Omron K3GN User manual

9
1/32 DIN Digital Panel Meter K3GN
Compact, Intelligent Panel Meter
Offers NEMA 4X Water Resistance,
Optional Communications Interface
1General-purpose industrial process
meter is ideal for many applications:
Process meter (DC voltage/current input)
RPM processor/Tachometer (frequency input)
Digital data display for PC or PLC (RS-485 communications)
Monitoring conveyor speeds and motor load currents
1Easy to configure from front panel or
using SYS-Config Software
6 analog input ranges available: 4 to 20 mA, 0 to 20 mA; 1 to
5VDC,0to5VDC;--5to+5VDC,--10to+10VDC
5 kHz max input pulse frequency range
Scaling in a wide range of engineering units
Programmable output operation action, decimal point position
setting, teaching function for input range, leading zero
suppression and average processing
+ò
1Advanced display features enhance operator comprehension
5-digit display can be programmed to display red or green characters
Display can be programmed to change color when an output turns on
High-contrast backlit LCD display provides good legibility in most lighting conditions
1High accuracy: ±0.1% full scale
1Selectable outputs: 2 relay outputs, 3 transistor outputs, RS-485 communications
1Compact 1/32 DIN size saves panel space and shallow mounting depth allows thinner
control cabinets: measures 48 W x 24 H x 83 D mm (1.89 x 0.94 x 3.27 inches)
Ordering Information
3PANEL METERS
Input type Supply
l
t
Output Part number
y
y
voltage No communications RS-485 communications
DC voltage/current, NPN 24 VDC Dual relays (SPST-NO) K3GN-NDC 24VDC K3GN-NDC-FLK 24VDC
g
,
Three NPN open collector K3GN-NDT1 24VDC K3GN-NDT1-FLK 24VDC
DC voltage/current, PNP Dual relays (SPST-NO) K3GN-PDC 24VDC K3GN-PDC-FLK 24VDC
g
,
Three PNP open collector K3GN-PDT2 24VDC K3GN-PDT2-FLK 24VDC
3PROGRAMMING SOFTWARE
Description Part number
Sets all panel meter parameters, initiates teaching function. Use with RS-485 communications models. SYS-CONFIG V2.0

K3GN
K3GN
2
3MODEL NUMBER LEGEND
K3GN - - 24 VDC
12 3
1. Input Type
ND: DC voltage/current, NPN
PD: DC voltage/current, PNP
2. Output Type
C: 2 relay contact outputs (SPST-NO)
T1: 3 transistor outputs (NPN open collector)
T2: 3 transistor outputs (PNP open collector)
3. Communications Output Type
None: Communications not supported
FLK: RS-485
Specifications
3RATINGS
Supply voltage 24 VDC
Operating voltage range 85% to 110% of the rated supply voltage
Power consumption (See Note) 2.5 W max. (at max. DC load with all indicators lit)
Insulation resistance 20 MΩmin. at 500 VDC between external terminal and case.
Insulation provided between inputs, outputs, and power supply.
Dielectric withstand voltage 1,000 VAC for 1 min between external terminal and case.
Insulation provided between inputs, outputs, and power supply.
Noise immunity ±480 V on power supply terminals in normal mode, ±1,500 V in common mode,
±1µs, or 100 ns for square-wave noise with 1 ns
Vibration resistance Malfunction 10 to 55 Hz, 10 min each in X, Y, and Z directions; acceleration: 9.8 m/s2
Destruction 10 to 55 Hz, 30 min each in X, Y, and Z directions; acceleration: 19.6 m/s2
Shock resistance Malfunction Models with transistor outputs: 196 m/s2for 3 times each in X, Y, and Z directions
Models with relay contact outputs: 98 m/s2for 3 times each in X, Y, and Z directions
Destruction 294 m/s2for 3 times each in X, Y, and Z directions
Ambient temperature Operating -- 1 0°Cto55
°C(14 °F to 131°F) with no condensation or icing
Storage -- 2 5°Cto65
°C(--13 °F to 149°F) with no condensation or icing
Ambient humidity Operating 25% to 85% with no condensation
Ambient atmosphere Must be free of corrosive gas
EMC Emission Enclosure EN55011 Group 1 class A
Emission AC Mains EN55011 Group 1 class A
Immunity ESD EN61000-4-2: 4-kV contact discharge (level 2)
8-kV air discharge (level 3)
Immunity-RF-interference ENV50140: 10 V/m (amplitude modulated, 80 MHz to 1 GHz) (level 3)
10 V/m (pulse modulated, 900 MHz)
Immunity Conducted Disturbance ENV50141: 10 V (0.15 to 80 MHz) (level 3)
Immunity Burst EN61000-4-4: 2-kV power-line (level 3)
2-kV I/O signal-line (level 4)
Approved standards UL Listed, File No. E41515 to UL508 standard
CSA Certified, File No. LR67027 to CSA22.2 No. 142--M1987 standard
Conforms to EN50081-2, EN50082-2, EN61010-1 (IEC1010-1); conforms to
VDE106/part 100 (finger protection) when the terminal cover is mounted.
Weight Approx. 100 g
Note: A control power supply capacity greater than the rated capacity is required when the Digital Panel Meter is turned ON. Do not for-
get to take this into consideration when using several Digital Panel Meters. When power is supplied, all indicators will light and
outputs will be OFF. When using startup compensation time operation, the display will read “ööööö” and all outputs will be OFF.

