Omega | DPF20 Series | Owner Manual | Omega DPF20 Series Owner Manual

Omega DPF20 Series Owner Manual
TM
User’s Guide
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DPF20 Series
Panel Meter for
Frequency, Rate, Total
or Period Counter
6-Digit, 1⁄8 DIN Panel Mount
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reserves the right to alter specifications without notice.
2
WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship
for a period of 61 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1)
month grace period to the normal five (5) year product warranty to cover handling and shipping
time. This ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
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charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
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warranty, and
3. Repair instructions and/or specific problems
relative to the product.
FOR NON-WARRANTY REPAIRS, consult OMEGA
for current repair charges. Have the following
information available BEFORE contacting OMEGA:
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relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
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© Copyright 2018 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,
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3
DPF20 Frequency, rate, total or period counter
Instruction Manual
1. Panel meter DPF20
Counter, ratemeter and periodmeter, 96 x 48 mm (1/8 DIN)
Front protection IP65. Connections by plug-in screw terminals. For industrial applications.
• ‘Fast access’ menu to selected functions, accessible with key UP (5)
(see section 1.19.12)
• Function ‘On power up’ for system protection on first ‘cold’ start-up
or automatic reset (see section 1.19.15)
• Special ‘FAST’ mode for fast counting applications (see section 1.16)
• Special ‘SLOW’ mode for slow ratemeter applications (low frequency
applications) (see section 1.15)
• Direct configuration for most usual sensor, at the ‘SnSr / Auto’ menu
(see section 1.19.10)
• Function ‘Trigger Sense’ helps to detect the correct trigger level (see
section 1.13)
Multiple display filters, memory for maximum and minimum reading,
password protection, 5 brightness levels.
Panel meter 96 x 48 mm (1/8 DIN) and 6 digits with 14 mm digit height,
configurable with 5 impulse counter modes (see section 1.2), 2 ratemeter modes (see section 1.3) and a 1 periodmeter mode (see section
1.4).
Highly configurable, accepts all types of sensors (NPN, PNP, pushpull, Namur, inductive, pick-up, mechanical, TTL, CMOS, ...) including
quadrature signals (single and bidirectional encoder signals).
Reading from 999999 to -199999 with decimal point, scalable reading with configurable multiplier factor (1 to 999999) and configurable
divider factor (1 to 999999). Includes internal pull-up and pull-down
resistors, configurable trigger levels, detection by rising or falling edge,
excitation voltage configurable from 5 Vdc to 18 Vdc.
Options for output and control with 1, 2 and 3 relays, transistor outputs, SSR drive controls, isolated analog outputs, communications in
Modbus RTU, RS-485 ASCII and RS-232. Special options with 4 and 6
relay outputs.
Independent alarms configurable as maximum or minimum, with 1 or
2 setpoints per alarm, hysteresis, independent activation and deactivation delays and control for inverted relay.
Index
1. Panel meter DPF20 . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 How to order . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Impulse counter modes . . . . . . . . . . . . . . . . . . . 5
1.3 Ratemeter modes . . . . . . . . . . . . . . . . . . . . . . 5
1.4 Periodmeter mode . . . . . . . . . . . . . . . . . . . . . 5
1.5 Functions included . . . . . . . . . . . . . . . . . . . . . 5
1.6 Front view . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.7 Power connections . . . . . . . . . . . . . . . . . . . . . 6
1.8 Sensor configuration and connections . . . . . . . . . . . 6
1.9 Rear view . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.10 Signal connections . . . . . . . . . . . . . . . . . . . . . 6
1.11 Technical specifications . . . . . . . . . . . . . . . . . . 7
1.12 Mechanical dimensions (mm) (in) . . . . . . . . . . . . 7
1.13 Function ‘Trigger Sense’ . . . . . . . . . . . . . . . . . . 8
1.14 Function ‘cycle counter’ . . . . . . . . . . . . . . . . . . 8
1.15 ‘SLOW’ mode . . . . . . . . . . . . . . . . . . . . . . . . 8
1.16 ‘FAST’ mode . . . . . . . . . . . . . . . . . . . . . . . . 8
1.17 How to operate the menus . . . . . . . . . . . . . . . . 9
1.18 Messages and errors . . . . . . . . . . . . . . . . . . . . 9
1.19 Configuration menu . . . . . . . . . . . . . . . . . . . 10
1.19.1 Initial set-up . . . . . . . . . . . . . . . . . . . . . 10
1.19.2 Configuration for ‘cn.1’ . . . . . . . . . . . . . . . 10
1.19.3 Configuration for ‘cnq.2’ . . . . . . . . . . . . . . . 11
1.19.4 Configuration for ‘cnI.3’ . . . . . . . . . . . . . . . 11
1.19.5 Configuration for ‘cnc.4’ . . . . . . . . . . . . . . . 11
1.19.6 Configuration for ‘cnd.5’ . . . . . . . . . . . . . . . 12
1.19.7 Configuration for ‘rt.6’ . . . . . . . . . . . . . . . . 12
1.19.8 Configuration for ‘rtq.7’ . . . . . . . . . . . . . . . 12
1.19.9 Configuration for ‘Prd.8’ . . . . . . . . . . . . . . . 13
1.19.10 Sensor configuration . . . . . . . . . . . . . . . . 13
1.19.11 Alarms . . . . . . . . . . . . . . . . . . . . . . . . 15
1.19.12 Fast access . . . . . . . . . . . . . . . . . . . . . . 16
1.19.13 Super fast access . . . . . . . . . . . . . . . . . . 16
1.19.15 Menu ‘On Power Up’ . . . . . . . . . . . . . . . . 16
1.19.14 Menu ‘Key LE’ . . . . . . . . . . . . . . . . . . . . 16
1.19.16 Menus ‘Overrange / underrange’ . . . . . . . . . 17
1.19.17 Left zeros . . . . . . . . . . . . . . . . . . . . . . 17
1.19.18 Vexc. control . . . . . . . . . . . . . . . . . . . . 17
1.19.19 Function ‘Password’ . . . . . . . . . . . . . . . . 17
1.19.20 Factory reset . . . . . . . . . . . . . . . . . . . . 17
1.19.21 Firmware version . . . . . . . . . . . . . . . . . . 17
1.19.22 Brightness . . . . . . . . . . . . . . . . . . . . . . 17
1.19.23 Access to optional modules . . . . . . . . . . . . 17
1.20 Full configuration menu . . . . . . . . . . . . . . . . . 18
1.21 Factory configuration . . . . . . . . . . . . . . . . . . 21
1.22 To access the instrument . . . . . . . . . . . . . . . . 22
1.23 Modular system . . . . . . . . . . . . . . . . . . . . . 22
1.24 Precautions on installation . . . . . . . . . . . . . . . 23
1.25 CE declaration of conformity . . . . . . . . . . . . . . 23
2. Output and control modules . . . . . . . . . . . . . . . . . 24
2.1 Módules R1, T1 and SSR . . . . . . . . . . . . . . . . . 24
2.2 Module AO . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.2.1 Configuration menu . . . . . . . . . . . . . . . . . . 26
2.2.2 Error codes . . . . . . . . . . . . . . . . . . . . . . . 26
2.2.3 Factory configuration . . . . . . . . . . . . . . . . . 26
2.3 Module RTU . . . . . . . . . . . . . . . . . . . . . . . . 27
2.3.1 Accessible registers . . . . . . . . . . . . . . . . . . 27
2.3.2 Configuration menu . . . . . . . . . . . . . . . . . . 28
2.3.3 Exception codes . . . . . . . . . . . . . . . . . . . . 28
2.3.4 Description and example for Modbus RTU registers 29
2.4 Module S4 . . . . . . . . . . . . . . . . . . . . . . . . . 30
2.4.1 Accessible registers . . . . . . . . . . . . . . . . . . 30
2.4.2 Configuration menu . . . . . . . . . . . . . . . . . . 31
2.4.3 Factory configuration . . . . . . . . . . . . . . . . . 31
2.4.4 Frame types . . . . . . . . . . . . . . . . . . . . . . 32
2.4.5 Frame structure . . . . . . . . . . . . . . . . . . . . 32
2.4.6 Error codes . . . . . . . . . . . . . . . . . . . . . . . 32
2.4.7 Frame examples . . . . . . . . . . . . . . . . . . . . 33
2.4.8 CRC calculation . . . . . . . . . . . . . . . . . . . . 33
2.5 Module S2 . . . . . . . . . . . . . . . . . . . . . . . . . 34
2.6 Modules R2, R4 and R6 . . . . . . . . . . . . . . . . . . 34
2.6.1 Configuration menu . . . . . . . . . . . . . . . . . . 35
2.6.2 Factory configuration . . . . . . . . . . . . . . . . . 35
3. How to open and close . . . . . . . . . . . . . . . . . . . . 36
3.1 How to open the housing . . . . . . . . . . . . . . . . . 36
3.2 How to close the housing . . . . . . . . . . . . . . . . . 37
4
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.1 How to order
Model
DPF20
Power
- HV
-HV
-LV
Option 1
-
(85-265 Vac/dc)
(11/60 Vdc,
24 Vac, 48 Vac)
Option 2
-R1
-AO
-RTU
-S4
-S2
-T1
-SSR
-
Option 3
-
Others
-NBT
-GN
(1 relay)
(analog output)
(Modbus RTU)
(RS-485)
(RS-232)
(1 transistor)
(1 SSR drive)
(empty)
1.2 Impulse counter modes
(no buttons)
(green led)
1.5 Functions included
The instrument allows for 5 selectable impulse counter modes :
• Counter (‘cn.1’) (see section 1.19.2)
• Counter quadrature (‘cnq.2’) (see section 1.19.3)
• Counter with inhibition (‘cnI.3’) (see section 1.19.4)
• Counter with control add / substract (‘cnc.4’) (see section 1.19.5)
• Counter differential (‘cnd.5’) (see section 1.19.6)
Configurable up or down counting, ‘reset’ at rear terminals, front key
and/or at alarm activation. Configurable ‘Preset’ value. Relay activation and deactivation delays.
Alarm functions with ‘return to preset’ or ‘reset to 0’ generate cycles
of counting (instrument counts from ‘preset’ value to alarm value
in never ending cycle). The instrument provides memory of cycles
counter.
Scalable reading with configurable multiplier factor (1 to 999999)
and configurable divider factor (1 to 999999). Memory retention in
case or power loss. Retains configuration and last reading.
Counting frequency up to 250 KHz, in ‘FAST’ mode (see section 1.16).
Functions included
Section
‘Fast access’
yes
‘SLOW’ mode
yes, for slow frequencies
1.15
‘FAST’ mode
yes, for fast counting
1.16
Multiplier and divider
from 1 to 999999
Reset configurable
yes (front, rear and linked
to alarm activation)
Preset
yes
1.19.2
Trigger level
configurable
1.19.10
‘Trigger Sense’ function
helps to set the trigger
Sensor selection
by menu
Cycle counter
1.19.12
1.19.2
1.19.14 and
1.10 and
1.19.11
1.13
1.19.10
1.14
1.3 Ratemeter modes
Retention memory
yes, recovers with power
In ratemeter mode the reading is proportional to the measured frequency. The instrument allows for 2 selectable ratemeter modes :
• Ratemeter (‘rt.6’) (see section 1.19.7)
• Ratemeter quadrature (‘rtq.7’) (see section 1.19.8)
The ratemeter mode has a single input channel, with scalable reading. The quadrature ratemeter mode has 2 inpur channels available
for detection of sense of turn when working with quadrature signals.
Scalable reading with configurable multiplier factor (1 to 999999)
and configurable divider factor (1 to 999999).
For low frequency applications, the ‘SLOW’ mode provides the best
response time for each application (see section 1.15).
Maximum frequency up to 500 KHz and minimum frequency down
to de 0.001 Hz (1 mHz) with ‘SLOW’ mode active.
‘On Power Up’
yes
1.19.15
Excitation voltage
configurable
1.19.10
Display filters
recursive
Memory
max., min., cycles
1.19.12
Password
blocks access to configuration menu
1.19.19
Alarms
double setpoints
activation delays
deactivation delays
hysteresis
inverted relays
locked alarms
1.19.11
Display brightness
5 levels
1.19.22
1.4 Periodmeter mode
Reading is proportional to the signal period. Scalable reading with
configurable multiplier factor (1 to 999999) and configurable divider
factor (1 to 999999).
For applications with long periods (slow frequencies), the ‘SLOW’
mode provides the best response time for each application (see section 1.15).
