Hs Alarm - Omron E5AC-T User Manual

4 Basic Operation
• Checking the Heater Current
1
Press the M Key several times in the Adjustment Level to
display ct1 (Heater Current 1 Value Monitor).
2
Check the heater current from the CT input that is used to
detect heater burnout.
The monitoring range is 0.0 to 55.0 A.
• Setting Heater Burnout Detection
1
Press the M Key several times in the Adjustment Level to
display hb1 (Heater Burnout Detection 1).
2
Press the U or D Key to set the set value to 2.5
Refer to 4-12-4 Calculating Detection Current Values when you set
the value.

4-12-2 HS Alarm

What Is an HS Alarm?
An HS alarm is detected by measuring the heater current with a current transformer (CT) when the
control output is OFF. If the measured heater current is higher than the setting of the HS Alarm
parameter, an alarm is output.
Temperature sensor
Current value
Control output
(heating)
OFF
This alarm cannot be used for the cooling control output. With the default settings, the HS 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 5-8 OR Output of Alarms.
4 - 66
E5@C-T
Auxiliary output
(assigned to an HS alarm)
Voltage output (for driving SSR)
SSR
×
CT

HS alarm

Power to heater
Yes (HS alarm)
No (normal)
HS alarm output
ON
OFF
E5@C-T Digital Temperature Controllers User's Manual (H185)
Adjustment Level
ct1
Heater Current 1
Value Monitor
0.0
ct1
0.0
Adjustment Level
hb1
Heater Burnout
Detection 1
0.0
hb1
2.5