Pepperl+Fuchs 2/209, Руководство пользователя

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23
DO
CT
-1946C
2018-
07
322
903
Trip Amplifier 2/209
Software description
EN
4.2.8 Live zero conversion
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
3
/h, % or other engineering
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
4.2.9 Dead zero conversion
Convert dead zero input signals into engineering units.
The function is equivalent to the live zero conversion.
Dead zero signals: 0 mA ... 20 mA, 0 V ... 5V, 0 V ... 10 V
Call 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
Formula op4 = (op1-0.2) / 0.8 x (op3-op2) + op2
Call 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
Formula op4 = op1 x (op3-op2) + op2