User Manual

i
This parameter can be used to inhibit (suppress) the Alarm activation upon power-up
conditions by setting the parameter value to ‘YES”. From Power-up, the Alarm system
remains disabled until PV is found with in the limits.
If Alarm activation is desired even under Power-up condition, Set this parameter value to
‘NO’.
No
Alarm
Inhibit
If this parameter is set as ‘Direct’, Relay/SSR energizes under Alarm condition & remains De-
energized otherwise. ‘Direct’ setting is generally used for Audio/Visual Alarm Output.
If this parameter is set as ‘Reverse’, Relay/SSR De-energizes under Alarm condition &
remains energized otherwise. ‘Reverse’ setting is generally used for tripping the process
under Alarm condition.
Direct
Alarm
Logic
Once Alarm is activated, it can be de-activated either by pressing UP key or when PV falls
within the alarm limits.
Once Alarm is activated, it remains activated until manually acknowledged by UP key.
Once Alarm is activated, user has following three options to de-activate it.
When PV falls within the programmed limits, Alarm will be de-activated automatically.
Auto
Alarm
Ack.
Alarm
Hysterisis
This parameter will be prompted only if selected control action is ON-OFF. It sets the dead
band between ON & OFF switching of the Output. Larger value of hysterisis minimize the
number of ON-OFF operation of load.This increases life of actuators like contactors but also
produces large errors (between PV & SV).
2°C
Description
Parameter
Default
Lower
Display
Upper
Display
Low Alarm : OP2 activates when PV<SP2.
High Alarm : OP2 activates when PV>SP2.
OUTPUT-2 ON
OUTPUT-2 OFF
SP2
PV
(Direct acting)
SP2
OUTPUT-2 OFF
OUTPUT-2 ON
PV
(Reverse acting)
OUTPUT-2 OFF
OUTPUT-2 ON
SP2
PV
(Direct acting)
SP2
OUTPUT-2 ON
OUTPUT-2 OFF
PV
(Reverse acting)
Band Alarm : OP2 activates when PV falls outside the band w.r.t. SP1 in either
direction.
(Direct acting) (Reverse acting)
OUTPUT ONOUTPUT ON
PV
SP1
SP2SP2
OUTPUT OFF
OUTPUT OFF OUTPUT OFF
PV
SP1
SP2SP2
OUTPUT ON
Alarm
Type
Deviation
OUTPUT ON
PV
SP1
OUTPUT OFF
OUTPUT OFF
+Ve
dev
PV
Sp1
OUTPUT ON
Low Deviation Alarm : OP2 activates when PV is less than SP1 ± set deviation value
OUTPUT OFF
PV
OUTPUT ON
OUTPUT ON
PV
OUTPUT OFF
SP2 SP2
SP2
SP2
-Ve
dev
+Ve
dev
-Ve
dev
High Deviation Alarm : OP2 activates when PV is greater than SP1 ± set
deviation value
OUTPUT ON
PV
SP1
OUTPUT OFF
OUTPUT ON
PV
OUTPUT OFF
SP2
SP2
OUTPUT OFF
PV
SP1
OUTPUT ON
OUTPUT OFF
PV
OUTPUT ON
SP2
SP2
+Ve
dev
+Ve
dev
-Ve
dev
-Ve
dev
OIM - Humi-Temp V2 Page 11 of 16