K3GN K3GN
3
3INPUT/OUTPUT RATINGS
Relay Contact Output
(Incorporating G6K Relays)
Load type Resistive load (cosφ=1)
Rated load 1 A at 30 VDC
Rated carry current 1 A max. (at COM terminal)
Max. contact voltage 60 VDC
Max. contact current 1 A (at COM terminal)
Max. switching capacity 30 VA
Min. permissible load
(P level, reference value) 10 mV, 10 µA
Mechanical life 50,000,000 times min. (at a switching frequency of 36,000 times/hr)
Electrical life
(at an ambient temperature of 23°C) 100,000 times min. (at the rated load with a switching frequency of 1,800 times/hr)
Transistor Output
Rated load voltage 24 VDC
Max. load current 50 mA
Leakage current 100 µAmax.
3COMMUNICATIONS
Communications type RS-485
Transmission method 2-wire, half-duplex
Synchronization method Start-stop synchronization
Baud rate 1,200/2,400/4,800/9,600/19,200 bps
Transmission code ASCII
Communications Reading/Writing
to the K3GN Read/write set values, read/write scaling values, enable/disable the writing of data through communications, forced-zero control, and other data.
Refer to
N102 Operation Manual
for more details.
3MEASURING RANGES
Process Voltage/Current Inputs
Input Measuring range Measuring accuracy Input impedance Displayable range
DC volta
g
e1.000 to 5.000 V/ ±0.1% FS ±1di
g
it max. 1M
Ωmin. --19999 to 99999
D
C
v
o
l
t
a
g
e
1
.
0
0
0
t
o
5
.
0
0
0
V
/
0.000 to 5.000 V
±
0
.
1
%
F
S
±
1
d
i
g
i
t
m
a
x
.
at 23±3°C (73.4±5.4°F)
1
M
Ω
m
i
n
.
1
9
9
9
9
t
o
9
9
9
9
9
(with scaling function)
--5.000 to 5.000 V ±0.1% FS ±1 digit max.
t
2
3
5
°
C
(
7
3
4
9
°
F
)
(
w
i
t
h
s
c
a
l
i
n
g
f
u
n
c
t
i
o
n
)
--10.00 to 10.00 V
g
at 23±5°C (73.4±9°F)
DC current 4.00 to 20.00 mA/ ±0.1% FS ±1di
g
it max. 60 Ω
D
C
c
u
r
r
e
n
t
4
.
0
0
t
o
2
0
.
0
0
m
A
/
0.00 to 20.00 mA
±
0
.
1
%
F
S
±
1
d
i
g
i
t
m
a
x
.
at 23±3°C (73.4±5.4°F)
6
0
Ω
No-voltage Contact/Open Collector Inputs
Input Measuring range Measuring accuracy
at 23±5°C (73.4±9°F) Displayable range
No-voltage contact (30 Hz max.) with
ON/OFF pulse width of 16 ms min. 0.05 to 30.00 HZ ±0.1% FS ±1 digit max. --19999 to 99999
(with scaling function)
Open collector (5 kHz max.) with
ON/OFF pulse width of 90 µsmin. 0.1 to 5000.0 HZ
(
w
i
t
h
s
c
a
l
i
n
g
f
u
n
c
t
i
o
n
)
3DIGITAL DATA DISPLAY (BY RS-485 COMMUNICATION)
Displayable range --19999 to 99999

