Settings
MIQ/CR3; DIQ/CR3
4 - 8
ba64107e08
05/2006
Frequency output
Switching frequency output is used, e.g. for controlling dosing pumps.
In contrast to the pulse-width output, not the pulse width is modulated
with frequency output but the switching frequency of the output signal.
Depending on the position of the measured value in the proportional
range, the relay is switched more often or less often.
Fig. 4-5
Relay output of frequency output
While the selected switching duration (t
on
= 0.3 s) always remains
constant, the switching frequency at which the relay switches changes
depending on the measured value.
!
If the measured value is at the end of the proportional range (
End
value
), the switching frequency is higher.
!
If the measured value is at the beginning of the proportional range
(
Start value
), the switching frequency is low.
Time [s]
t = 0.3 s
On
Relay
Off
On
T
Oxley Creek WWTP Water Reclamation (WTW - ba64107e08_xIQ_CR3) Vendor Manual
Doc Id: VM20
Owner: Howard Witten
Active Date: 15/12/2006