Table 1 - Functions included
5
1.11
1.19.7 and
1.19.8 and
1.19.9
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.6 Front view
1.9 Rear view
Option 3
Alarms
Logo
Button ‘LE’
Front reset
(see section 1.19.14)
Option 1
Option 2
Units
Button ‘UP’
‘Fast access‘
(see section 1.19.12)
Signal
(see section 1.10)
Button ‘SQ’
‘Configuration menu’
(see section 1.19)
Detail of the plug-in screw terminals provided with
the instrument. The instrument is provided with all
terminals needed, both male and female.
1.7 Power connections
Earth connection - Although a
terminal is provided for earth
connection, this connection is
optional. The instrument does
not need earth connection for
correct operation nor for compliance with the security regulations.
Power
(see section 1.7)
8 9 0
1.10 Signal connections
~
+
~
-
1 2 3 4 5
Reset
Fuse - To comply with security regulation 61010-1, add to the power
line a protection fuse acting as disconnection element, easily accessible to the operator and identified as a protection device.
Power ‘H’
fuse 250 mA time lag
Power ‘L’
fuse 400 mA time lag
Canal B
Canal A
Vexc.
0V
1.8 Sensor configuration and connections
Selecting one of the sensors listed at the
‘SnSr’ menu entry, will configure the sensor parameters to the values indicated in
the table.
The table also indicates the typical connections for each type of sensor. Parameters can be manually modified.
Connections are indicated for a single sensor connected to the channel A. For two
sensors (for inhibition control, quadrature
signal, etc) apply the same connection criteria also to channel B.
Note : indicated values are typical values.
Check the correct specifications with your
sensor datasheet and adapt the required
configuration and connections as needed.
Sensor
Connections
Pulls
Mechanical contact 0 V
channel A
pull-up
Namur
channel A Vexc
pull-down
Vexc.
Antirrebound
filter
Trigger
100 mSec.
2,5 Vdc
9 Vdc
no
3,0 Vdc
no
NPN 2 wires
0V
channel A
pull-up
18 Vdc
no
2,5 Vdc
NPN 3 wires
0V
channel A Vexc
pull-up
18 Vdc
no
2,5 Vdc
PNP 2 wires
0V
channel A
pull-down
18 Vdc
no
2,5 Vdc
PNP 3 wires
0V
channel A Vexc
pull-down
18 Vdc
no
2,5 Vdc
Push-pull
0V
channel A Vexc
no
18 Vdc
no
2,5 Vdc
TTL
CMOS
Pick-up
0V
channel A
no
5 Vdc
no
2,5 Vdc
AC<30 Vp
Inductive
0V
channel A
no
no
no
0 Vdc
Table 2 - Configuration and connections for different types of sensors.
6
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.11 Technical specifications
Digits
number of digits
led
color
digit height
6
7 segments led
red or green
14 mm
Reading
maximum reading
minimum reading
decimal point
999999
-199999
configurable X.X.X.X.X.X.
overrange / underrange
display refresh
yes, retains reading value in case of power loss
Signals accepted
NPN, PNP, Namur, pick-up, TTL, inductive, mechanical, quadrature, ...
±30 Vdc
2K4 with pull-up or pull-down resistor
470K without pull resistor
Accuracy of the quartz
Thermal drift
±0.01 %
20 ppm / ºC
Excitation voltage
output voltage
maximum current
protection
configurable
+18 Vdc, +15 Vdc, +9 Vdc, +5 Vdc
70 mA
yes, current limited to 70 mA
Frequencies
counter modes (see Table 3)
ratemeter modes (see Table 4)
periodmeter modes (see Table 5)
Power
power ‘H’
power ‘L’
isolation*
consumption
Section
‘FAST’ mode active max. 250 KHz
1.19.2
normal mode
max. 9 KHz
1.19.2
Counter + inhibition
max. 9 KHz
1.19.4
Counter + control A/S
max. 9 KHz
1.19.5
Counter differential
max. 9 KHz
1.19.6
mode x1
max. 17 KHz
1.19.3
mode x2
max. 16 KHz
1.19.3
mode x4
max. 11 KHz
1.19.3
Counter
quadrature
Mode
Table 3 - Maximum input frequency for counter modes
Ratemeter
Ratemeter
Ratemeter
quadrature
Mode
Frequency
Section
normal mode
max. 500 KHz
1.19.7
‘SLOW’ mode active
max. 200 Hz
min. 1 mHz
1.19.7
mode x1
max. 17 KHz
1.19.8
mode x2
max. 16 KHz
1.19.8
mode x4
max. 11 KHz
1.19.8
Table 4 - Maximum and minimum input frequency for ratemeter modes
Periodmeter
85 to 265 Vac/dc
11 to 60 Vdc and 24/48 Vac
2500 Veff with power ‘H’
1500 Veff with power ‘L’
*tested for 60 sec.
<1.5 W only meter
<4.0 W meter with options
Configuration
3 buttons front keypad
Front protection
IP65
Periodmeter
Mode
Frequency
Section
normal mode
max. 500 KHz
1.19.9
‘SLOW’ mode active
max. 200 Hz
min. 1 mHz
(1000 sec.)
1.19.9
Table 5 - Maximum and minimum input frequency for periodmeter modes
1.12 Mechanical dimensions (mm) (in)
Output and control options relays, analog outputs, serial communications (see section 2)
Mechanical
mounting
panel
connections
plug-in screw terminal
housing material
ABS, polycarbonate (V0)
weight
<150 grams
front size
96 x 48 mm (1/8 DIN)
panel cut-out
92 x 44 mm
depth from panel
91 mm (including terminals)
Temperature
operation
storage
warm-up time
Frequency
Counter
configurable to flash, reset or preset (see
section 1.19.16)
15 readings / second
memory retention
Max. Vdc at input
Input impedance
Counter
48
(1.89)
96
(3.78)
16
(0.63)
44
(1.74)
from 0 to +50 ºC
from -20 to +70 ºC
15 minutes
75
(2.95)
Panel
cut-out
92
(3.63)
7
8
(0.31)
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.13 Function ‘Trigger Sense’
The trigger level is automatically configured when selecting a sensor
from the ‘Sensor / Configuration’ (‘SnSr’ / ‘Auto’) menu list. The trigger level can be also manually modified from the ‘SnSr’ / ‘TrIG’ menu
entry. The selected value applies to channels ‘A’ and ‘B’ (the reset has
a fixed trigger level at 2.5 Vdc).
Vdc
Trigger level
At the ‘SnSr’ / ‘TrIG’ menu, the instrument shows the trigger level
and two vertical leds to the left. These leds inform in real time about
the status (‘0’ or ‘1’) of the input channels ‘A’ and ‘B’. When the led
switches between up and down position, it indicates that impulses
are being detected at the input. If the instrument does not detect
impulses, the led positions remain fixed.
Time
‘1’
Increase the trigger level pressing key ‘UP’ (5) and decrease pressing key ‘LE’ (3).
‘0’
Signal detected
channel ‘A’
channel ‘B’
Status ‘1’
Status ‘0’
Trigger level
Leds of the ‘Trigger
Sense’ function
1.14 Function ‘cycle counter’
1.15 ‘SLOW’ mode
The counter modes allow to activate a reset function (to ‘0’ or to
‘preset’ value) when an alarm setpoint is reached. With this configuration, the instrument counts in cycles, counting from the instrument
preset value up to the alarm setpoint. Each cycle is counted and accumulated into an internal memory, accessible through the ‘fast access’ menu (key UP (5) (see section 1.19.12)).
Special working mode for applications with low frequency signals.
Applies to ratemeter (‘rt.6’), ratemeter quadrature (‘rtq.7’) and periodmeter (‘Prd.8’). The ‘SLOW’ mode allows to measure slow frequencies down to 1 mHz (0,001 Hz) and is functional up to 200 Hz.
The ‘SLOW’ mode provides the fastest response time possible for a
given application, calculating the frequency and the period based on
the time between consecutive impulses.
To reset the memory of cycles, visualize the value at the ‘uP’ menu,
then press the (5) key and the ‘rSt’ message appears. Press (<) to
reset.
Reading
Impulse counter, with ‘reset to preset’
when setpoint 1 is reached
The ‘SLOW’ mode needs to define the parameter ‘maximum waiting
time’ to a value between 1 and 1000 seconds. If this time expires
without a single impulse being received, the reading jumps to ‘0’
(both for ratemeter and periodmeter modes). The ‘GATE’ parameter
is not used if ‘SLOW’ mode is active.
Setpoint 1
In ‘ratemeter quadrature’ (‘rtq.7’) mode, the activation of the
‘SLOW’ mode calculates the frequency based on the time between
consecutive impulses received on channel A, and calculates the
sense of turn (clockwise or counter-clockwise) by comparing each
impulse with the state of channel B. The ‘edge’ parameter is fixed to
a ‘1--1’. Typical application for quadrature frequency measure with
two inductive sensors at low frequency.
Preset
Time
Cycle counter
0
1
2
3
1.16 ‘FAST’ mode
Time
Special working mode for counter applications with high frequency
signals, up to 250 KHz. Applies only to the counter mode (‘cn.1’).
The activation of the ‘FAST’ mode configures the signal detection by
rising edge. The first edge detected, either rising or falling edge, after
the instrument restart (power-up, or configuration change) is used
for internal initialization and will not be counted as impulse.
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DPF20 Frequency, rate, total or period counter
Instruction Manual
1.17 How to operate the menus
Example of operation inside the
‘configuration menu’.
The instrument has two menus accessible to the user :
‘Configuration menu’ (key SQ) (<)
(1)
(6)
‘Fast access’ menu (key UP) (5)
(2)
(5)
Configuration menu
Function mode
The ‘configuration menu’ modifies the configuration parameters to
adapt the instrument to the application needs. To access the ‘configuration menu’ press for 1 second the SQ (<) key. This access can
be blocked by activating the ‘Password’ (‘PASS’) function. While
operating the ‘configuration menu’, the alarm status is ‘hold’ to the
status they had before accessing the menu, and the output and control modules remain in ‘error’ state. When leaving the ‘configuration
menu’, the instrument applies a system reset, followed by a brief
disconnection of the alarms and the output and control modules.
Functionality is then recovered.
(3)
(4)
1. The SQ (<) key enters into the
‘configuration menu’.
(4)
2. The SQ (<) key enters into the
‘Func’ option menu.
(3)
(5)
(3)
(4)
(5)
(3)
(4)
(5)
(6)
(3)
(3)
(3)
For a detailed explanation on the ‘configuration menu’ see section
1.19, and for a full view of the ‘configuration menu’ structure see
section 1.20.
3. The UP (5) key moves through
the menu options.
4. The SQ (<) key selects the
desired range and returns to the
‘Func’ menu.
5. The LE (3) key leaves the actual menu level and moves to the
previous menu level.
6. The LE (3) key leaves the ‘configuration menu’. Changes are applied and saved at this moment.
‘Fast access’ menu
The ‘fast access’ menu is an operator configurable menu, providing
fast and direct access to the most usual functions of the instrument
with a single key pad stroke. Press key UP (5) to access this menu.
1.18 Messages and errors
The error messages are shown on display in flash mode.
See section 1.19.12 for a list of functions eligible for ‘fast access’ in
this instrument. The ‘Password’ (‘PASS’) function does not block access to this menu. Accessing and modifying parameters in the ‘fast
access’ menu does not interfere with the normal functionality of the
instrument, and it does not generate any system reset when validating the changes.
Messages and errors
‘Err.1’
incorrect password.
‘Err.2’
at ‘oPt.X’ menu entry. Installed module is not recognized.
Front key pad description
‘Err.8’
excitation voltage overload.
Key SQ (<) - press the SQ (<) key for 1 second to access the ‘configuration menu’. Inside the menu, the SQ (<) key functions as a
‘ENTER’ key. It selects and accesses the menu option currently displayed. At menus with numerical value entries, it validates the number displayed.
‘999999’ + flashing mode. Reading is in overrange.
‘-199999’ + flashing mode. Reading is in underrange.
Table 6 - Messages and error codes
Key UP (5) - the UP (5) key gives access to the ‘fast access’ menu.
Inside the menus, it moves vertically through the different menu options. At menus with numerical value entries, it modifies the digit
selected by increasing its value to 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
Key LE (3) - inside the menus, the LE (3) key functions as the ‘ESCAPE’ key. It leaves the selected menu, and eventually, will leave the
whole menu. When leaving the ‘configuration menu’ with the LE (3)
key, the changed parameters are activated. At menus with numerical value entries, the LE (3) key allows to select the active digit. To
modify the value of the selected digit use the UP (5) key.
