KHAE GW6 Series User manual

GW621/GW626/GW631/GW636
Multifunctional pulse meter instruction manual
Pulse counting, rotating pulse measurement and time interval
measurement with high speed plus and minus count
1 Characteristics
•18 measuring functions to support all kinds of pulse measurement applications
•It can be equipped with voltage-free contacts, photoelectric switches, proximity switches, rotary
encoders and other sensors
•igh accuracy measurement range 0.0001 z – 100k z
•Memory function of counting value, maximum value and minimum value, memory/no memory
can be set
•Measure value display update cycle, monitor brightness can be set
•Two sets of alarm output, alarm type, action error, start delay and close delay can be set
•Output function of photoelectric isolation transformer, current output (4-20mA) / voltage output
(0-10VDC)
•Photoelectric isolation communication interface RS-485 / RS-232C, with a baud rate range of
2400 ~ 38400bps
2 Model Indication
Dimensions and
Display
Power Sensor Power Alarm Output
1
Alarm Output
2
Relay Output
621 160x80x80mm
4 LED, 20.3mm 1 100 - 240VAC 05 5VDC 0 None 0 None 0 None
631 160x80x80mm
6 LED, 20.3mm 2 24V AC/DC 12 12VDC 1 Relay 1 Relay 1 RS-485
626 96x48x82mm
4 LED, 20.3mm 24 24VDC 2 NPN 2 NPN 2 RS-232C
636 96x48x82mm
6 LED, 14.2mm 3 4-20mA
4 0-10VDC

3 Dimensions and opening dimensions of panel
4 Function description of each part of operation panel
o. Description o. Description
1 Display 6 olding Light
2 Alarm 1 Indicator 7 Menu
3 Alarm 2 Indicator 8 Switch Max/Min
4 Max Indicator 9 Shift Key / RST
5 Min Indicator 10 Increase Key / OLD
5 Wiring

Signal Input Connections
The input terminals of IN-1, IN-2, RST and OLD are internally connected with pull-up resistance, so
when the terminals are not wired (suspended), the input on IN is a high level state. When the RST and
OLD terminals are not used and are suspended, the input logic of RST and OLD should be
reversed, that is, the parameter value of R -N is ON (see "7. Parameter specification").
* This instrument is equipped with a sensor of NPN type.
If the meter USES PNP sensor, please contact us for the customization
6 Panel display and button operation
In normal mode, the display window displays the measured value (current value), the maximum value
and the minimum value. When the value exceeds the display range, it displays ( ); when it
exceeds the display range, it displays LLLL (LL).
In setup mode, the display window is used to display parameter symbols, parameter values, etc.

5 indicators AL1 / AL2 / MAX / MIN / OLD, indicating the working status and display status of the
instrument.
The panel buttons are used to set the parameters They have a second function, in regular
mode.
The key is used as the MAX / MIN (maximum / minimum) key to switch between the current
values, the maximum value and the minimum value. When it is displayed as the maximum or minimum
value, the corresponding indicator light will be on. If you press the MAX / MIN key for more than 3
seconds, you will reset the maximum and minimum values (equal to the current value).
The key is used as the RST (reset) key. When the key is pressed, the measured value and the output
of the instrument are reset and the measurement stops.
The key is used as the OLD key. When pressed, the input of IN-1 and IN-2 is prohibited, the
measurement value and instrument output remain unchanged, and the OLD ( OLD) indicator light is
on. Press the button again, exit the holding state and start measuring.
The second function allows or disallows use, which can be set separately in "engineer
menu - display key parameter group". The instrument parameters are distributed in the operation menu,
engineer menu and configuration menu, and can be set according to the need of measurement and
control process.
If the parameter values of PAS1, PAS2 and PAS3 are not 0, the password will be prompted before
entering the corresponding menu. The operation method is the same as the parameter setting.