K3GN
K3GN
4
3CHARACTERISTICS
Input signal Process voltage
(1to5V,0to5V,--5to+5V,
-- 10 t o +1 0 V)
Process current
(4 to 20 mA, 0 to 20 mA)
No-voltage contact
(30 Hz max. with ON/OFF pulse
widthof16msmin.)
Open collector
(5 kHz max. with ON/OFF pulse
width of 90 µsmin.)
Digital data display
(by RS-485 communication)
A/D conversion
method Double integral method ---
Sampling period 250 ms ---
Display refresh
period Sampling period (sampling times multiplied by number of averaging times if average processing is selected.)
Pulse measurement
method --- Periodic measurement ---
Connectable
sensors --- ON residual voltage: 2.5 V max. OFF leakage current: 0.1 mA max.
Load current: Must have a switching capacity of 15 mA min.
Must be able to reliably switch load currents of
5mAmax.
Max. displayed digits 5 digits (--19999 to 99999)
Display 7-segment digital display, character height: 7.0 mm (0.28 in)
Polarity display “--” is displayed automatically with a negative input signal
Zero display Leading zeros are not displayed
Scaling function Programmable with front-panel key inputs (range of display: --19999 to 99999). The decimal point position can
be set as desired.
External controls
(See Note 1) HOLD: Measurement value held ZERO: Forced zero --- HOLD: Measurement value held ZERO: Forced zero
Hysteresis setting Programmable with front-panel key inputs (0001 to 9999)
Other functions Programmable Color Display (red and/or green; display can change color when output turns on)
Selectable output operating action
Teaching set values
Average processing (simple average)
Lockout configuration
Communications writing control (communications output models only)
Forced-zero set with front panel
keys
Control inputs (HOLD/ZERO)
selection via front panel keys
Field calibration
Startup compensation time
(0.00to99.9s)
Auto-zerotime(0.0to19.9s)
Forced-zero set with front panel
keys
Control inputs (HOLD/ZERO)
selection via front panel keys
Output Relays: 2 SPST-NO
Transistors: 3 NPN open collector
3 PNP open collector
---
Combinations:
Communications output (RS-485) + relay outputs (2 SPST-NO);
Communications output (RS-485) + transistor outputs (3 NPN open collector);
Communications output (RS-485) + transistor outputs (3 PNP open collector)
Communications Communications function: RS-485 (See Note 2)
Delay in comparative
outputs
(transistor outputs)
750 ms max.
Enclosure ratings Front panel: NEMA 4X for indoor use (equivalent to IP66)
Rear case: IEC standard IP20
Terminals: IEC standard IP20
Memory protection Non-volatile memory (EEPROM; possible to rewrite 100,000 times)
Note: 1. The minimum input time for control signals is 80 ms.
2. Refer to
N102 Operation Manual
for more details.

K3GN K3GN
5
Nomenclature
1. Main display
2. Status indicators
3. Level indicator
4. Level key
2. Status indicators
7. Up/Zero key
6. Shift key5. Mode key
Name Functions
1. Main display Displays process values, parameters, and set values.
2. Status indicators OUT1 Lit when output 1 is ON.
OUT2 Lit when output 2 is ON.
SV Lit when a set value is being displayed or changed.
TLit when the teaching function is enabled. Flashes when the K3GN is in teaching operation.
Lit when a calibration value is being displayed during user calibration. Flashes while reading a
calibration value.
ZERO Lit while the forced-zero function is activated.
HOLD Lit when HOLD input is ON.
CMW Lit when communications writing is “enabled” and is out when it is “disabled.”
3. Level indicator Displays the current level that the K3GN is in. (See below for details.)
4. Level Key Used to change the level.
5. Mode Key Used to allow the Main display to indicate parameters sequentially.
6. Shift Key Used to enable that set value to be changed. When changing a set value, this key is used to
move along the digits.
7. Up/Zero Key Used to change a set value. Used to set or clear a forced-zero function when a measurement
value is being displayed.
Level indicator Level
)Protect
Not lit Operation
æAdjustment
,Initial setting
äCommunications setting
áAdvanced function setting
.User calibration

