FMS EMGZ622A, Operating Manual

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Operating Manual EMGZ622A/642A
18
8.6 Additional Settings
Setting the low-pass filters
The measuring amplifier provides 1 low-pass filter for the display and 1 low-pass filter for the
output signal of each channel. They are used to prevent noise which is added to the signals.
The low-pass filters are configured by setting its cut off frequency to an appropriate value.
The cut off frequency is set in the parameter
Lowpass display resp. Lowpass output (ref. to „9.
Parametrization“). Signal variations which are faster than the cut off frequency are then
suppressed. The lower the cut off frequency, the more sluggish the display value resp. the
output signal will be.
Note
If the cut off frequency is set to a value too low, the output signal will become sluggish. It may
be that the feedback value is no longer suitable for control loop applications. You have to pay
attention that the cut off frequency is set to a suitable value.
Setting the limit switches
The measuring amplifier provides a min and a max limit switch per channel. The threshold
values may be set freely using the channel parameters
Min. limit / Max. limit (ref. to „9.5
Description of the parameters: EMGZ622A/642A“). If the electronic unit detects exceeding of
the values set, it can switch on an LED and / or a dig. output.
Tapping of the limit switches is done according to the wiring diagram (fig. 6).
Gain switching
If a measuring point is operated with varying measuring conditions (i.e. different material
paths), the gain value of each channel may be switched between two values depending on the
material path. The additional gain values must be calibrated also during setup (ref. to „9.5
Description of the parameters: EMGZ622A/642A“, parameter function
Calib. gain 1 ).
Switching is done using a digital input.
Wiring of the dig. inputs is done according to the wiring diagram (fig. 6).
Digital inputs
The digital inputs may be used for various purposes. Wiring is done according to the wiring
diagram (fig. 6).
Digital outputs
The digital outputs may be used for various purposes. Configuration is done by setting the
channel parameters
dig. output 1&2for each channel to an appropriate value (ref. to „9.5
Description of the parameters: EMGZ622A/642A“).
The dig. outputs are operated as „open collector“ outputs. Wiring is done according to the
wiring diagram (fig. 6).
LED on the operating panel
The LED on the operating panel may be used for various purposes. Configuration is done by
setting the channel parameters
Config. of LED to an appropriate value (ref. to „9.5 Description
of the parameters: EMGZ622A/642A“).