Pepperl+Fuchs 1/209 Handbuch Seite 77

Trip Amplifier 1/209
Software Description
Trip points are in engineering units as determined by the beginning and end of range (full
scale) values. This relieves the user from tedious conversion tasks. This command sets
the trip point in the centre of the deadband (hysteresis op3 as with conventional trip
amplifiers).
Example
• high contact = 60 %
• hysteresis = 6 %
• alarm > 63 %
• no alarm < 57 %
The hysteresis is also set in engineering units (0.1 % to 100 %).
4.4.1.10 Trip Low on Midhysteresis
This command is used to monitor a low alarm. You can monitor inputs or computed
values.
Call
Formula
Example
• high contact = 60 %
• hysteresis = 6 %
• alarm < 57 %
• no alarm > 63 %
4.4.1.11 Trip High on Setpoint
This command is used to monitor a low alarm. You can monitor inputs or computed
values. In contrast to previous alarms this one triggers exactly on the preset trip point. The
hysteresis or deadband will then be to one side of the setpoint.
Call
Formula
Example
• high contact = 60 %
• hysteresis = 3 %
• alarm > 60 %
• no alarm < 57 %
The hysteresis is also set in engineering units (0.1 % to 100 %).
ALM,op1,op2, op3, op4 (Alarm Low Midhysteresis)
ALM = alarm low contact on centre hysteresis
op1 = value to be monitored (e.g. AE1 ... AE4)
op2 = trip point
op3 = hysteresis
op4 = result
op4 = 1 for alarms or if op4 was 1 before
op4 = 0 while inside deadband or if op4 was 0 before
op4 = -1 when there is no alarm
AHS,op1,op2,op3,op4 (Alarm High on Setpoint)
AHS = alarm high contact exactly on setpoint
op1 = value to be monitored (e.g. AE1 ... AE4)
op2 = trip point
op3 = hysteresis
op4 = result
op4 = 1 for alarms or if op4 was 1 before
op4 = 0 while inside deadband or if op4 was 0 before
op4 = -1 when there is no alarm
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