Menu ‘rollback’
After 30 seconds without interaction from the operator, the instrument will rollback and leave the ‘configuration menu’ or the ‘fast access’ menu. All changes will be discarded.
9
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.19 Configuration menu
1.19.1 Initial set-up
Press ‘SQ’ (<) for 1 second to access the ‘configuration menu’.
For a description on how to operate inside the menus see section
1.17. For a full vision of the ‘configuration menu’ structure see
section 1.20.
To configure the initial set up of the instrument, select the function
mode, the decimal point position, scale the reading and configure
the mode selected and the sensor.
Counter
Function
mode
Enter the ‘Function mode’ (‘Func’) menu and select the desired function, from the 5 counting modes, 2 ratemeter modes and the periodmeter mode available.
Counter quadrature
Counter + inhibition
• ‘Counter’ (‘cn. 1’) - normal counter mode. Impulses input at channel A. Channel B disabled.
Counter + control add / substract
• ‘Counter quadrature’ (‘cnq.2’) - counter mode for quadrature signals. Impulses input at channel A and B, in quadrature.
Counter differential
Ratemeter
• ‘Counter + inhibition’ (‘cnI.3’) - counter mode with inhibition control. Impulses input at channel A. Inhibition control on channel B.
Ratemeter quadrature
• ‘Counter + control add / substract’ (‘cnc.4’) - counter mode with
control for add / substract. Impulses input at channel A. Control for
the add or substract function on channel B.
Periodmeter
• ‘Counter differential’ (‘cnd.5’) - counter mode with differential
function. Impulses received at channel A add. Impulses received at
channel B substract.
• ‘Ratemeter’ (‘rt.6’) - ratemeter mode. Impulses input at channel
A. Channel B disabled.
• ‘Ratemeter quadrature’ (‘rtq.7’) - ratemeter mode for quadrature
signals. Impulses input at channel A and B, in quadrature.
• ‘Periodmeter’ (‘Prd.8’) - periodmeter mode. Impulses input at
channel A. Channel B disabled.
Access the ‘Decimal point’ (‘dP’) menu to select the decimal point
position. Move the decimal point by pressing the ‘LE’ (3) key.
Decimal point
Configure the function mode selected (‘cnF.2’ to ‘cnF.8’). See sections 1.19.2 to 1.19.9.
Configure the sensor at the ‘SnSr’ menu. See section 1.19.10.
The next menu accesses the configuration parameters for the ‘function mode’ (‘Func’)
selected. Configuration parameters are slightly different for each ‘function mode’. In
the next entries, all 7 possible configuration menus are explained, ‘cnF.1’ to ‘cnF.7’, one
for each ‘function mode’.
Configuration
counter
Multiplier
Divider
Preset
1.19.2 Configuration for ‘cn.1’
Multiplier
1 to 999999
Configuration menu for mode ‘counter’ (‘cn.1’). Total impulses received are multiplied by the value of the ‘multiplier’ (‘MuLt’) register
and divided by the ‘divider’ (‘dIV’) register. Result is refreshed on the
display.
Divider
1 to 999999
Preset value
-199999 to 999999
• assign the value for parameter ‘Divider’ (‘dIV’) from 1 to 999999.
Up
Mode
• assign the value for parameter ‘Multiplier’ (‘MuLt’) from 1 to
999999.
• assign the value for ‘Preset’ (‘PrSt’) from -199999 to 999999. Reset
activation loads on display the preset value.
Down
• select the counting mode (‘ModE’) to ‘uP’ for upwards counting
(impulses received add) or ‘doWn’ for downwards counting (impulses received substract).
‘FAST’ mode
• to activate the ‘FAST’ mode (‘FASt’) select ‘on’. See section 1.16 for
more information on the ‘FAST’ mode.
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DPF20 Frequency, rate, total or period counter
Instruction Manual
1.19 Configuration menu (cont.)
1.19.3 Configuration for ‘cnq.2’
Conf. counter
quadrature
Multiplier
Divider
Preset
Multiplier
1 to 999999
Configuration menu for mode ‘counter quadrature’ (‘cnq.2’). Total impulses received are multiplied by the value of the ‘multiplier’
(‘MuLt’) register and divided by the ‘divider’ (‘dIV’) register. Result is
refreshed on the display.
Divider
1 to 999999
Valor del preset
-199999 to 999999
2 imp. per cycle
• select the ‘edges’ to count for each quadrature cycle (‘q.124’). Select ‘1--1’ for 1 impulse per quadrature cycle. Select ‘1--2’ for 2 impulses per quadrature cycle. Select ‘1--4’ for 4 impulses per quadrature cycle.
4 imp. per cycle
Conf. counter
+ inhibition
Multiplier
Divider
Preset
1.19.4 Configuration for ‘cnI.3’
Multiplier
1 to 999999
Configuration menu for mode ‘counter + inhibition control’ (‘cnI.3’).
Total impulses received are multiplied by the value of the ‘multiplier’
(‘MuLt’) register and divided by the ‘divider’ (‘dIV’) register. Result is
refreshed on the display.
Divider
1 to 999999
Valor del preset
-199999 to 999999
Inhibition
Configuration
counter + control
add / substract
Multiplier
Divider
Preset
Control A/S
• assign the value for parameter ‘Multiplier’ (‘MuLt’) from 1 to
999999.
• assign the value for parameter ‘Divider’ (‘dIV’) from 1 to 999999.
Up
Mode
• assign the value for parameter ‘Divider’ (‘dIV’) from 1 to 999999.
• assign the value for ‘Preset’ (‘PrSt’) from -199999 to 999999. Reset
activation loads on display the preset value.
1 imp. per cycle
Edges
• assign the value for parameter ‘Multiplier’ (‘MuLt’) from 1 to
999999.
• assign the value for ‘Preset’ (‘PrSt’) from -199999 to 999999. Reset
activation loads on display the preset value.
Down
• select the counting mode (‘ModE’) to ‘uP’ for upwards counting
(impulses received add) or ‘doWn’ for downwards counting (impulses received substract).
Inhibits if channel B is high
Inhibits if channel B is 0 Vdc
• select the activation mode for the ‘inhibition’ (‘Inh’) control. Select
‘on_h’ to inhibit the counting when channel B is at logical state ‘1’.
Select ‘on_0’ to inhibit the counting when channel B is at logical state
‘0’.
1.19.5 Configuration for ‘cnc.4’
Multiplier
1 to 999999
Divider
1 to 999999
Configuration menu for mode ‘counter + control add / substract’
(‘cnc.4’). Total impulses received are multiplied by the value of the
‘multiplier’ (‘MuLt’) register and divided by the ‘divider’ (‘dIV’) register. Result is refreshed on the display.
Valor del preset
-199999 to 999999
• assign the value for parameter ‘Multiplier’ (‘MuLt’) from 1 to
999999.
Adds if channel
B is high
Adds if channel
B is 0 Vdc
• assign the value for parameter ‘Divider’ (‘dIV’) from 1 to 999999.
• assign the value for ‘Preset’ (‘PrSt’) from -199999 to 999999. Reset
activation loads on display the preset value.
• select the activation mode for the ‘control add / substract’ (‘Add’).
Select ‘on_h’ activates the addition of impulses received on channel A when channel B is at logical state ‘1’ (impulses on channel A
substract if channel B is at logical state ‘0’). Select ‘on_0’ activates
the addition of impulses received on channel A when channel B is
at logical state ‘0’ (impulses on channel A substract if channel B is at
logical state ‘1’).
11
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.19 Configuration menu (cont.)
1.19.6 Configuration for ‘cnd.5’
Configuration
counter
differential
Multiplier
1 to 999999
Multiplier
Divider
1 to 999999
Divider
Preset value
-199999 to 999999
Preset
Conf. ratemeter
Configuration menu for mode ‘counter differential’ (‘cnd.5’). Total impulses received are multiplied by the value of the ‘multiplier’
(‘MuLt’) register and divided by the ‘divider’ (‘dIV’) register. Result is
refreshed on the display.
Impulses received on channel A add. Impulses received on channel
B substract.
Divider
1 to 999999
Divider
• assign the value for parameter ‘Divider’ (‘dIV’) from 1 to 999999.
• assign the value for ‘Preset’ (‘PrSt’) from -199999 to 999999. Reset
activation loads on display the preset value.
Multiplier
1 to 999999
Multiplier
• assign the value for parameter ‘Multiplier’ (‘MuLt’) from 1 to
999999.
1.19.7 Configuration for ‘rt.6’
Seconds
Configuration menu for mode ‘ratemeter’ (‘rt.6’). Frequency measured is multiplied by the value of the ‘multiplier’ (‘MuLt’) register
and divided by the ‘divider’ (‘dIV’) register. Result is refreshed on the
display. Measure is updated at the rate defined on the ‘GATE’ register.
Time window
• assign the value for parameter ‘Multiplier’ (‘MuLt’) from 1 to
999999.
• assign the value for parameter ‘Divider’ (‘dIV’) from 1 to 999999.
• select the value for the ‘Time window’ (‘GAtE’). Available values
are : 0.5, 1.0, 2.0, 4.0, 8.0 or 16.0 seconds. The time window defines
the display refresh time. This parameter has no effect if the ‘SLOW’
mode is active.
Max. waiting time
‘SLOW’ mode
• for slow frequencies activate the ‘SLoW’ parameter configuring the
‘tIME’ parameter between 1 and 1000 seconds. Configure the ‘nuMb’
parameter between 1 and 32 impulses. See section 1.15 for more information on the ‘SLoW’ mode.
Number of pulses
Average filter
Conf. ratemeter
quadrature
Multiplier
Divider
Filter strength
(0 = disabled)
• in case of unstable signals, activate the ‘average filter’ (‘AVr’) function. It activates a recursive filter on the reading. the filter is stronger
for higher values, from 0.0 to 99.9.
Multiplier
1 to 999999
1.19.8 Configuration for ‘rtq.7’
Divider
1 to 999999
Configuration menu for mode ‘ratemeter quadrature’ (‘rtq.7’).
Frequency measured is multiplied by the value of the ‘multiplier’
(‘MuLt’) register and divided by the ‘divider’ (‘dIV’) register. Result is
refreshed on the display. Measure is updated at the rate defined on
the ‘GATE’ register.
Seconds
Time window
• assign the value for parameter ‘Multiplier’ (‘MuLt’) from 1 to
999999.
• assign the value for parameter ‘Divider’ (‘dIV’) from 1 to 999999.
• select the value for the ‘Time window’ (‘GAtE’). Available values
are : 0.5, 1.0, 2.0, 4.0, 8.0 or 16.0 seconds. The time window defines
the display refresh time. This parameter has no effect if the ‘SLOW’
mode is active.
1 imp. per cycle
Edges
• select the ‘edges’ to count for each quadrature cycle (‘q.124’). Select ‘1--1’ for 1 impulse per quadrature cycle. Select ‘1--2’ for 2 impulses per quadrature cycle. Select ‘1--4’ for 4 impulses per quadrature cycle.
2 imp. per cycle
4 imp. per cycle
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DPF20 Frequency, rate, total or period counter
Instruction Manual
1.19 Configuration menu (cont.)
• for slow frequencies activate the ‘SLoW’ parameter configuring the
‘tIME’ parameter between 1 and 1000 seconds. Configure the ‘nuMb’
parameter between 1 and 32 impulses. See section 1.15 for more information on the ‘SLoW’ mode.
Max. waiting time
‘SLOW’ mode
Number of pulses
Average filter
Conf.
Periodmeter
• in case of unstable signals, activate the ‘average filter’ (‘AVr’) function. It activates a recursive filter on the reading. the filter is stronger
for higher values, from 0.0 to 99.9.
Filter strength
(0 = disabled)
1.19.9 Configuration for ‘Prd.8’
Multiplier
1 to 999999
Multiplier
Configuration menu for mode ‘periodmeter’ (‘Prd.8’). Period measured is multiplied by the value of the ‘multiplier’ (‘MuLt’) register
and divided by the ‘divider’ (‘dIV’) register. Result is refreshed on the
display. Measure is updated at the rate defined on the ‘GATE’ register.
Divider
1 to 999999
Divider
Seconds
• assign the value for parameter ‘Multiplier’ (‘MuLt’) from 1 to
999999.
Time window
• assign the value for parameter ‘Divider’ (‘dIV’) from 1 to 999999.