•Action menu: used to set parameters
that needs to be changed frequently. It
consists of 0 ~ 8 parameters selected
randomly in the engineer menu.
Push enter the action menu. Push
to select parameter. Press down in
the parameter selection state.
Exit to menu.
•Engineer menu: used to set the
measurement, control, display and other
parameters of the meter.
Push for 3 seconds to enter the
engineer menu. Push or to
choose parameters and then push to
select it. Push to go back.
•Configuration menu: used to set
parameters such as instrument function,
input signal range, etc., which are
usually not allowed to be modified after
instrument installation and debugging.
Push and at the same time for
3 seconds to enter configuration menu.
Push to select the parameters. Press
down in the parameter selection state.
Exit to menu.
•Parameter setting: after entering each
menu push to choose parameter.
Push to display the code value. It
will flash if it is available to be
changed. Use and to increase
or decrees the value. Press to save
new parameter value in the internal memory storage. Push again to finish the setting.
The meter will automatically return to normal mode if there is no button operation within 1 minute in
the setting mode. If the meter returns to normal mode during parameter setting, the parameter values
being modified are not stored.
US - 1 ~ US - 8 display most
be selected by the user.
Common parameters in the
configuration Menu UF - 1 ~
UF - 8 are in the Settings.

In the state of parameter selection, press to return to the parameter group selection.
In the parameter group selection state, press to exit menu and return to the regular pattern.
7 Parameters description
Code ame Range Factory Default Description
FUNC Function F01 ~ F18 F01
FRQL Input signal range I, MD, LO LO
IN-N IN-1, IN-2 inputs;
Logic reverse ON, OFF ON
R -N RST, old inputs;
Logic reverse ON, OFF ON
UF-1
UF-8 User functions 1 ~ 8
NONE
All parameters are in the
engineers menu
UF-1: AL-1
UF-2: Al-2
UF-3
~
UF-8: NONE
PAS1 Menu password 0 ~ 9999 0
PAS2 Engineer menu password 0 ~ 9999 0
PAS3 Configuration menu password 0 ~ 9999 0
VER Version - -
INIT Factory reset ON, OFF OFF

1. FRQL Input frequency range 2. IN-N, R -N Input signal logic reversal
Parameter
value Range Pulse with on/off Input signal
I 0 ~ 100k z
(50k z) Min. 4.8µs Inside
signal
IN-N=OFF
(R -N=OFF)
MD 0 ~ 3k z Min. 160µs IN-N=ON
(R -N=ON)
LO 0 ~ 30k z Min. 16ms
When no voltage contact input, FRQL must be set to LO
3. If the menu password PAS1 / PAS2 / PAS3 parameter value is not 0, PWD1 / PWD2 / PWD3 prompt
will appear in the display window when entering the operation menu/engineer menu/configuration
menu, and only enter the correct password to enter the menu.
Remember to set the menu password! Forget password meter parameters will not be modified! If you
forgot password please contact the manufacturer or distributor to restore the instrument factory value.
Code Name Rang Factory Default Description
G. DK Display, key parameter group
LOCK DATA LOCK ON, OFF OFF ON: DATA CAN’T C ANGE
OFF: DATA CAN C ANGE
DISP DISPLAY SELECTION PV, MAX, MIN PV Current value, maximum and
minimum value are displayed
DREF Display update cycle
OFF
0.10
0.25
0.50
1
2
4
OFF
OFF ≤ 50ms
0.10 100ms
0.25 250ms
0.50 500ms (1)
1 1s
2 2s
4 4s
DLGT Brightness 1 ~ 5 3 1 Lowest, 5 ighest
KMM MAX / MIN keyboard ON, OFF ON ON: Alow OFF: Ban
KRST RST ON, OFF ON ON: Alow OFF: Ban
K LD OLD ON, OFF ON ON: Alow OFF: Ban

