E44.X.01.6C-04
Mounting- and Operating Manual GIR 300
page 21 of 34
6.7 Up-/Downwards counter
The upwards counter starts counting from 0 according to its settings.
The downwards counter starts counting from the upper value that had been selected.
The current value of the counter can be reset anytime by connecting terminal 4 to GND (e.g. terminal 6)
The counter starts from its beginning as you disconnect the pin connection.
Feature:
The current counter value won‘t be lost if the voltage supply is disconnected.
After restarting the counter starts from this value.
This chapter describes how to configure the device as a counter.
This instruction demands that you selected “
Co.up
“ or “
Co.dn
“ as your desired input type like it is explained
in chapter 6.2
. The device has to display “
InP
“.
-
When pressing button 1 the display will show “
SEnS
“.
- Use button 2 or button 3 (middle or right button) to select the desired input signal.
Display
Input signal
Notes
ttL
TTL-signal
nPn
Switching contact, NPN
For direct connection of a passive switch-
ing contact (e.g. push button, relay) or
Transmitter with NPN output.
A pull-up-resistor is internally connected.
Hint: when using push-buttons or relays, they
must be bounce-free!
PnP
Switching contact, PNP
For direct connection of a transmitter with
PNP output.
A pull-down-resistor is internally con-
nected.
Hint:
For the connection of a frequency-transmitter, please follow the instructions given in chapter 5.3.6 and 5.3.7.
When connecting a switching-contact-transmitter with increased frequency range (= with external circuitry)
you have to select TTL as your desired input signal.
- Validate your selected input signal by pressing button
1. The display shows “
SEnS
“ again.
-
When pressing button 1 again, the device will be displaying “
EdGE
“ (signal edge).
- Use button 2 or button3 (middle or right button) to select the desired signal edge.
Display
Signal edge
Notes
PoS
positive
The counter is triggered on the positive
(rising) edge.
nEG
negative
The counter is triggered on the negative
(falling) edge.
- Press
button 1 to validate your selection, the display shows “
EdGE
“ again.
- When pressing button 1 again, the display
will show “
diu
“ (divisor = pre-scaling factor).
- Use button 2 and button 3 to select the desired pre-scaling factor
.
The incoming pulses will be divided with the selected pre-scaling factor, after that they will be
transmitted to the device for further processing
.
By this factor you can adapt the device to your transmitter or select a pre-scaling factor for
large values
.
Example 1: Your flow rate transmitter supplies 165 pulses per litre. When setting a pre-
scaling factor of 165 every 165th pulse (so 1 pulse per litre) will be used for fur-
ther processing.
Example 2: Your transmitter is supplying about 5 000 000 pulses during the measurement,
which exceeds the limit of the device.
But when setting a pre-scaling factor of 1000 only every 1000th pulse is used for
SENS
D,V
ED6E