• select the value for the ‘Time window’ (‘GAtE’). Available values
are : 0.5, 1.0, 2.0, 4.0, 8.0 or 16.0 seconds. The time window defines
the display refresh time. This parameter has no effect if the ‘SLOW’
mode is active.
• for long periods activate the ‘SLoW’ parameter configuring the
‘tIME’ parameter between 1 and 1000 seconds. Configure the ‘nuMb’
parameter between 1 and 32 impulses. See section 1.15 for more information on the ‘SLoW’ mode.
Max. waiting time
‘SLOW’ mode
• in case of unstable signals, activate the ‘average filter’ (‘AVr’) function. It activates a recursive filter on the reading. the filter is stronger
for higher values, from 0.0 to 99.9.
Number of pulses
Average filter
Filter strength
(0 = disabled)
1.19.10 Sensor configuration
Mechanical contact
Sensor
Automatic conf.
The sensor configuration menu (‘SnSr’) provides configuration for
the input section of the instrument, the excitation voltage and the
trigger level, for accurate detection of the impulses.
Namur
NPN 2 wire
• ‘Automatic configuration’ (‘Auto’) - if a standard sensor is used,
select one of the sensors provided at the ‘Auto’ menu list. The instrument will automatically configure the parameters according to Table
2 (see section 1.8). If this configuration does not detect impulses,
manually modify the values for the parameters indicated below.
NPN 3 wire
PNP 2 wire
PNP 3 wire
Push pull
TTL
CMOS
Pick-up
Inductive
Vac <30 V
13
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.19 Configuration menu (cont.)
Pull-down
• ‘Pulls on channel A’ (‘PuL.A’) - activates pull resistors at channel A. Select ‘P.uP’ to activate pull-up resistors (needed for NPN
sensors). Select ‘P.dn’ to activate pull-down resistors (needed PNP
sensors). Pull-up and pull-down selection configure the trigger level
to 2,5 Vdc.
No pull resistor
• ‘Pulls on channel B’ (‘PuL.b’) - see previous menu entry ‘Pulls on
channel A’.
No pull resistor
Pulls on channel A
Pulls on channel B
Pull-up
• ‘Pulls on reset’ (‘PuL.r’) - see previous menu entry ‘Pulls on channel
A’. Trigger level for reset channel is fixed to 2,5 Vdc.
Pull-up
Pull-down
• ‘trigger level’ (‘trIG’) - input signal value in Vdc at which the instrument detects impulse. Selectable between 0,0 and 3,9 Vdc. Trigger level is the same for channels A and B. Trigger level for reset
channel is fixed at 2,5 Vdc. The two leds at the left of the trigger
level are part of the ‘Trigger Sense’ utility for easy location of the
proper trigger level (see section 1.13).
No pull resistor
Pulls on reset
Pull-up
• ‘Activation for channel A’ (‘Act.A’) - configures the activation of
channel A by rising edge (‘on_h’) or by falling edge (‘on_0’)
Pull-down
Trigger level
• ‘Activation for reset channel’ (‘Act.r’) - configures the activation of the reset channel by rising edge (‘on_h’) or by falling edge
(‘on_0’)
Trigger level (from
0.0 Vdc a 3.9 Vdc).
See section 1.15
for ‘Trigger Sense’
utility
• ‘Excitation voltage’ (‘V.EXc’) - configures the value of the excitation voltage at 5 Vdc, 9 Vdc, 15 Vdc and 18 Vdc. Select ‘no’ to disable
the excitation voltage.
• ‘Antirrebound filter’ (‘rbnd’) - the antirrebound filter blocks additional rebounds (typically from a mechanical contact sensor) from
the same single impulse, preventing that a single impulse counts
for more than 1. Value between 0 mSeconds and 1000 mSeconds.
When an impulse is received, impulse detection is disabled for the
duration of the time configured in this parameter. After time has
passed, impulse detection is enabled again. Recommended value
for a mechanical contact : 100 mSeconds.
by rising edge
Activation for
channel A
by falling edge
by rising edge
Activation for
reset
by falling edge
Excitation voltage
Antirrebound
Antirrebound filter
(0 to 1000 mSec.)
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DPF20 Frequency, rate, total or period counter
Instruction Manual
1.19 Configuration menu (cont.)
1.19.11 Alarms
Alarms
Alarm 1
The ‘Alarms’ (‘ALr’) menu configures the independent activation of
up to 3 relay outputs (or transistor or SSR drive control), installed
with the R1 optional modules (or T1 or SSR) (see section 2.1). For
outputs up to 4 and 6 relays, see special modules R2, R4 and R6 at
section 2.6. The alarm states are indicated in the front display with
leds marked as ‘1’, ‘2’ and ‘3’.
To configure an alarm, enter into the alarm menu (‘ALr1’, ‘ALr2’ or
‘ALr3’) and configure the following parameters :
• select ‘Active’ (‘Act’) to ‘on’
• at ‘Alarm type’ (‘TypE’) select the alarm to act as a maximum type
alarm (‘MAX’) or a minimum type alarm (‘MIn’). The maximum type
alarm (or minimum type alarm) activates when the display value is
higher (or lower) than the setpoint value.
• at ‘Setpoint’ (‘SEt’) enter the value for the alarm activation point.
This parameter is eligible for configuration through the ‘Fast access’
menu (see section 1.19.12).
• configure the hysteresis value at ‘Hysteresis’ (‘hySt’). The hysteresis applies to the deactivation process of the alarm. The alarm deactivates when the reading has passed the setpoint value plus the
hysteresis value. Hysteresis helps to avoid repetitive switching of the
alarm relays, due to fluctuating input signals around the setpoint.
• at ‘Activation delay’ (‘dEL.0’) configure the delay to apply before
alarm activation. The activation delay starts counting when the setpoint value is passed. Value from 0.0 to 99.9 seconds.
• at ‘Deactivation delay’ (‘dEL.1’) configure the delay to apply
before alarm deactivation. The deactivation delay starts counting
when the setpoint value plus the hysteresis value, is passed. Value
from 0.0 to 99.9 seconds.
• to work with ‘windowed alarms’ (see graphical example below)
activate ‘Setpoint 2’ (‘SEt2’) to ‘on’ and then configure the desired
second setpoint value. Second setpoint must always be higher in
value than the first setpoint.
• the ‘Relay inverted’ (‘r.Inv’) parameter inverts the normal relay
connections. When set to ‘on’ the relay will be active when alarm is
inactive. For security applications where an inactive relay controls
the shutdown of the system.
• the ‘Locked alarm’ (‘A.Lck’) parameter disables the automatic
deactivation of the alarm. Alarm deactivation must be performed
manually, by pressing the ‘LE’ front button (see section 1.19.14)
• the ‘On alarm’ (‘on.AL’) parameter assigns a predefined behaviour when alarm is activated. Select ‘cont’ to continue counting.
Select ‘to_0’ to load ‘0’ on displays. Select ‘to_p’ to load preset
value on display. Parameter ‘dEL.1’ is set to 1 second when ‘to_0’
or ‘to_p’ are selected.
Active
Alarm type
Setpoint
Hysteresis
Activation delay
Deactivation delay
Setpoint 2
Relay inverted
Locked alarm
Continue
On alarm
To zero
To preset
Reading
hysteresis
setpoint
Time
Reading
Alarm as maximum,
no hysteresis, no delays
on
off
Setpoint 2
Time
Setpoint 1
on
off
on
off
activation
delay
Alarm as maximum,
with hysteresis and delays
Time
deactivation
Time
delay
on
Alarm as minimum,
no hysteresis, no delays
Time
off
15
Alarm as minimum,
with double setpoint,
no hysteresis, no delays
Time
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.19 Configuration menu (cont.)
1.19.12 Fast access
The ‘UP’ (5) key at the front of the instrument gives access to a list of functions configurable by the operator. See section 1.17 for an explanation on how
to operate the ‘fast access’ menu.
The ‘Key UP (Fast access)’ (‘K.uP’) menu allows to select which functions will
be accessible through the ‘fast access’ menu. Select ‘on’ to activate each function.
• the ‘Setpoint 1’ (‘ALr1’) function allows to visualize and modify the alarm 1
setpoint through the ‘fast access’ menu.
• the ‘Setpoint 2’ (‘ALr2’) function allows to visualize and modify the alarm 2
setpoint through the ‘fast access’ menu.
• the ‘Setpoint 3’ (‘ALr3’) function allows to visualize and modify the alarm 3
setpoint through the ‘fast access’ menu.
• the ‘Memory of maximum’ (‘MAX’) or ‘Memory of minimum’ (‘MIn’) functions allow to visualize the maximum or minimum reading value stored in
memory. To reset this value, visualize the memory value at the ‘fast access’
menu with key UP (5) and when message ‘rSt’ is displayed, press (<) to reset.
• the ‘Memory of cycles’ (‘cYcL’) function allow to visualize and reset the
memory of cycles. To reset this value, visualize the memory value at the ‘fast
access’ menu with key UP (5) and when message ‘rSt’ is displayed, press (<)
to reset. The memory of cycles countes ‘+1’ each time a reset alarm occurs
(‘on_AL’ / ‘to_0’ or ‘to_P’) or a reset by ‘overrange’ / ‘underrange’ occurs.
• the ‘Preset value’ (‘PrSt’) function allows to visualize and modify the preset
value configured.
Tools
Key UP
(‘fast access’)
Setpoint 1
Setpoint 2
Setpoint 3
Memory of
maximum
Memory of
minimum
Memory of
cycles
Preset value
1.19.13 Super fast access
If only a single function is selected for the ‘fast access’ menu, pressing the the ‘UP’ (5) key will shortly display the function name and
then automatically jump to the function value.
1.19.15 Menu ‘On Power Up’
On power-up
Delay
The ‘On Power Up’ (‘on.Pu’) menu configures functions to apply at start-up. It
applies only to instrument restart after power loss. It does not apply to instrument restart due to change in configuration.
• parameter ‘Delay’ (‘dLAy’) assigns a waiting time in seconds. The instrument
waits the configured time before starting normal function. During this waiting
time, the display shows all decimal points on in flash mode, all alarms are in
‘oFF’ state, there is no signal acquisition and there is no communications or
control being performed. After the configured time is over, the instrument
starts in normal function. Delay value between 0 and 200 seconds.
• the ‘Reset’ (‘rSt’) parameter will execute a reset of the counter each time the
instrument is restarted.
Seconds
Reset
Key LE
No function
1.19.14 Menu ‘Key LE’
Front reset
The ‘LE’ (3) key at the front of the instrument can be configured to
activate a function.
• the ‘No function’ (‘nonE’) value assigns no function.
• the ‘Front reset’ (‘F.rSt’) value asigns the reset funtion.
• the ‘Alarm unlock’ (‘A.Lck’) value assigns the manual unlock of the
alarms function, for instruments with the ‘Locked alarms’ (‘A.Lck’)
function activated (see section 1.19.11)
• the ‘Reset and alarm unlock’ (‘Fr.AL’) assigns the two previous
functions to the same button.
Alarm unlock
Reset and alarm unlock
16
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.19 Configuration menu (cont.)
1.19.16 Menus ‘Overrange / underrange’
Flash
Counter
overrange
The ‘Counter overrange’ (‘c.orG’) and ‘Counter underrange’ (‘c.urG’)
parameters configure the behavior of the instrument when reading
is higher than ‘9999’ (overrange) or lower than ‘-1999’ (underrange).
Select ‘FLSH’ to enter reading into flash mode. Select ‘to_0’ to apply
a reset to ‘0’. Select ‘to_P’ to apply a reset to preset value.
To zero
To preset
Flash
Counter
underrange
1.19.17 Left zeros
To zero
The ‘Left zeros’ (‘L.ZEr’) parameter controls the left zeros on or off.
To preset
1.19.18 Vexc. control
With left zeros
Left zeros
The ‘Vexc control’ (‘V.ctr’) parameters enables the ‘Err.8’ message,
when consumption requested to the excitation voltage is higher than
the current the instrument can provide.
Without left zeros
with Vexc. error control
Vexc. control
1.19.19 Function ‘Password’
without Vexc. error control
At the ‘Password’ (‘PASS’) menu select a 6 digit code to block access
to the ‘configuration menu’. Instrument configuration will not be accessible to non authorized personnel. To activate the ‘Password’ select ‘on’ and introduce the code.
Password
The code will be requested when trying to access the ‘configuration
menu’ (key ‘SQ’ (<)). The ‘fast access’ menu is not password protected.
Factory reset
1.19.20 Factory reset
Version
At the ‘Factory reset’ (‘FAct’) menu, select ‘yes’ to load the default
factory configuration for the instrument (see section 1.21).
