Pepperl+Fuchs 1/209 Handbuch Seite 76

Trip Amplifier 1/209
Software Description
4.4.1.7 Live Zero Conversion
Call
Formula
This command serves to convert live zero input signals into engineering units. That way
measured values and trip points can be displayed as °C, m
units. The user does not have to establish conversion formula for himself.
Example
• Begin = 180 at 4 mA
• Full scale = 380 at 20 mA
• Display = 280 at 12 mA
The device front offers space for entering TAG numbers and engineering units. Enter
• 0 = beginning
• 100 = full scale
in order to display percentage values.
Live zero signals: 4 mA ... 20 mA, 1 V ... 5 V, 2 V ... 10 V
4.4.1.8 Dead Zero Conversion
Convert dead zero input signals into engineering units.
Call
Formula
The function is equivalent to the live zero conversion.
Dead zero signals: 0 mA ... 20 mA, 0 V ... 5V, 0 V ... 10 V
4.4.1.9 Trip High on Midhysteresis
This command is used to monitor a high alarm. You can monitor inputs or computed
values such as ADD, AE1, AE2, OP1
Call
Formula
Monitors the average of input 1 and input 2 etc.
Use Operand op4 to energize or deenergize
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CLI, op1, op2, op3, op4 (Convert Live Input)
CLI = live zero - measuring range
op1 = input (AE1 ... AE4)
op2 = beginning of range
op3 = full scale
op4 = result
op4 = (op1-0.2) / 0.8 x (op3-op2) + op2
CDI, op1, op2, op3, op4 (Convert Dead Input)
CDI = dead zero - measuring range
op1 = input (AE1 ... AE4)
op2 = beginning of range
op3 = full scale
op4 = result
op4 = op1 x (op3-op2) + op2
AHM,op1,op2, op3, op4 (Alarm High Midhysteresis)
AHM = alarm high 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
relays.
3
/h, % or other engineering