Omron E5GC User Manual page 168

4 Basic Operation
Parameters
Parameter
HS Alarm Use
HS Alarm Latch
HS Alarm Hysteresis
HS Alarm 1 or 2 (alarm
current)
Leakage Current 1 or
2 Monitor
Auxiliary Output 1 to 4
Assignment
ON
Control output (heating)
OFF
In the above diagram, power is considered to be OFF (normal) if the leakage current is less than
hs1 or hs2 (heater short detection current) during the Toff interval. The HS alarm will be OFF in this
case. If the leakage current is greater than hs1 or hs2 (heater short detection current) during the
Toff interval, the HS alarm will turn ON. Heater short are not detected if the OFF time (Toff) for the
control output for heating is 100 ms or less (35 ms or less if the control period is 0.1 or 0.2 s). Heater
shorts are not detected in the following cases.
• Control will be continued even when there is an HS alarm.
• The rated current may sometimes differ slightly from the actual current flowing to the heater. Use
the Leakage Current 1 Value Monitor and Leakage Current 2 Value Monitor parameters to check
the leakage current during actual operation
Set the HS Alarm Use parameter to ON in the Advanced Function Set-
ting Level and set the HS Alarm 1 parameter in the Adjustment Level.
This procedure sets the HS Alarm 1 parameter to 2.5.
Operating Procedure
• Setting the HS Alarm Use Parameter
1
Press the M Key several times in the Advanced Function Set-
ting Level to display hsu (HS Alarm Use).
2
Check to see if the set value is on (enabled, default).
4 - 42
No. 1 display Value
hsu
OFF or ON
(default: ON)
hsl
OFF or ON
(default: OFF)
hsh
0.1 to 50.0 A
(default: 0.1 A)
hs1
0.0 to 50.0 A
hs2
(default: 50.0 A)
lcr1
0.0 to 55.0 A
lcr2
sub1 to sub4
HS: HS alarm or
HA: Heater alarm
Ton
Toff
No. 2 display
off, on
Advanced Function
Setting Level
off, on
0.1 to 50.0
0.0 to 50.0 Adjustment Level
0.0 to 55.0
hs or ha
Advanced Function
Setting Level
Advanced Function Setting
Level
hsu
hsu
E5@C Digital Temperature Controllers User's Manual (H174)
Level
HS Alarm Use
on
on