Minimum
Brightness
1.19.21 Firmware version
Standard
The ‘Version’ (‘VEr’) menu informs of the current firmware version
installed in the module.
Maximum
1.19.22 Brightness
At the ‘Brightness’ (‘LIGh’) menu select the light intensity for the
front leds. With this function it is possible to adapt the instrument to
the environment light intensity.
1.19.23 Access to optional modules
Configuration menu for the module installed at Opt.1
Menus ‘OPt.1’, ‘OPt.2’ and ‘OPt.3’ give access to the ‘configuration
menus’ of the output and control modules installed at slots Opt.1,
Opt.2 and Opt.3.
Configuration menu for the module installed at Opt.2
See section 2 for a list of output and control modules available for
each slot. The ‘configuration menu’ of each module is described at
the User’s Manual of each module.
Option 1
Option 2
Configuration menu for the module installed at Opt.3
Option 3
17
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.20 Full configuration menu
Press ‘SQ’ (<) for 1 second to access the ‘Configuration menu’. See
section 1.19 for a description of each menu entry.
Counter
Function
mode
Conf. counter
+ inhibition
Counter quadrature
Counter + inhibition
Multiplier
Divider
Counter + control add / substract
Preset
Counter differential
Multiplier
1 to 999999
Divider
1 to 999999
Preset value
-199999 to 999999
Up
Ratemeter
Mode
Ratemeter quadrature
Periodmeter
Inhibition
Down
Inhibits if channel B is high
Inhibits if channel B is 0 Vdc
Select with key LE
Decimal point
Configuration
counter + control
add / substract
Configuration
counter
Multiplier
Divider
Preset
Multiplier
Multiplier
1 to 999999
Divider
Divider
1 to 999999
Preset
Preset value
-199999 to 999999
Control A/S
Multiplier
1 to 999999
Divider
1 to 999999
Preset value
-199999 to 999999
Adds if channel
B is high
Adds if channel
B is 0 Vdc
Up
Mode
Down
Configuration
counter
differential
‘FAST’ mode
Conf. counter
quadrature
Multiplier
Divider
Preset
Multiplier
Divider
Preset
Multiplier
1 to 999999
Divider
1 to 999999
Conf. ratemeter
Preset value
-199999 to 999999
Multiplier
Divider
1 imp. per cycle
Edges
Multiplier
1 to 999999
Divider
1 to 999999
Preset value
-1999 to 999999
Multiplier
1 to 999999
Divider
1 to 999999
Seconds
Time window
2 imp. per cycle
4 imp. per cycle
18
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.20 Full configuration menu (cont.)
Max. waiting time
‘SLOW’ mode
Max. waiting time
‘SLOW’ mode
Number of pulses
Average filter
Conf. ratemeter
quadrature
Number of pulses
Filter strength
(0 = disabled)
Average filter
Multiplier
1 to 999999
Multiplier
Mechanical contact
Sensor
Automatic conf.
Divider
1 to 999999
Divider
Filter strength
(0 = disabled)
Namur
NPN 2 wire
NPN 3 wire
Seconds
Time window
PNP 2 wire
PNP 3 wire
Push pull
TTL
CMOS
Pick-up
1 imp. per cycle
Edges
Inductive
2 imp. per cycle
Vac <30 V
4 imp. per cycle
No pull resistor
Max. waiting time
‘SLOW’ mode
Pulls on channel A
Number of pulses
Average filter
Pull-down
Filter strength
(0 = disabled)
No pull resistor
Pulls on channel B
Conf. ratemeter
Multiplier
Divider
Pull-up
Multiplier
1 to 999999
Pull-up
Pull-down
Divider
1 to 999999
No pull resistor
Pulls on reset
Seconds
Pull-up
Time window
Pull-down
Trigger level
19
Trigger level (from
0.0 Vdc a 3.9 Vdc).
See section 1.15
for ‘Trigger Sense’
utility
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.20 Full configuration menu (cont.)
rising edge
Channel A activation
Tools
falling edge
by rising edge
Activation for
reset
Key UP
(‘fast access’)
by falling edge
Setpoint 1
Setpoint 2
Excitation voltage
Setpoint 3
Memory of
maximum
Antirrebound
Memory of
minimum
Antirrebound filter
(0 to 1000 mSec.)
Memory of
cycles
Alarms
Alarm 1
Preset value
Active
Alarm type
On power-up
Setpoint
Delay
Seconds
Reset
Hysteresis
Key LE
No function
Activation delay
Front reset
Deactivation delay
Alarm unlock
Reset and alarm unlock
Setpoint 2
Flash
Relay inverted
Counter
overrange
Locked alarm
To zero
To preset
Continue
On alarm
Flash
To zero
Counter
underrange
To preset
To zero
To preset
20
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.20 Full configuration menu (cont.)
1.21 Factory configuration
Function
Decimal point
Counter configuration
Multiplier
Divider
Preset
Mode
‘FAST’
Sensor
Pulls on channel A
Pulls on channel B
Pulls on reset
Trigger
Activation for channel A
Excitation voltage
Antirrebound filter
Tools
Fast access (Key UP)
‘On Power Up’
Delay
Key ‘LE’
Memory of maximum
Memory of minimum
Memory of cycles
Counter overrange
Counter underrange
Left zeros
Vexc. control
Password
Brightness
Alarms 1,2 and 3
Active
Type
Setpoint
Hysteresis
Activation delay
Deactivation delay
Setpoint 2
On Alarm
Inverted relay
Locked alarms
With left zeros
Left zeros
Without left zeros
with Vexc. error control
Control Vexc.
without Vexc. error control
Password
Factory reset
Version
Minimum
Brightness
Standard
Maximum
Configuration menu for the module installed at Opt.1
Option 1
Configuration menu for the module installed at Opt.2
Option 2
Configuration menu for the module installed at Opt.3
Option 3
counter (‘cn.1’)
no
x1
/1
0
up
off
no pull resistor
no pull resistor
pull-up
2,5 Vdc
on rising edge (‘on_h’)
5 Vdc
0 mSeconds
off
0 seconds
reset function
-199999
999999
0
flash
flash
off
off
off
3
off (disabled)
maximum
1000
0 counts
0.0 seconds
0.0 seconds
off
continue
off
off
Factory configuration for Ratemeter (‘cnF.6) and periodmeter (‘cnF.8)
modes.
Multiplier
Divider
Time windows
‘SLOW’ mode
tIME
nuMb
Recursive filter
x1
/1
0.5
0 (off)
1
0 (off)
Factory configuration for output and control modules, see section 2.
21
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.22 To access the instrument
To open the housing, use a flat screwdriver to free the fixation clips,
if possible, in the following order : D, C, B and A. Remove the front
cover. Let the inside of the instrument slide out of the housing.
To reinsert the instrument make sure that all modules are correctly
connected to the pins on the display module. Place all the set into
the housing, assuring that the modules correctly fit into the internal
guiding slides of the housing. Once introduced, place again the front
cover in front of the housing, placing first corner ‘X’ and then inserting clips ‘A’, ‘B’, ‘C’ and ‘D’ in this order.
See section 3 for a detailed description on how to open and close
the housing.
B
D
C
X
A
Risk of electric shock. Removing the front cover will
grant access to the internal circuits. Disconnect the input signal to prevent electric shock to the operator. Operation must be performed by qualified personnel only.
Observe precautions for handling ESD (electrostatic discharge) sensitive devices
1.23 Modular system
DPF20 panel meters are designed to create a modular system. This
modular system allows for addition, replacement or substitution of
any of the internal modules conforming the instrument. Below is a
graphic explanation for the position of each module.
Front Filter
Display Module
Optional Control Modules
Opt.2
Opt.1
Power Supply Module
Opt.3
Input Signal Module
Housing
22
DPF20 Frequency, rate, total or period counter
Instruction Manual
1.24 Precautions on installation
1.25 CE declaration of conformity
Products
Risk of electrical shock. Instrument terminals can be connected
to dangerous voltage.
DPF20
The manufacturer declares that the instruments indicated comply with the
directives and rules indicated below.
Instrument protected with double isolation. No earth connection
required.
Electromagnetic compatibility directive 2014/30/EU
Low voltage directive 2014/35/EU
Directive ROHS 2011/65/EU
Instrument conforms to CE rules and regulations.
Security rules EN-61010-1
Instrument
Fixed
Permanently connected
Pollution degree 1 and 2 (without condensation)
Isolation
Double
This instrument has been designed and verified conforming to the 61010-1
CE Security Regulation, for industrial applications.
Installation of this instrument must be performed by qualified personnel
only. This manual contains the appropriate information for the installation.
Using the instrument in ways not specified by the manufacturer may lead to
a reduction of the specified protection level. Disconnect the instrument from
power before starting any maintenance and / or installation action.
Electromagnetic compatibility rules EN-61326-1
EM environment Industrial
Immunity levels
EN-61000-4-2
By contact ±4 KV
By air ±8 KV
Criteria B
Criteria B
The instrument does not have a general switch and will start operation as
soon as power is connected. The instrument does not have protection fuse,
the fuse must be added during installation.
EN-61000-4-3 Criteria A
The instrument is designed to be panel mounted. An appropriate ventilation
of the instrument must be assured. Do not expose the instrument to excess
of humidity. Maintain clean by using a humid rag and do NOT use abrasive
products such as alcohols, solvents, etc.
EN-61000-4-4
On AC power lines : ±2 KV
On DC power lines : ±2 KV
On signal lines : ±1 KV
Criteria B
Criteria B
Criteria B
EN-61000-4-5
Between AC power lines ±1 KV
Between AC power lines and earth ±2 KV
Between DC power lines ±1 KV
Between DC power lines and earth ±2 KV
Between signal lines and earth ±1 KV
Criteria B
Criteria B
Criteria B
Criteria B
Criteria B
General recommendations for electrical installations apply, and for proper
functionality we recommend : if possible, install the instrument far from
electrical noise or magnetic field generators such as power relays, electrical
motors, speed variators, ... If possible, do not install along the same conduits
power cables (power, motor controllers, electrovalves, ...) together with signal and/or control cables.
Before proceeding to the power connection, verify that the voltage level
available matches the power levels indicated in the label on the instrument.
EN-61000-4-6
Criteria A
EN-61000-4-8
Criteria A
30 A/m at 50/60 Hz
EN-61000-4-11 0 % 1 cycle
40 % 10 cycles
70 % 25 cycles
0 % 250 cycles
In case of fire, disconnect the instrument from the power line, fire alarm
according to local rules, disconnect the air conditioning, attack fire with carbonic snow, never with water.
Criteria A
Criteria A
Criteria B
Criteria B
Emission levels
CISPR 11
Instrument Class A, Group 1
Criteria A
According to directive 2012/19/EU, electronic equipment must be recycled in a selective and controlled
way at the end of its useful life.
23
DPF20 Frequency, rate, total or period counter
Instruction Manual
2. Output and control modules
2.1 Módules R1, T1 and SSR
Note : for more than three relays per instrument or larger relay density per module, see special modules R2, R4 and R6.
The menu allows to configure the setpoint, hysteresis, independent
activation and deactivation delays, and a second setpoint to create
alarm windows.
Modules R1, T1 and SSR are isolated against all other instrument circuits, and isolated between them.
Configuration is performed from the frontal keypad of the meter,
by setting the parameters at the alarms configuration menu (‘ALr.1’,
‘ALr.2’ or ‘ALr.3’ depending on the position the module is installed).
Modules R1, T1 and SSR can be ordered pre-installed into a DPF20
digital panel meter, or standalone for delayed installation, as they do
not require soldering or special configuration.
The R1, T1 and SSR modules provides 1 relay output, 1 transistor output or 1 SSR drive output, to install in DPF20 digital panel meters, up
to a maximum of 3 modules in a single meter.