Code Name Rang Factory
Default
Description
G. AL Alarm parameter set
AL - 1 Alarm 1 -1999 ~ 9999 (GW621 / GW626)
-199999 ~ 999999 (GW631 / GW636) 1000
(2)
ALT1 Alarm 1 type I, LO I
ALY1 Alarm 1 action error 0 ~ 9999 10
ALN1 Alarm 1 start delay time 0.0 ~ 599.9s 0.0s
ALF1 Alarm 1 close delay time 0.0 ~ 599.9s 0.0s
AL - 2 Alarm 2 -1999 ~ 9999 (GW621 / GW626)
-199999 ~ 999999 (GW631 GW636) 2000
ALT2 Alarm 2 type I, LO I
ALY2 Alarm 2 action error 0 ~ 9999 10
ALN2 Alarm 2 start delay time 0.0 ~ 599.9s 0.0s
ALF2 Alarm 2 close delay time 0.0 ~ 599.9s 0.0s
G. PV Measurement parameters
PVDU Time unit selection OFF, MMSS (GW621 / GW626)
OFF, MMSS (GW631 / GW636) OFF
OFF: display is in seconds
MMSS: minutes and seconds
MMSS: hours, minutes and
seconds (3)
A, D Ratio (multiplication) -1999 ~ 9999 (GW621 / GW626)
-199999 ~ 999999 (GW631 / GW636) 1The input value can be converted
and displayed as the required
unit value by setting the ratio (4)
B, E Ratio factor 1 ~ 9999 (GW621 / GW626)
1 ~ 999999 (GW631 / GW636) 1
C Initial counter value -1999 ~ 9999 (GW621 / GW626)
-199999 ~ 999999 (GW631 / GW636) 0Make the measurement start with the desired value
DP Point position 0 ~ 3 (GW621 / GW626)
0 ~ 5 (GW631 / GW636) 0
The position of the decimal point
of the measured value and its
associated parameters (5)
G. PV Measurement parameters
FILT Digital filter coefficient 0 ~ 9 0 As function size of digital filter
is larger more powerful it is (6)
ATZ1 IN-1 Automatic reset time 0 ~ 9999s 2s When there is no pulse input
during this time the value is
forced to be 0.
ATZ2 IN-2 Automatic reset time 0 ~ 9999s 2s
MDLY Measure delay time with
power on 0.1 ~ 99.9s 0.1s Set the appropriate time to wait for the input signal
MEMO Power out storage ON, OFF OFF
ON: remember the
measurements taken before the
power outage
OFF: power off no record
G. TST Test parameter set
TEST Output test -1999 ~ 9999 (GW621 / GW626)
-199999 ~ 999999 (GW631 / GW636) 0The key operation simulation of measurement value check

Code Name Rang Factory
Default
Description
G. COM Communication parameter set
COMM Communication methods OFF, RO, R-W R-W
(8)
ADDR Local address 1 ~ 255 1
BAUD Baud rate 2.4k, 4.8k, 9.6k, 19.2k, 38.4k 9.6kbps
G. RET Variable feed output parameter set
RTYP Variable output type
A output: 4 – 20mA DC
0 – 20mA DC
0 – 10mA DC
4 – 20mA DC
The output current signal is
proportional to the change
in the measured value
V output: 0 – 10V DC
0 – 5V DC
1 – 5V DC
0 – 10V DC
The output current signal is
proportional to the change
in the measured value
RET Transmission upper limit -1999 ~ 9999 (GW621 / GW626)
-199999 ~ 999999 (GW631 / GW636) 1000
Measured value is
corresponding to the output
of 20mADC
RETL Transmission lower limit -1999 ~ 9999 (GW621 / GW626)
-199999 ~ 999999 (GW631 / GW636) 0
Measured value is
corresponding to the output
of 4mADC
(1) Display update cycle: when the measured value changes rapidly, increasing the display update
cycle can improve the readability of the display.
(2) ALT1, ALT2 Alarm type: I upper limit alarm, LO lower limit alarm.
ALY1 and ALY2 alarm action error: when the measured value is near the alarm value, repeated
actions often occur in the alarm output due to input fluctuations and other reasons. Setting
appropriate alarm action error can prevent repeated actions of the alarm output.
Start delay time for ALN1 and ALN2 alarm, and close delay time for ALF1 and ALF2 alarm:
when the measured value reaches the alarm action value, move after the delay time. If the
measured value changes during the delay and the action condition is no longer met, there is no
alarm action.

