Endress+Hauser Proline Prowirl 73 - Page 128

Description of device functions Proline Prowirl 73
128 Endress+Hauser
PULSE VALUE Prerequisite
The function is only available if PULSE was selected in the OPERATION MODE function
(ä 122).
Description
Use this function to define the flow at which a pulse should be output. These pulses can
be totaled by an external totalizer and the total flow since measuring started can be
recorded in this way.
Select the pulse value in such a way that the pulse frequency does not exceed a value of
100 Hz with maximum flow.
The appropriate unit is taken from the SYSTEM UNITS group (ä 102).
User input
5-digit floating-point number
Factory setting
See the parameter printout provided. The parameter printout is an integral part of these
Operating Instructions.
PULSE WIDTH Prerequisite
The function is only available if PULSE was selected in the OPERATION MODE function
(ä 122).
Description
Use this function to enter the pulse width of the output pulses.
When entering the pulse width, select a value that can still be processed by an external
totalizer (e.g. mechanical totalizer, PLC, etc.).
If the selected pulse width cannot be maintained (interval P < pulse width B entered),
a system error message is generated after approx. 5 seconds buffer time/idling time:
"#359 RANGE PULSE" (ä 65). The reason for not being able to maintain the pulse
width could be that the pulse number or frequency, which result from the pulse value
entered (ä 128, PULSE VALUE function) and the current flow, are too big.
Pulses are always generated with the pulse width (B) entered in this function. The
intervals (P) between the individual pulses are automatically configured. However, they
must at least correspond to the pulse width (B = P).
A0001233-en
B = Pulse width entered (the illustration applies to positive pulses)
P = Intervals between the individual pulses
User input
5 to 2000 ms
Factory setting
20 ms
Function description, PULSE, FREQUENCY, STATUS group
B
=
P
B
P
P
B
B
<
P
tt
transistor transistor
conducting
nonconducting
conducting
nonconducting