Option
Output type
Relay type
Maximum current
Maximum voltage
Isolation
Type of terminal
R1
relay
3 contact relay (NC, NO, common)
8 A (resistive load)
250 Vac continuous
3500 Veff
plug-in screw terminal
pitch 5.08 mm
‘Opt.1’, ‘Opt.2’, ‘ Opt.3’
Installation allowed at
Option
Output type
Maximum voltage
Maximum current
Isolation
Type of terminal
T1
transistor
35 Vdc
50 mA
3500 Veff
plug-in screw terminal
pitch 5.08 mm
‘Opt.1’, ‘Opt.2’, ‘ Opt.3’
Installation allowed at
Option
Output type
Output voltage
Maximum current
Isolation
Type of terminal
SSR
to control a SSR relay
+15 Vdc
45 mA
1000 Vdc
plug-in screw terminal
pitch 5.08 mm
‘Opt.1’, ‘Opt.2’, ‘ Opt.3’
Opt.1
Opt.2
A B C
A B C
Signal
Output schematics and connections
‘com’ (‘A’)
‘NC’ (‘C’)
Module R1 - Relay output
‘NO’ (‘B’)
Schematic for R1 output
‘B’
‘A’
Module T1 - Transistor output
Schematic for T1 output
+15 Vdc ‘C’
‘B’
Module SSR - SSR drive output
‘A’
Schematic for SSR drive output
Table 7 - Connections
A B C
Opt.3
Installation allowed at
Module
Power
Rear view DPF20
24
SSR relay
DPF20 Frequency, rate, total or period counter
Instruction Manual
2.2 Module AO
provides the excitation for the loop ) or as a passive loop (the loop is
externally powered).
Module AO provides 1 analog output configurable as 4/20 mA or
0/10 Vdc, to install in DPF20 digital panel meters.
Configuration is performed from the frontal keypad of the meter, by
setting the parameters at the options configuration menu (‘Opt.1’,
‘Opt.2’ or ‘Opt.3’ depending on the position the module is installed).
The output signal is proportional to the instrument reading, and it
can be fully scaled with direct (positive) or inverted (negative) slopes.
The mA output can be configured as an active loop (the instrument
Option
Output type
Output signals
Up to a maximum of 3 analog output modules can be installed in a
single instrument, all outputs isolated between them and isolated
from all other circuits.
Modules AO can be ordered pre-installed into a DPF20 digital panel
meter, or standalone for delayed installation, as they do not require
soldering or special configuration.
AO
analog output
4/20 mA active
4/20 mA passive
0/10 Vdc
22 mA, 10.5 Vdc
0 mA, -50 mVdc
related to the instruments reading
direct or inverse slope
+13.8 Vdc ± 0.4 Vdc (max. 25 mA)
protected against short circuit
≤350 Ohms (in 4/20 mA active)
≤800 Ohms (in 4/20 mA passive) (with a
24 Vdc external Vexc) (maximum 27 Vdc
between terminals ‘B’ and ‘C’)
≥10 KOhms (in 0/10 Vdc)
<0.1 % FS
60 ppm/ºC in mA mode
50 ppm/ºC in Vdc mode
<75 mSeconds + meter step response
(0% to 99% signal)
1000 Vdc
15 minutes
plug-in screw terminal
pitch 5.08 mm
‘Opt.1’, ‘Opt.2’, ‘Opt.3’
Max. signal output
Min. signal output
Scaling
Vexc (terminal A)
Load impedances
Accuracy (at 25 ºC)
Thermal stability
Step response
Isolation
Warm-up
Type of terminal
Installation allowed at
Module
Module AO - Analog output
Connections
Terminal A
Terminal B
Terminal C
Jumper M
Jumper V
Vexc
Signal (mA or Vdc)
GND
closed for ‘mA’
closed for ‘Vdc’
Table 8 - Connection terminals
Output 4/20 mA active
MV
The current loop is powered from the ‘AO’ module
A B C
Jumper ‘M’
closed
Signal
Vexc.
Output 4/20 mA passive
MV
A B C
The current loop is powered from an external
equipment
SignalJumper ‘M’
closed
Opt.1
A B C
Output 0/10 Vdc
Opt.2
MV
MV A B C
MV A B C
Opt.3
MV
Signal+
A B C
Com.
Jumper ‘V’
closed
Signal
Power
Table 9 - Connections for each output mode
Rear view DPF20
25
Signal
DPF20 Frequency, rate, total or period counter
Instruction Manual
2.2.1 Configuration menu
Configure at menu ‘Mode’ (‘ModE’) the output signal range to
‘4/20 mA’ (‘mA’) or ‘0/10 Vdc‘ (‘Vdc’). Position for jumpers ‘V’ and
‘M’ must be according to the range selected.
Mode 4/20 mA
Mode
Mode 0/10 Vdc
At menu ‘Scaling’ (‘ScAL’) configure the values that define the two
points (‘high’ and ‘low’) of the ‘signal-reading’ slope:
Scaling
• the lower slope point, defined by ‘Display low’ (‘d.Lo’) and ‘Output low’ (‘Ao.Lo’)
• the higher slope point, defined by ‘Display high’ (‘d.hI’) and ‘Output high’ (‘Ao.hI’)
Output low
Analog output values are shown with ‘XX.XX’ format, acceptable values are ‘0.00’ to ‘10.00’ Vdc for voltage, and ‘0.00’ to ‘20.00’ mA for
current.
Reading
Output high
‘d.hI’=‘100.0’
‘On error’
‘Ao.hI’=‘20.00’
Factory
configuration
4 mA
20 mA
-50.0
Display high
Example - analog output in 4/20 mA,
associated to a reading of -50.0 to 100.0
100.0
Analog
output
Version
‘Ao.Lo’=‘4.00’
‘d.Lo’=‘-50.0’
2.2.2 Error codes
‘Er.34’ output signal configured to value lower than 0 Vdc or 0 mA
‘Er.35’ output signal configured to a value higher than 10 Vdc or 20 mA
‘Er.36’ configured slope points are not acceptable, such as :
‘d.Hi’=’d.Lo’
‘Ao.Hi’=’Ao.Lo’
(‘Ao.Hi’-’Ao.Lo’)>(’d.Hi’-’d.Lo’)
2.2.3 Factory configuration
Mode
Scaling
Display Low
Output Low
Display High
Output High
On error
Display low
‘mA’
0
4.00 [mA]
9999
20.00 [mA]
to high level(‘to_h’)’
26
in case of error, ‘to_h’
to drive output to high
level, ‘to_L’ to drive
output to low level
select ‘yES’ to reload
the default factory
configuration
DPF20 Frequency, rate, total or period counter
Instruction Manual
2.3 Module RTU
Module RTU provides 1 Modbus RTU communications port, to install
in DPF20 digital panel meters. Enables protocol function ‘4’ (‘Read Input Registers’) to access the instrument registers (reading value, alarm
status, memory of maximum and minimum, setpoint values, ...).
Protocol configuration is performed from the frontal keypad of the
meter, by setting the parameters at the options configuration menu
(‘Opt.1’, ‘Opt.2’ or ‘Opt.3’ depending on the position the module is
installed).
Installation allowed at
Module
Connections
Terminal B
Terminal A
Terminal G
B signal from RS-485 bus
A signal from RS-485 bus
GND
Module RTU - Modbus RTU
Table 11 - Connection terminals
Opt.1
Opt.2
B A G
B A G
B A G
Factory configuration
RTU
Modbus RTU communication port
4 (Read_Input_Registers)
01 to 247
see section
see section 2.3.1
RS-485
57.6 Kbps to 600 bps
8n1 (standard), 8o1, 8n2, 8e1
not included
1000 Vdc
3 button front keypad
operation from 0 to 50 ºC
storage from -20 to +70 ºC
‘Address 1’
‘Speed 19.2 Kbps’
‘Format 8n1’
‘Decimal point Auto’
‘Opt.1’, ‘Opt.2’, ‘Opt.3’
Modules RTU can be ordered pre-installed into a DPF20 digital panel
meter, or standalone for delayed installation, as they do not require
soldering or special configuration.
Opt.3
Option
Output type
Function implemented
Addresses
Exception codes
Registers
Bus
speed
Data format
bus terminator
Isolation
Configuration
Temperature
Up to a maximum of 3 RTU modules can be installed in a single instrument, all modules isolated between them and isolated from all
other circuits.
Signal
Power
Rear view DPF20
2.3.1 Accessible registers
Register
Name
Description
Size
Refresh
0
DISPLAY1_L
1
DISPLAY1_H
2
DECIMALS1
3
MAXMEM_L
4
MAXMEM_H
5
MINMEM_L
6
MINMEM_H
7
SETPOINT1_L
8
SETPOINT1_H
9
SETPOINT2_L
10
SETPOINT2_H
11
SETPOINT3_L
12
SETPOINT3_H
13
STATUS
Alarm status
Instrument status
16 bits
Reserved
Reserved
16 x 3 bits
14 a 16
Display value
Decimals on display
Memory of maximum
Memory of minimum
Setpoint 1 value
Setpoint 2 value
Setpoint 3 value
16 bits
same
as display
16 bits
16 bits
16 bits
16 bits
every
30 seconds
16 bits
16 bits
16 bits
16 bits
16 bits
every
2 seconds
16 bits
16 bits
16 bits
same
as display
Table 10 - Registers accessible via MODBUS-RTU.
All registers codified as binary numbers. Negative values are codified in two’s complement.
27
Value : Series M
Value : Series K and S
999999 to -199999
9999 to -1999
0 to 6
0 to 4
999999 to -199999
9999 to -1999
999999 to -199999
9999 to -1999
999999 to -199999
9999 to -1999
999999 to -199999
9999 to -1999
999999 to -199999
9999 to -1999*
bit 0...7 alarm status
bit 8...16 instrument status
Not accessible
Not accessible
DPF20 Frequency, rate, total or period counter
Instruction Manual
2.3.2 Configuration menu
Configure at menu ‘Configuration’ (‘rtu’), the address value between
‘1’ and ‘247’ at parameter ‘Address’ (‘Addr’), bus speed in kbps at
parameter ‘Speed’ (‘bAud’) and data format at parameter ‘Format’
(‘bItS’).
1 to 247
Configuration
Address
Special tools are grouped inside the ‘Tools’ (‘TooL’) menu.
57.6 Kbps
...
...
to 600 bps
Speed
(kbps)
• the ‘Decimal point’ (‘dP’) menu is provided for compatibility with
ancient hardware that does not support decimal point retransmission. By default, select ‘Automatic’ (‘Auto’). If your instrument
does nos transmit the decimal point position, select ‘Manual’
(‘MAnL’) and fix the position of the decimal point manually.
• at the ‘Factory reset’ (‘FAct’) menu, select ‘yes’ to load the default factory configuration for the instrument.
the ‘Version’ (‘VEr’) menu informs of the current firmware version
installed in the module.
2.3.3 Exception codes
8 bits, no parity, 1 stop
Format
The Modbus RTU protocol defines the following scenarios when a
‘Master’ is sending a frame to a ‘Slave’:
• the ‘Slave’ device receives the frame correctly and replies with the
requested data
• the ‘Slave’ devices detects a CRC error, parity error, or other. and
discards the frame without generating a reply frame. The ‘Master’
will detect a ‘TIMEOUT’ condition due to the absence of reply.
• the ‘Slave’ device receives the frame correctly, but replies with an
‘EXCEPTION_CODE’ as it can not process the function or register requested.
The ‘EXCEPTION_CODES’ configured in the RTU module are :
8 bits, even parity, 1 stop
8 bits, odd parity, 1 stop
8 bits, no parity, 2 stop
Tools
Decimal point
Automatic
Manual
Exception
code
Move with LE
Factory
configuration
Name
Description
0
ILLEGAL_FUNCTION
Requested function is
not supported
1
ILLEGAL_DATA_ADDRESS
Requested register is
not supported
Table 12 - Exception codes
Version
28
DPF20 Frequency, rate, total or period counter
Instruction Manual
2.3.4 Description and example for Modbus RTU registers
Register R9 and R10 (SETPOINT2_L and SETPOINT2_H)
Contains the setpoint value of alarm 2, codified in two registers of 16
bits each. Possible values are from 999999 to -199999. Decimal point
position is codified on register R2.
Example - same example as in R0 and R1 but accessing to R9 and
R10.
Register R0 and R1 (DISPLAY1_L and DISPLAY1_H)
Contains the display value of the instrument, codified in two registers
of 16 bits each. Possible values are from 999999 to -199999. Decimal
point position is codified on register R2.
Example R0=FBF1 (hex) and R1=0009 (hex)
Register value = 0009 FBF1 (hex)
Reading value = 654321
Register R11 and R12 (SETPOINT3_L and SETPOINT3_H)
Contains the setpoint value of alarm 3, codified in two registers of 16
bits each. Possible values are from 999999 to -199999. Decimal point
position is codified on register R2.
Example - same example as in R0 and R1 but accessing to R11 and
R12.
Register R2 (DECIMALS1)
Contains the number of decimals of the display, codified in a single
register of 16 bits. Possible values are from 0 to 6.