(3) PVDU time unit selection: in time interval measurement function F10 / F11 / F12, select time
unit. When PVDU is set to OFF, the ratio factor A and B are set to 1, and the display units are
seconds. The ratio factor A and B can be displayed as other units.
(4) The ratios of A, D ratio factor (multiplication), B and E ratio (except): A B B and D E E are
used as ratios. For example, set A = 215, B = 1000, that is, the ratio is 0.215
(5) When setting the decimal point position parameter, push the decimal point shift right, push
the decimal point moves to the left.
(6) When there is a sharp change in the measured value and the measured value shows digital jump
repeatedly or caused by interference, the digital filter coefficient should be increased to make
the display stable. The larger the digital filter is, the more stable the measured value is, but the
slower the response is.
(7) The output test function can use keys to change the test value, and can confirm the output action
without the actual input signal. Push to reduce test values, push to increase the value.
(8) The instrument can be equipped with RS-485 or RS-232C communication interface with
photoelectric isolation, using Modbus RTU communication protocol, and the baud rate is 2400-
38400 bps. When using the RS - 485 interface, each host can directly connect 63 meters at
most.
The host can read the working state of the meter and send commands such as RST and OLD.
The host can read parameter values and read 1 or more parameter values at a time.
The host can write parameter values and write 1 or more parameter values at a time.
Each parameter has EEPROM address and RAM address at the same time. Due to the limited
number of write times of EEPROM (about 100,000 times), it is recommended that the
parameters with excessive replacement frequency be written into RAM without the limit of
write times, but when power on again, the instrument uses the data in EEPROM.
When the communication mode parameter COMM is set to OFF, the communication function
of the instrument is closed; when RO is set, only the parameters and working status of the
instrument can be read, and the parameters can not be modified; when R-W is set, both the
parameters and working status of the instrument can be read and the parameters can be
modified.
"GW621/GW626/GW631/GW636 Multifunctional Pulse Meter Communication Instructions"
contains detailed communication instructions.
Download address: http://www.khae.cn/support/manual/pgw620.pdf

8 Functional description
The instrument has 18 measuring functions, F01 to F18, and is set in the parameter FUNC. The
graphical and literal descriptions of pulse signals in the following paragraphs, if not specified, refer to
the case of input uncorrelated closure (IN-N = OFF, R -N = OFF).
F01, F02, F03, F04
F01 - Independent input and subtraction counter
Count in IN - 1 pulse input and reduce count when IN -2
pulse input. The count increases on the rising edge of IN - 1
input and decreases on the rising edge of IN -2 input. When
IN - 1 inputs and IN -2 inputs are connected at the same
time, the count remains unchanged.
F02 - Instruction input plus and minus counter
IN - 1 input control plus and minus direction, IN -2 input to
count. When IN-1 input is high level, count is added on the
rising edge of IN-2 pulse input; when IN-1 input is low
level, count is subtracted on the rising edge of IN-2 pulse
input.
F03 - Phase difference input and addition counter
When the input pulse phase of IN-1 is ahead of that of IN-2,
the count increases along the descending edge of IN-2 input,
and decreases on the ascending edge of IN-2 input when the
input pulse phase of IN-1 lags behind that of IN-2 input.
F04 - Double input unidirectional counter
Add count on the IN - 1 pulse input and the rising edge of
IN -2 pulse input. When the counter is needed, the ratio
factor A is set to a negative value.
Keep measurement value: OLD stops counting and keeps the measured value when input, and the
output is also maintained.
Reset measurement value: RST zero count when input, and all outputs are disconnected.
Power off memory: the parameter MEMO is set to ON, and the memory count value is cut off. After
the power is on again, count from the count before power failure. When the parameter MEMO is set to
OFF, there is no power off memory.

