Using Heater Burnout (Hb) And Heater Short (Hs) Alarms (Not Supported For Position-Proportional Models.); Hb Alarm - Omron E5C User Manual

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. With the default settings, the HB alarm is
output on auxiliary output 1. You can use the output assignment parameters to change the output.
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
E5@C Digital Temperature Controllers User's Manual (H174)
Temperature Input
E5@C
Auxiliary output
(assigned to an HB alarm)
Voltage output (for driving SSR)
SSR
CT
×
Heater burnout
No. 1 display
hbu
OFF or ON (default: ON)
hbl
OFF or ON (default: OFF)
hbh
0.1 to 50.0 A (default: 0.1 A) 0.1 to 50.0
hb1
0.0 to 50.0 A (default: 0.0 A) 0.0 to 50.0
hb2
ct1
0.0 to 55.0 A
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
4 Basic Operation
Level
Advanced Function
Setting Level
Adjustment Level
Advanced Function
Setting Level
4 - 39
4