Example R2=0002 (hex)
Number of decimals = 2 = 6543.21
Register R13 (STATUS)
Information bit-by-bit, for the alarm status (on / off) and instrument
status. See below for a description.
Bit 0
Alarm 1 status (0 = inactive, 1 = active)
Bit 1
Alarm 2 status (0 = inactive, 1 = active)
Bit 2
Alarm 3 status (0 = inactive, 1 = active)
Bit 3 a 7 Reserved
Bit 8
Display overrange
Bit 9
Display underrange
Bit 10
Lost communication with the main processor
Bit 11 to 15 Reserved
Register R3 and R4 (MAXMEM_L and MAXMEM_H)
Contains the memory of maximum reading of the instrument, codified in two registers of 16 bits each. Possible values are from 999999
to -199999. Decimal point position is codified on register R2.
Example - same example as in R0 and R1 but accessing to R3 and
R4.
Register R5 and R6 (MINMEM_L and MINMEM_H)
Contains the memory of minimum reading of the instrument, codified in two registers of 16 bits each. Possible values are from 999999
to -199999. Decimal point position is codified on register R2.
Example - same example as in R0 and R1 but accessing to R5 and
R6.
Registers R14, R15 and R16
Reserved
Register R7 and R8 (SETPOINT1_L and SETPOINT1_H)
Contains the setpoint value of alarm 1, codified in two registers of 16
bits each. Possible values are from 999999 to -199999. Decimal point
position is codified on register R2.
Example - same example as in R0 and R1 but accessing to R7 and
R8.
29
DPF20 Frequency, rate, total or period counter
Instruction Manual
2.4 Module S4
Module S4 provides 1 RS-485 ASCII communications port, to install in
DPF20 digital panel meters. ASCII protocol with ‘master’ - ‘slave’ architecture. Addressable up to 31 modules. Frames codified in representable ASCII characters (codes 32 to 255), directly visible using
‘hyperterminal’ or similar programs.
Instrument registers are accessible through the RS-485 ASCII port
(reading value, alarm status, memory of maximum and minimum,
setpoint values, ...).
Modules S4 can be ordered pre-installed into a DPF20 digital panel
meter, or standalone for delayed installation, as they do not require
soldering or special configuration.
S4
RS-485 ASCII communication port
RS-485
57.6 Kbps to 600 bps
8n1 (standard), 8o1, 8n2, 8e1
ASCII
‘master - slave’
01 to 31
128
see section 2.4.1
1000 Vdc
3 button front keypad
operation from 0 to 50 ºC
storage from -20 to +70 ºC
‘Opt.1’, ‘Opt.2’, ‘Opt.3’
Module
Connections
Terminal B
Terminal A
Terminal G
B signal from RS-485 bus
A signal from RS-485 bus
GND
Module S4 - RS-485 ASCII
Table 13 - Connection terminals
Opt.3
Installation allowed at
Up to a maximum of 3 S4 modules can be installed in a single instrument, all modules isolated between them and isolated from all other
circuits.
Opt.1
Opt.2
B A G
B A G
B A G
Option
Output type
Bus
Speed
Data format
Protocol
Architecture
Addresses
‘Broadcast’ address
Registers
Isolation
Configuration
Temperature
Protocol configuration is performed from the frontal keypad of the
meter, by setting the parameters at the options configuration menu
(‘Opt.1’, ‘Opt.2’ or ‘Opt.3’ depending on the position the module is
installed).
Signal
Power
Rear view DPF20
2.4.1 Accessible registers
Register 1 - MAXMEM
Contains the value for memory of maximum, in ASCII code, including
polarity (positive / negative) and decimal point.
Register 2 - MINMEM
Contains the value for memory of minimum, in ASCII code, including
polarity (positive / negative) and decimal point.
Register 3 - AL1
Contains the value for alarm 1 setpoint, in ASCII code, including polarity (positive / negative) and decimal point.
Register 4 - AL2
Contains the value for alarm 2 setpoint, in ASCII code, including polarity (positive / negative) and decimal point.
Register 5 - AL3
Contains the value for alarm 3 setpoint, in ASCII code, including polarity (positive / negative) and decimal point.
Register 6 - STATUS
Contains the alarm status (on/off).
Bit 0 Alarm 1 status (0 = inactive, 1 = active)
Bit 1 Alarm 2 status (0 = inactive, 1 = active)
Bit 2 Alarm 3 status (0 = inactive, 1 = active)
Bit 3 to 15 Reserved
Display values (DISPLAY1, MAXMEM, MINMEM, AL1, AL2, AL3) are
codified with a minimum of 6 digits (left zeros are added if necessary), polarity and decimal point.
Register
0
1
2
3
4
5
6
Name
Description
DISPLAY1
MAXMEM
MINMEM
AL1
AL2
AL3
STATUS
Display1 value
Memory of maximum
Memory of minimum
Setpoint 1 value
Setpoint 2 value
Setpoint 3 value
Alarm status
Table 14 - Accessible registers for ASCII protocol.
Register 0 - DISPLAY1
Contains the display value of the instrument, in ASCII code, including
polarity (positive / negative) and decimal point.
Example 1 R0=’+’ ‘0’ ’6’ ‘5’ ‘4’ ‘3’ ‘.’ ‘2’
Display value = 6543.2
Example 2 R0=’-’ ‘0’ ‘0’ ‘0’ ‘4’ ‘.’ ‘5’ ‘2’
Display value = -4.52
30
DPF20 Frequency, rate, total or period counter
Instruction Manual
2.4.2 Configuration menu
At menu ‘Configuration ASCII’ (‘AScI’), configure the instrument at
parameter ‘Mode’ (‘ModE’) to work as ‘slave’ or ‘master’, at parameter ‘Address’ (‘Addr’) set the address value from ‘1’ to ‘31’, set the
bus speed in kbps at parameter ‘Speed’ (‘bAud’) and set the data
format at parameter ‘Format’ (‘bItS’).
‘Slave’ mode
Configuration
ASCII
Mode
Address
‘Master’ mode
When working as ‘master’, the instrument continuously transmits
the display value data frame. The local module address is ‘0’. Configure at menu ‘Configuration Master’ (‘cnF.M’) the ‘Destination address’ (‘d.Add’) parameter from ‘1’ to ‘31’ or use value ‘128’ for a
broadcast message. At parameter ‘Frequency’ (‘FrEq’) select the how
often the frame with the reading value will be transmitted.
1 to 31
Speed
(kbps)
Special tools are grouped inside the ‘Tools’ (‘TooL’) menu.
• the ‘Decimal point’ (‘dP’) menu is provided for compatibility with
ancient hardware that does not support decimal point retransmission. By default, select ‘Automatic’ (‘Auto’). If your instrument
does nos transmit the decimal point position, select ‘Manual’
(‘MAnL’) and fix the position of the decimal point manually.
•the ‘Legacy mode’ (‘LEG’) parameter is provided to maintain
compatibility with instruments with older communication protocols. Select ‘on’ to activate this mode.
• the ‘Answer delay’ (‘AnS.d’) parameter applies only to ‘Slave’
mode. The local module delays the answer frame. Configure for
applications where the ‘Master’ needs additional time to switch
between ‘transmit’ and ‘receive’ modes. Enter a numeric value between ‘0’ and ‘1000’ mSeconds.
• at the ‘Factory reset’ (‘FAct’) menu, select ‘yes’ to load the default factory configuration for the instrument.
the ‘Version’ (‘VEr’) menu informs of the current firmware version
installed in the module.
8 bits, no parity, 1 stop
Format
8 bits, even parity, 1 stop
8 bits, odd parity, 1 stop
8 bits, no parity, 2 stop
Configuration
‘Master’
Destination
address
2.4.3 Factory configuration
1 to 31
128 for ‘broadcast’
0.1 seconds
0.5 seconds
1 seconds
5 seconds
15 seconds
60 seconds
Frequency
Tools
Decimal point
Configuration ASCII
Mode
Address
Speed (‘bAud’)
Format (‘bItS’)
Configuration ‘Master’
Destination address
Frequency
Tools
Decimal point
Legacy
Answer delay
Automatic
Manual
use key ‘LE’ to select
Legacy mode
Answer delay
delay for answers,
from 0 to 1000 mSec.
Factory
configuration
Version
31
Slave
1
19.2 Kbps
8n1
31
0.5 seconds
Auto
Off
0 mSeconds
DPF20 Frequency, rate, total or period counter
Instruction Manual
2.4.4 Frame types
• Frame ‘error’ (‘ERR’). Id code 38. Response frame to a request data
frame. Indicates that an error has occurred. Error code is codified
into the ‘REG’ byte (‘Header’ section).
• Frame ‘ping’ (‘PING’). Id code 32. Used to confirm the existence of
the remote instrument.
• Frame ‘pong’ (‘PONG’). Id code 33. Response to a ‘ping’ frame. It
confirms the existence of the remote instrument.
The ASCII protocol defines the following frames:
• Frame ‘read’ (‘RD’). Id code 36. Request data frame. The requested
register is indicated into the ‘REG’ byte (‘Header’ section).
• Frame ‘answer’ (‘ANS’). Id code 37. Response frame to a request
data frame. The requested register is indicated into the ‘REG’ byte’
(‘Header’ section). Data of the requested register is indicated into
data bytes ‘D0’ to ‘Dn’ (‘Data’ section).
2.4.5 Frame structure
Header
Data
STX
ID
RSV
FROM
TO
REG
RSV
LONG
2
x
32
x
x
x
32
n+1
0
1
2
3
4
5
6
7
D0
D1
8
9
Trail
...
Dn
CRC
x
3
...
n+7
n+8
n+9
[data]
ETX
Section ‘Trail’
Contains the ‘CRC’ code and the end of frame byte (‘ETX’).
Protocol frames have a structure made of ‘Header’, ‘Data’ and ‘Trail’.
Section ‘Header’
Contains the start byte (‘STX’), the frame identifier (‘ID’), the origin
address (‘FROM’) and the destination address (‘TO’), the register id
(‘REG’) and the length (‘LONG’) of the ‘Data’ section.
‘Real value’ and ‘Frame value’
To use representable ASCII values, the real values are codified before
being sent into the frame. The following definitions apply :
• ‘real value’ is the value of the field without codification
• ‘frame value’ is the value of the field, codified
Section ‘Data’
Contains data for the requested register (‘REG’).
Field
Description
Size
Position
Real value
Frame value
STX
Start of frame
1 byte
0
does not apply
2
ID
Frame type
1 byte
1
(see section 2.4.4)
real_value
RSV
Reserved
1 byte
2
0
32
FROM
Origin address
1 byte
3
0 (‘Master’) / 1 to 31 (‘Slave’)
32 + real_value
TO
Destination address
1 byte
4
0 (‘Master’) / 1 to 31 (‘Slave’)
128 (‘broadcast’)
32 + real_value
REG
Register identification
1 byte
5
(see section 2.4.1)
32 + real_value
RSV
Reserved
1 byte
6
0
32
LONG
Length of ‘Data’ section
1 byte
7
n (between 0 and 32)
32 + real_value
D0 … Dn
Data
n bytes
8 to n+7
number 0 to 9
decimal point
polarity (+/-)
ASCII code of the number (48 to 57)
ASCII code of decimal point (46)
ASCII code of ‘+’ (43)
ASCII code of ‘-’ (45)
CRC
CRC calculation
1 byte
n+8
does not apply
(see section 2.4.8)
ETX
End of frame
1 byte
n+9
does not apply
3
Table 15 - Description of the bytes for the ASCII frame
2.4.6 Error codes
Frames ‘ERR’ contain within the ‘REG’ field, the error code. Available
error codes are :
error 1
unknown register
error 2
display overrange
error 3
display underrange
error 4
error 5
32
CRC error
internal error
DPF20 Frequency, rate, total or period counter
Instruction Manual
2.4.7 Frame examples
Frames ‘RD’ (36) and ‘ANS’ (37)
*Instruments with 4 digits also send reading values formatted with 6
digits : value -321.5 is transmitted as -00321.5
Example - ‘Master’ (address ‘0’) requests the value of register ‘0’ (display value) to the ‘Slave’ at address ‘28’ (‘RD’ frame) and the ‘Slave’
replies to the ‘Master’ with a reply frame (‘ANS’ frame) containing
the requested data (765.43).