The counter functions F01, F02, F03 and F04 are measured by using the following formulas:
measurement value = count *A_B+C
A, B: ratio factor. Set the ratio factor to convert the count value into the unit of measurement.
C: the initial value of the counter, so that the measurement starts with the desired value.
For example, the encoder with output pulse 1000p/r is used in the measurement of sheet metal length in
the following figure. The circumference of the roll is 200 mm. Setting parameters: When A = 2000, B =
1000, C = 0, DP = 1, the display value unit of the instrument is mm, and 1 digit is reserved after
decimal point.
Sheet Length Yield Count
Fabric and Paper Length

F05, F06, F07, F08
F05 – Tachometer
The pulse signal is input by IN - 2, the number of pulses per
minute is measured, and the speed is displayed in rpm.
Setting the ratio factor A and B enables the measured values
to be displayed in the required units.
Measurement = pulse count per minute * A B
Example: motor speed test
F06 - Frequency table
The input pulse frequency of IN-2 is measured in Z.
Setting ratio factors A and B, the measured value can be
displayed in the required units.
Measured value = frequency * A * B
Example: measuring circumferential speed or linear velocity
(unit: M / s)
A = circumference length (unit: m) B = number of pulses per
turn
F07 – Cycle
Measuring the input pulse period of IN - 2, setting the ratio
factor A and B can make the measured value display in
required units.
The measured value = cycle A * B (periodic unit: ms
F08 - Duty Cycle
Measure the ratio of the input pulse width to the period of
IN-2. Set the ratio factors A and B to display the measured
value in the required units.
Measurement = duty cycle * A * B
(duty cycle:%)
F09, F10, F11, F12, F13, F14
F09 - Through Speed
Multiply the reciprocal of time t(s) from IN-1 to IN-2 by 60,
and show the object's passing speed between two points.
Measured value = 1t × 60 × A ÷ B
F10 - Transmission Cycle
Displays the time from IN to 2 to the next conduction time
t(s).
Measure = t * A * B(A, B: ratio factor)

F11 - Time Difference
Show the time between IN - 1 and IN - 2 conduction (T)(s)
Measured value = t × A ÷ B
F12 - Time Slot
Display IN - 1 conduction time t(s)
Measured value = t × A ÷ B
F13 - Measurement Length F14 – Time Interval

F15 - Absolute Ratio
The absolute value between frequencies of IN - 2 F2 and
IN - 1 F1 is shown in percentage form.
F16 - Error Ratio
The error between the frequency of IN - 2 F2 and IN - 1 F1
is shown in percentage form.
F17 - Rotation Difference
Shows the difference between the speed of IN - 2 N2 and
IN - 1 N1.
F18 - Flow Rate
The flow rate ratio of IN - 2 is shown on the basis of the
frequency of IN - 2 frequency F2 and IN - 1 F1.

