Proline Promag 300 Modbus RS485 Description of device parameters
Endress+Hauser 109
The operational range of the measuring device is defined by the values entered for the 0/4
mA value parameter (→ 108) and 20 mA value parameter (→ 109). If the
effective flow exceeds or falls below this operational range, the diagnostic message
S441 Curr.output 1 to n is displayed.
Configuration example B
Measuring mode with Forward/Reverse option
A0013758
I Current
Q Flow
1 Value assigned to the 0/4 mA current
2 Forward flow
3 Reverse flow
The current output signal is independent of the direction of flow (absolute amount of the
measured variable). The values for the 0/4 mA value parameter (→ 108) and 20 mA
value parameter (→ 109) must have the same sign. The value for the 20 mA value
parameter (→ 109) (e.g. reverse flow) corresponds to the mirrored value for the 20
mA value parameter (→ 109) (e.g. forward flow).
Configuration example C
Measuring mode with Rev. flow comp. option
If flow is characterized by severe fluctuations (e.g. when using reciprocating pumps), flow
components outside the measuring range are buffered, balanced and output after a
maximum delay of 60 s → 110.
20 mA value
Navigation Expert → Output → Curr.output 1 to n → 20 mA value (0372–1 to n)
Prerequisite One of the following options is selected in the Current span parameter (→ 106):
• 4...20 mA NAMUR
• 4...20 mA US
• 4...20 mA
• 0...20 mA
Description Use this function to enter a value for the 20 mA current.
User entry Signed floating-point number
Factory setting Depends on country and nominal diameter→ 212
Additional information Description
Positive and negative values are permitted depending on the process variable assigned in
the Assign curr. parameter (→ 106). In addition, the value can be greater than or
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