K3GN
K3GN
6
Operation
3MAIN FUNCTIONS
Input Types and Ranges
Input type (setting parameter) Function Input range (setting parameters) Setting range
Analog input (æ'æ% )Selects DC voltage/current
i
l
i
t
4to20mA/0to20mA(
òôö)Displayable from --19999 to
9
9
9
9
9
i
t
h
l
i
f
t
i
a
o
g
u
(
)
g
signal input. 1to5V/0to5V(
õñ)
y
99999 with scaling function.
T
h
e
p
o
s
i
t
i
o
n
o
f
t
h
e
d
e
c
i
m
a
l
--5to+5V(
ñ)
T
h
e pos
i
t
i
on o
f
t
h
e
d
ec
i
ma
l
point can be set as desired.
-- 10 t o +1 0 V (õö)
o
i
n
t
c
a
n
b
e
s
e
t
a
s
d
e
s
i
r
e
d
.
Pulse input ().%,â)Selects pulse input signal. 0.05 to 30 Hz (óö)
u
s
e
u
(
)
g
0.1to5kHz(
,$)
Remote (+&-)Displays digital data from PLC or
PC. ---
Scaling
-Analog (Process) Inputs
The K3GN converts input signals into desired physical values.
INPUT2: Any input value
DISPLAY2: Displayed value corresponding to INPUT2
INPUT1: Any input value
DISPLAY1: Displayed value corresponding to INPUT1
Input value
INPUT1 INPUT2
Input value
Displayed value Displayed value
DISPLAY1 DISPLAY2
DISPLAY1 DISPLAY2
INPUT2 INPUT1
-Pulse Frequency
The K3GN converts pulse signal inputs into desired units such as
revolutions or rotational speeds.
The slope of the linear relationship between the input value and
display value is calculated automatically when an input value and
its corresponding display value are entered.
Input value: Any arbitrary input value
Display value: Desired display value corresponding to input value
If scaling for pulse signals is not performed, the input frequency
will be displayed.
The relationship between input, f, and display, Y, is expressed in
the form Y = f ×
a
(multiplication factor). The value of
a
will vary
according to the display unit. For example, if the display unit is
rpm, Y is given by the following:
Y=f×1/N ×60 (i.e.,
a
=1/N×60)
where N is the number of pulses per revolution.
If the display unit is m/min, Y is given by the following:
Y=f×π d×1/N ×60 (i.e.,
a
=πd×1/N ×60)
where πd = the wavelength (m) per revolution.
Example: When displaying the rotational speed (rpm) for a
machine that generates 5 pulse signals per revolution, Y is given
by the following:
Y=f×1/5 ×60,
so if f = 1, then Y = 12. Therefore, input 1 for "') and 12 for ã,).
Input value
Displayed value
K3GN
Proximity Sensor
ã,)
"')
Average Processing
The average processing function stabilizes displayed values by
averaging the corresponding input signals that fluctuate
dynamically.
Hysteresis
The hysteresis of comparative outputs can be set to prevent the
chattering of relay or transistor outputs.
Upper limit (high acting)
Set value
Output ON
OFF
Hysteresis
Measurement value

K3GN K3GN
7
Startup Compensation Time (Pulse Input Only)
The startup compensation time parameter keeps the measure-
ment operation from sending an unnecessary output correspond-
ing to instantaneous, fluctuating input from the moment the K3GN
is turned ON until the end of the preset period.
The compensation time can be set in a range from 0.0 to 99.9
seconds as the waiting time until the devices subject to measure-
ment become stable after the startup of the power supply.
Changing the Display Color
The display can be programmed to change color when an output
turns ON. In an example, the K3GN can be programmed to
display Green for normal, and Red for errors. The color can be
set to change from either green to red or red to green when
output turns ON.
K3GN can also be programmed to display only one unchanging
color: Red or Green.
Teaching
An actual measured value as a set value without any front panel
key input can be set with the teaching function. Teaching is useful
for making settings while checking the operation status of K3GN.
Forced-zero Function
The zero point value can be shifted (tare) to a desired value
(such as might be required when adjusting reference values) with
one touch of the Up/Zero Key on the front panel.
OUT1
OUT2
SV
ZERO
HOLD
CMW
Configurable Output Operating Action
Output 1 and output 2 can be set to operate in one of the 3 following modes:
-Upper limit (High Acting):
The output is turned ON when the measured value is greater than its set value.
-Lower limit (Low Acting):
The output is turned ON when the measured value is less than its set value.
-Upper and lower limits (Outside band Acting):
An upper limit (H set value) and lower limit (L set value) can be set independently.
The output is turned ON when the measured value is greater than upper-limit set value or less than the lower-limit set value.
Only transistor outputs have a PASS output which is output when both OUT1 and OUT2 are OFF.
Upper Limit (High Acting)
OUT1/2 set value
Measurement value
ON
OFF
Output
Hysteresis
Lower Limit (Low Acting)
OUT1/2 set value
ON
OFF
Output
Hysteresis
Upper and Lower Limits
(Outside Band Acting)
Upper-limit set value
for OUT1/2
Hysteresis
Measurement value
Hysteresis
Lower-limit set value
for OUT1/2 ON
OFF
Output
Measurement value
The three types of output operations shown above can be combined as desired. The following are examples of possible combinations.
Upper Limit 2-stage Output
OUT2
set value
OUT1
set value
Threshold Output
Upper-limit OUT2
set value
Upper-limit OUT1
set value
Lower-limit OUT1
set value
Lower-limit OUT2
set value
ON
OFF
OUT2
ON
OFF
OUT1
Combination of Upper Limit and
Upper/Lower Limits
Upper-limit
OUT2 set value
OUT1 set value
Lower-limit
OUT2 set value
ON
OFF
OUT2
ON
OFF
OUT1
ON
OFF
OUT2
ON
OFF
OUT1
Measurement
value
Measurement
value
Measurement
value

