: 0.0 A) 0.0 to 50.0
hb1
hb2
0.0 to 55.0 A
ct1
ct2
sub1 to sub4 HB: HB alarm or HA: Heater
alarm
Value No. 2 display
off, on
off, on
0.0 to 55.0
hb or ha
E5@C Digital Temperature Controllers User's Manual (H174)
Level
Advanced Function
Setting Level
Adjustment Level
Advanced Function
Setting Level