Endress+Hauser Proline Promag 300, Описание параметров устройства

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Proline Promag 300 Modbus RS485 Description of device parameters
Hauser 125
Additional information Description
The dictates of safety render it advisable to ensure that the pulse output shows a
predefined behavior in the event of a device alarm.
Selection
• Actual value
In the event of a device alarm, the pulse output continues on the basis of the current
flow measurement. The fault is ignored.
• No pulses
In the event of a device alarm, the pulse output is "switched off".
NOTICE! A device alarm is a measuring device error that must be taken seriously. It can
affect the measurement quality such that the quality can no longer be guaranteed. The
Actual value option is only recommended if it can be guaranteed that all possible alarm
conditions will not affect the measurement quality.
Pulse output 1 to n
Navigation  Expert → Output → PFS output 1 to n → Pulse output 1 to n (0456–1 to n)
Prerequisite In the Operating mode parameter (→  120), the Pulse option is selected.
Description Displays the pulse frequency currently output.
User interface Positive floating-point number
Additional information Description
• The pulse output is an open collector output.
• This is configured at the factory in such a way that the transistor is conductive for the
duration of the pulse (NO contact) and is safety-oriented.
NC NO
t t
0
1
0
1
A0028726
0 Non-conductive
1 Conductive
NC NC contact (normally closed)
NO NO contact (normally open)
The output behavior can be reversed via the Invert outp.sig. parameter (→  138) i.e.
the transistor does not conduct for the duration of the pulse.
In addition, the behavior of the output in the event of a device alarm (
Failure mode
parameter (→  124)) can be configured.