9 Technical characteristics and specifications
Model GW621 GW626 GW631 GW636
Panel Size 160 x 80mm 96 x 48mm 160 x 80mm 96 x 48mm
Display 4 bits LED, Red
eight 20.3mm
4 bits LED, Red
eight 20.3mm
6 bits LED, Red
eight 20.3mm
6 bits LED, Red
eight 14.2mm
Display Range -1999 ~ 9999 -199999 ~ 999999
Input
IN - 1 ,IN - 2 ,RST, OLD
No voltage contacts, voltage pulse, collector open circuit
Input voltage: high level 4 ~ 30VDC, low level 0 ~ 1VDC
Minimum width of external reset signal: 20ms
Power Supply 5VDC ±5%, 130mA; 12VDC ±5%, 60mA; 24VDC ±5%, 30mA
Measure Range
F01 / F02 / F04 0 ~ 30 z, 0 ~ 3k z, 0 ~ 100k z
F03 0 ~ 30 z, 0 ~ 3k z, 0 ~ 50k z
F05 / F06 / F07 0.0001 z ~ 100k z
F08 0.0001 z ~ 50k z (Square wave)
F09 / F10 / F11 / F12 10ms ~ 9999s
F13 / F14 0.01 z ~ 50k z
F15 / F16 / F17 / F18 0.01 z ~ 50k z
Accuracy
F05 / F06 / F07 ±0.02%rdg ±1digit
F08 ±0.05%rdg ±1digit
F09 / F10 / F11 / F12 ±0.05%rdg ±1digit
F15 / F16 / F17 / F18 ±0.05%rdg ±1digit
Data Store EEPROM (Nonvolatile memory)
Rewriting times = 100 thousand times
Alarm Output
Reply output: 3A 250VAC / 30VDC (Resistive load)
Electrical life 1000000 times
Mechanical life 100000000 times
Transistor output: 100mA / 35VDC
Converter Output
Current output: 4 - 20mADC (0 – 20mADC, 0 – 10mADC), Maximum load resistance 600Ω
Voltage output: 0 - 10VDC (0 – 5VDC, 1 – 5VDC), Minimum load resistance 2kΩ
Variable output accuracy: ±0.3%FS (4 – 20mADC, 0 – 10VDC)
Communication
RS - 485 (2 lines), the maximum communication distance is 500m, and each host is directly
connected to 63 meters at most
RS - 232C (3 lines), the maximum communication distance is 15m
Baud rate: 2400, 4800, 9600, 19200, 38400bps
Power Supply
100 – 240VAC, allowed band 85 ~ 264VAC 50/60 z
24V AC/DC, allowed band 20 ~ 55VAC 50/60 z
20 ~ 75VDC
Consumption ≤5W
Temperature Working: 0 ~ 50ºC
Storage: -20 ~ 70ºC
umidity ≤85%
Environment Indoor, no dust, no water drops, no oil mist, no corrosion, no serious vibration and impact

10 Other
•This instrument does not have power switches and fuses. If necessary, it can be installed in
external lines.
•Do not install the instrument near devices that can generate strong high frequency waves or
surges (such as high-power converters, motors, welding machines, transformers, etc.). Signal
lines should be separately wired away from power lines with high voltage or high current, and
not parallel to or within the same cable. The signal line should be as short as possible and the
shielded cable must be used when extending the signal line.
•When the instrument is not working normally due to electrical interference, the following
measures can be taken:
1. Install the power filter, and the installation position should be as close as possible to the
instrument.
2. The signal input terminal is connected with the capacitor to filter out the high-frequency
interference signal, and the capacitance is 100pF to 1F. The magnitude of capacitance
affects the maximum frequency of measurement. The larger the capacity, the lower the
frequency of measurement. The specific capacity should be determined according to the
test.
•The following table shows the correspondence between the characters displayed in the display
and the characters in the alphabet.

Matters needing attention:
•Please read the instructions carefully before using the meter.
•The instrument should be used in a standard environment (such as temperature, humidity, etc.).
Please do not close the meter, and keep enough space for heat dissipation.
•Please do not disassemble the meter. There is a possibility of electric shock or malfunction.
When wiring, installing and disassembling, it is necessary to cut off the power supply first.
•Please do not touch the live parts such as power terminals.
Product warranty and after sales service:
1. The product warranty period is 18 months (counting from the date of sale), life-long
maintenance.
2. During the warranty period, when the product breaks down or is damaged in normal use, it will
be guaranteed or replaced free of charge. Any failure or damage caused by user's improper
custody or use, or accidents or other accidents is not covered by the warranty, but the company
can provide maintenance services.
3. Product maintenance will reasonably charge parts and maintenance costs.
Note: this warranty does not include transportation cost and on-site service.