Header
Trail
STX
ID
RSV
FROM
TO
REG
RSV
LONG
CRC
ETX
2
36
32
32
60
32
32
32
58
3
Start
RD
---
0
28
0
---
0
CRC
Stop
Header
Data
Trail
STX
ID
RSV
FROM
TO
REG
RSV
LONG
D0
D1
D2
D3
D4
D5
D6
D7
CRC
ETX
2
37
32
60
32
32
32
40
43
48
55
54
53
46
52
51
15
3
Start
ANS
---
28
0
0
---
8
+0765.43
CRC
Stop
Frames ‘ERR’ (38)
Example - ‘Slave’ at address ‘11’ replies to the ‘Master’ (address ‘0’)
with an error frame (‘ERR’ frame) indicating that the requested register number is unknown (‘UNKNOWN_REGISTER’, error code ‘1’). The
error code is codified into the ‘REG’ byte. For a list of error code see
section 2.4.6.
Header
Trail
STX
ID
RSV
FROM
TO
REG
RSV
LONG
CRC
ETX
2
38
32
43
32
33
32
32
46
3
Start
ERR
---
11
0
1
---
0
CRC
Stop
2.4.8 CRC calculation
Frames ‘PING’ (32) and ‘PONG’ (33)
Example - ‘Master’ (address ‘0’) requests confirmation of existence to
the ‘Slave’ at addrress ‘22’ (‘PING’ frame) and the ‘Slave’ replies to
the ‘Master’ with a ‘PONG’ frame.
Header
Trail
STX
ID
RSV
FROM TO
REG
RSV
LONG CRC
ETX
2
32
32
32
54
32
32
32
52
3
---
0
22
0
---
0
CRC
Stop
Start Ping
The ‘frame value’ for the CRC byte is calculated applying a XOR function to the ‘frame value’ (see section 2.4.5) of all bytes in sections
‘Header’ and ‘Data’, from byte ‘0’ (‘STX’) to the last data byte (‘Dn’).
• if the calculated CRC value is lower than ‘32’, it is normalized by applying the ‘one’s complement’ function .
CRC0=STX ^ ID ^ RSV ^ FROM ^ TO ^ REG ^ RSV ^ LONG ^ D0 ^...^ Dn
• if (CRC0<32) -> CRC=!CRC0 (one’s complement function)
• if (CRC0>31) -> CRC=CRC0
Header
//example of CRC calculation in C language
Trail
int8 Calculate_CRC(int8 CRC_Position)
STX
ID
RSV
FROM TO
REG
RSV
LONG CRC
ETX
2
33
32
54
32
32
32
32
53
3
int8 i,CRC=0;
Start Pong ---
22
0
0
---
0
CRC
Stop
for(i=0;c<CRC_Position;c++)
{
{
crc=crc ^ frame[i];
}
if(crc<32) CRC=~CRC;
return(CRC);
}
33
DPF20 Frequency, rate, total or period counter
Instruction Manual
2.5 Module S2
2.6 Modules R2, R4 and R6
Module S2 provides 1 RS-232 ASCII communications port, to install in
DPF20 digital panel meters. Protocol specifications are the same as with
module S4 (see section 2.4), with only difference that the physical bus is
RS-232 instead of RS-485.
S2 modules allow for point-to-point communication over RS-232 and also
allow for multinode communication over RS-232 using a ‘Daisy-Chain’ type
of connection.
Terminals RX1 and TX1 are for connection to the RS-232 bus. Terminals
RX2 and TX2 are for RS-232 multinode connection. Frames received on
RX1 with destination address different than the local instrument’s address, will be retransmitted over the TX2 terminal. In a similar way, frames
received from RX2 with destination address other than the local address,
will be retransmitted over TX1 terminal.
Up to a maximum of 3 S4 modules can be installed in a single instrument,
all modules isolated between them and isolated from all other circuits.
Modules S2 can be ordered pre-installed into a DPF20 digital panel meter,
or standalone for delayed installation, as they do not require soldering or
special configuration.
Modules R2, R4 and R6 provide 2, 4 and 6 relay outputs, to install in
DPF20 digital panel meters.
Configuration is performed from the frontal keypad of the meter, by
setting the parameters at the ‘Opt.1’ configuration menu (not from
the alarm configuration menu (‘ALr.1’, ‘ALr.2’ o ‘ALr.3’) of the instrument).
The menu allows to configure the setpoint, hysteresis, independent
activation and deactivation delays, and a second setpoint to create
alarm windows.
Only 1 modules R2, R4 or R6 can be installed in a single instrument,
as the are not compatible with themselves (2 modules R2 are not accepted) and are not compatible with modules R1, T1 or SSR.
Modules R2, R4 and R6 are isolated against all other instrument circuits.
Modules R2, R4 and R6 can be ordered pre-installed into a DPF20
digital panel meter, or standalone for delayed installation, as they do
not require soldering or special configuration.
Option
Output type
Bus
Speed
Data format
Protocol
Architecture
Addresses
‘Broadcast’ address
Registers
Isolation
Configuration
Temperature
Option
R2, R4, R6
Output type
relay (2, 4 and 6 relays)
Relay type
3 contacts (NC, NO, common)
Maximum current
6 A per relay (resistive load)
Maximum voltage*
250 Vac continuous
* terminals approved for 300 V (as per UL1059, groups B and D) and
160 V (as per VDE at CAT-III and pollution degree 3).
Isolation
2500 Veff
Type of terminal
plug-in screw terminal
pitch 5.08 mm
Installation allowed at
‘Opt.1’
Module R2
occupies Opt.1 (2 relays)
Module R4
occupies Opt.1 and Opt.2 (4 relays)
Module R6
occupies Opt.1, Opt.2 and Opt.3 (6 relays)
S2
RS-232 ASCII communication port
RS-232
57.6 Kbps to 600 bps
8n1 (standard), 8o1, 8n2, 8e1
ASCII
‘master - slave’
01 to 31
128
see section 2.4.1
1000 Vdc
3 button front keypad
operation from 0 to 50 ºC
storage from -20 to +70 ºC
‘Opt.1’, ‘Opt.2’, ‘Opt.3’
Module
Connections
Module S2 - RS-232 ASCII
Terminal A
Terminal B
Terminal C
Terminal D
Terminal E
Tx2
Rx2
Tx1
Rx1
GND
A
D
G
J
M
P
Normally Open (NO) Normally Closed (NC)
B
E
H
K
N
Q
Opt.1
A B C D E
A B C D E F
Opt.3
Signal
relay 1
relay 2
relay 3
relay 4
relay 5
relay 6
Opt.2
A B C D E
Opt.3
A B C D E
Common
C
F
I
L
O
R
Table 17 - Connection terminals
Table 16 - Connection terminals
Opt.1
Relay
Signal
Power
Rear view DPF20
Rear view DPF20
34
Opt.2
G H I J K L
MNOPQR
Installation allowed at
Power
DPF20 Frequency, rate, total or period counter
Instruction Manual
2.6.1 Configuration menu
Alarm 1
To configure alarm 1, access the ‘Alarm 1’ (‘ALr1’) menu and configure the following parameters : To configure alarms 2, 3, etc, access
the corresponding menu entries.
Active
• select ‘Active’ (‘Act’) to ‘on’
Type of alarm
• at ‘Alarm type’ (‘TypE’) select the maximum alarm (‘MAX’) or
minimum alarm (‘MIn’). The maximum alarm (or type alarm) activates when display value is higher (or lower) than the setpoint
value.
Setpoint
• at ‘Setpoint’ (‘SEt’) enter the alarm activation value.
Hysteresis
• configure the hysteresis value at ‘Hysteresis’ (‘hySt’). The hysteresis applies to the deactivation process of the alarm. The alarm deactivates when the reading has passed the setpoint value plus the
hysteresis value.
Delay 0
• at ‘Delay 0’ (‘dEL.0’) assign the delay to be applied before alarm
activation. The activation delay starts counting when the setpoint
value is passed. Configurable from 0.0 to 99.9 seconds.
Delay 1
• at ‘Delay 1’ (‘dEL.1’) assign the delay to be applied before alarm
deactivation. The deactivation delay starts counting when the setpoint value plus the hysteresis value, is passed. Configurable from
0.0 to 99.9 seconds.
Setpoint 2
Menu for Alarm 2, at modules R2, R4 and R6
• to activate the second setpoint, activate ‘Setpoint 2’ (‘SEt2’) to
‘on’ and then configure the desired setpoint value. Second setpoint
allows for windowed alarms. The first setpoint activates the alarm,
and the second setpoint deactivates the alarm (configuration for
‘Alarm as maximum’ type of alarm). Second setpoint must always
be higher in value than the first setpoint.
Menu for Alarm 3, at modules R4 and R6
Menu for Alarm 4, at modules R4 and R6
Menu for Alarm 5, at modules R6
Menu for Alarm 6, at modules R6
Factory
configuration
Version
2.6.2 Factory configuration
Factory configuration for alarms 1, 2, 3, 4, 5 and 6
‘Active
on’
‘Type
de maxima’
‘Setpoint 1
1000’
‘Setpoint 2
2000’
‘Setpoint 3
3000’
‘Setpoint 4
4000’
‘Setpoint 5
5000’
‘Setpoint 6
6000’
‘Hysteresis
0 counts’
‘Activation delay
0.0 counts’
‘Deactivation delay
0.0 seconds’
‘Setpoint 2
Off’
35
DPF20 Frequency, rate, total or period counter
Instruction Manual
3. How to open and close
3.1 How to open the housing
A. Locate the clips
Locate the 4 clips (A B C D). Clips are covered by the front filter.
Clips can be seen when looking from the rear of the instrument, just below the front filter.
A.1
B
A.3
A.2
D
C
A
D
B
C
A
B
A
B. How to unclip one clip
Place a flat screw driver at the first clip. Insert firmly until the end of the clip space, and then turn gently the screwdriver clockwise approx.
45º (while still pushing against the clip). The front filter will ‘move up’ and unclip itself. Clip is unclipped when the front filter corner moves
slightly to the front.
B.1
B.2
B.3 Screw driver placed
B
B
B
Clipped
A
A
C. Repeat with all clips
Repeat for remaining 3 clips. All 4 clips are now unclipped.
Front filter is slightly moved to the front on each corner. It can now be removed by hand.
C.1
C.3
C.2
D
B
C
A
Screw driver turned
B
Unclipped
Unclipped
36
Unclipped
DPF20 Frequency, rate, total or period counter
Instruction Manual
3.2 How to close the housing
A. Locate the clips
Locate the 4 clips (A B C D) at the housing (image A.1) and the 4 matting clips at the filter (image A.2). With the instrument inside the housing,
face the front filter against the housing (do not clip yet). Do not press the rear terminals with your hand, as the instrument would force the
filter outwards.
A.1
B
A.2
D
A.3
D
B
Front filter
Internal View
C
C
A
A
B. Fit corner ‘X’ and clip ‘A’
Fully insert corner ‘X’ into the housing. See at image B.2 that the filter is not yet clipped : only corner ‘X’ is completely fitted. Corner ‘Y’ can
be also fitted or not fitted (it is not important). With corner X fitted and firmly pressed (it must remain fitted), press clip ‘A’ and it will clip (you
will hear a clear ‘snap’).
B.1
B.2
B.3
Corner ‘Y’ can be
fitted or not fitted
Corner ‘X’ fitted
Press ‘A’
‘X’
Corner ‘X’ fitted
C. Clip remaining clips ‘B’, ‘C’ & ‘D’
Still press firmly corner ‘X’ until all four clips are clipped. You can release your finger from clip ‘A’ as clip ‘A’ will not unclip once it is clipped.
Press on clip ‘B’ until it clips (you will hear a clear ‘snap’). Then press on clips ‘C’ and ‘D’ (you will hear a clear ‘snap’ on each case).
C.1
C.2
C.3
2n
Press ‘D’
1st
Press ‘C’
Press ‘B’
Corner ‘X’ fitted
Corner ‘X’ fitted
37
DPF20 Frequency, rate, total or period counter
Instruction Manual
38
DPF20 Frequency, rate, total or period counter
Instruction Manual
39
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Controllers, Calibrators, Simulators & Pumps
Industrial pH & Conductivity Equipment
DATA ACQUISITION
Communications-Based Acquisition Systems
Data Logging Systems
Wireless Sensors, Transmitters, & Receivers
Signal Conditioners
Data Acquisition Software
HEATERS
Heating Cable
Cartridge & Strip Heaters
Immersion & Band Heaters
Flexible Heaters
Laboratory Heaters
ENVIRONMENTAL
MONITORING AND CONTROL
Metering & Control Instrumentation
Refractometers
Pumps & Tubing
Air, Soil & Water Monitors
Industrial Water & Wastewater Treatment
pH, Conductivity & Dissolved Oxygen Instruments
M5675/0818
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