Weidmuller PTX800D User Manual
de
Bedienungsanleitung
Zähler und Totaliser mit Zusatzfunktionen und Grenzwertüberwachung 3
en
Operating instructions
Counter and totaliser with auxiliary
functions and threshold monitoring 24
PTX800D 61001050/00/01.08
en
PTX800D
Contents
Operation 25
Setup options 27
Setup Sequence 31
Installation 34
Modifications
Output calibration 40
39
24
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PTX800D
Analogue output
(gives rate or total)
Pulse Output
Pulse Input
Total or
Rate Display
Power for Input device
Reset Pulse Input
Alarm 2
Power
Supply
Alarm 1
PTX800D
• Operation
General
The PTX800D is a scalable pulse counter/rate indicator for digital pulse
signals. It will display either the rate or total according to setup. The
other value is displayed when you hold down the TOTAL/RATE key.
For more complex applications, the PTX800D can be supplied with
two alarm channels and/or an analogue retransmit output.
Alarm conditions are indicated by the LEDs above buttons marked AL1
(for alarm channel one) and AL2 (for alarm channel two).
Manually clearing tripped alarms
The alarm channels can be set for automatic or manual reset. For
manual reset, the LED will flash when an alarm trips. These alarms will
only clear if you have acknowledged the alarm and the trip condition
has cleared. Press AL1 or AL2 to acknowledge the alarm.
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Viewing the alarm setpoints
Press the AL1 or AL2 at any time to display the setpoint for that
channel. The value will be shown for 5 s. If the alarms are disabled,
pressing the key will have no effect.
Changing the alarm setpoints
Press PGM while the setpoint is on display (see above), you will be able
to change the value using the ì and Å keys. To save the changes,
press PGM. Note: you can disable this feature during setup for greater
security.
Checking the Rate/Total
You can set up the PTX800D to show either total or rate. If the total
is normally on display, you can check the rate by holding down the
TOTAL/RATE key.
Reseting the total
If you press the RESET key, the PTX800D will set the total to zero and
clear any total alarms (you can disable this feature during setup for
greater security). There is also an external reset input that you can use
to clear the total remotely.
Reviewing the setup options
To review the setup (in read only mode) press the PGM key. The
PTX800D will show the software version number. Press the Å key to
see the next setting. The information in review mode is shown in the
same order as setup mode (some irrelevant items will be skipped).
There is a 10 s timeout during review mode or you can press PGM
again to return the display to normal operation.
You can review the setup while the instrument is in service - the unit
will continue to operate normally. Setup mode
26
Changing the setup options
You should only use setup mode if you have to change a setting or
calibrate the outputs. The setup mode stops all operation. As soon as
you have setup the last parameter, the unit behaves as if it has been
switched on with the new settings. This does not mean that the total is
reset - you must do this yourself if necessary.
If you want to abandon all the changes you have made, simply remove
the security link (or remove the power) before the save message is
shown.
To change the instrument setup:
. Con
nect the security link (short pins 8 & 12).
1
2. Press the
The setup sequence is shown in the table on page two.
PGM key.
• Setup options
General
There are four basic areas of the instrument operation that must be
setup on a fully configured PTX800D. They are:
e/frequency inputs;
• Puls
• Display and keypad operation;
• Alarms one and two (optional); and
• Analogue outputs (optional).
You can disable the alarms and/or analogue outputs if you do not need
them (so that their settings are skipped).
Software version
The information in this guide refers to versions 1.00 to 1.09.
Model
PTX series instruments all look identical from the front so this identifies
the intrument type.
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Input signal type
Sets the input trigger and reset levels to suit the pulse source. The
table below gives the threshold values.
For contact closure inputs, the software incorporates debouncing
min
imum pulse width 20 mS / maximum frequency 10 Hz).
(
Input type
LOAC
HIAC
LOdC
HIdC
CoN
Low volta ge inputs High vo ltage inputs
Trigger Rese t Trigger Rese t
50 mV -50 mV 200 mV -40 0 mV Low level AC sign als
2.5 V -2.5 V 14 V -10 V High level A C signals
3.5 V 0.5 V 20 V -2 V Low level DC signals
6 V 3 V 35 V 10 V High l evel DC signals
6 V 3 V 35 V 10 V Contact clos ure
Desc ription
Pulse rate
Set the pulse rate to low if the maximum input frequency is below
z. Otherwise it should be set to high.
1 kH
Pulse scaling factor
Sets the number of pulses received for a unit change in the total. So, if
you have a flowmeter that gives four pulses per litre, you can show the
total in litres by setting the pulse scaling factor to four, or in kilolitres by
setting the pulse scaling factor to four thousand. You can not set it to
more than 10 000 display digits (i.e., ignoring the decimal point).
Total decimal point
The total decimal point position sets the number of decimal places for
the total display. Totals are displayed using the full eight digits.
Rate decimal point
Sets the number of decimal places for the rate display. Rates are
displayed as five digit numbers.
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Rate scaling factor
The rate scaling factor sets the ratio between the total display and the
rate display. It must be a power of ten (i.e., 1000, 100, ..., 0.01, or 0.001).
Number of samples
X800D calculates the rate every 260 mS. The analogue output
The PT
and display are then updated from the average over the programmed
number of samples. For example, if you set the number of samples to
e analogue output and rate display will be updated every 2.6 s.
10, th
Rate timebase
The rate timebase setting sets the timebase for the rate display. It can
be set to hours, minutes or seconds.
Show rate or total
Use the display rate/total setting to choose the measurement that will
normally be on display.
Enable Reset key
The front panel reset key can be used to reset the total. You can
disable this feature (for added security) using this setting.
Alarms disable/enable
If you do not need alarms, you can disable them. This simplifies the
setup process, as all of the parameters related to the alarm operation
are skipped.
Alarm type
Each alarm channel can monitor the total or the rate. Total alarms
operate when the setpoint is exceeded. A ‘total’ alarm trip condition
clears when the total is reset.
Setpoint
The setpoint is the display value at which an alarm activates. It can be
changed during normal operation if the setpoint security option is off.
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