K3GN
K3GN
8
3EXTERNAL CONNECTIONS
Terminal Arrangement
Output terminals
Input terminals
Models without
communications
Models with
communications
NC NC
RS-485
B(+) A(--)
78
78
C
Models with NPN inputsModels with PNP inputs
Operation
power supply
24 VDC
123
123
Event or pulse/contact input
Event or pulse/contact input
A
Models withModels with relay outputsNPN transistor outputs
Analog input Models with
PNP transistor outputs
9101112
9101112
9101112
OUT1
PASS
NC
OUT2
COM
OUT1
OUT2
COM
OUT1 PASS OUT2 COM
D
Voltage Current
Analog input
456
B
CD
AB
78 9101112
123 456
COM
Operation
power supply
24 VDC
Terminal No. Function Description
$-%Operation power Connect the operation power supply.
&-%Event input or pulse/contact input Operates as follows depending on
parameter setting:
•Holds process value.
&-$•Calibratetheprocessvaluetozeroand
clear the forced-zero function.
•Pulse or contact input.
',)-(Analog input Connect the voltage or current analog
input.
*-+Communications RS-485 communications terminals.
,,.-/Outputs Outputs relay or transistor outputs. There is
a
l
s
o
a
P
A
S
S
o
u
t
p
u
t
f
o
r
m
o
d
e
l
s
w
i
t
h
,,-,.-/a
l
so a
P
A
S
S
output
f
or mo
d
e
l
sw
i
t
h
transistor outputs.

K3GN K3GN
9
3INPUT CIRCUITS
Analog Input (DC Voltage/Current)
Voltage input
COM 5
4Current input
COM 5
6To A/DTo A/D
A
60 Ω
A+B=1 MΩ
B
Pulse Input/Control Event Input (HOLD/ZERO)
2
3
PNP Input
NPN Input
24 VDC +
4.7 kΩ
2.35 kΩ
Hold/Zero Pulse 3
4.7 kΩ
2.35 kΩ
2
Hold/Zero Pulse
24 VDC --
24 VDC +
24 VDC --
11
3OUTPUT CIRCUITS
Contact Output
9
11
12
5V
5V
OUT1
OUT2
OUT3
Transistor Output
9
10
11
12
8.2 Ω
8.2 Ω
8.2 Ω
OUT1
OUT2
PASS
COM
NPN output
9
10
11
12
8.2 Ω
8.2 Ω
8.2 Ω
OUT1
OUT2
PASS
COM
PNP output

K3GN
K3GN
10
3BLOCK DIAGRAM
DisplayKey
Micro-
computer
Drive circuit
Drive circuit
Drive circuit Communica-
tions driver
Output
circuit
Transistor output
(See Note 1)
Contact output
(See Note 2)
Communications terminal
(See Note 3)
Constant voltage circuit 1
Power supply circuit
Control input
circuit Waveform
rectification
circuit
Input circuit
Analog input
terminal
Note: 1. Transistor output models only.
2. Relay output models only.
3. Models with communications functions only.
Operating power supply
Constant voltage circuit 2
Pulse/
Control
input
terminal
EEPROM
A/D
conversion
circuit

K3GN K3GN
11
3LEVELS
“Level” refers to a grouping of parameters. The following table lists the operations that are possible in each of the levels, and how to move
between levels. There are some parameters that are not displayed for certain models.
Level name Function Measurement
Protect Setting lockouts. Continue
Operation Displaying process values, setting/clearing forced-zero function,
and setting OUT 1/2 set values. Continue
Adjustment Setting communications writing control. Continue
Initial setting Making initial settings of input type, scaling, output operating
action, and other parameters. Stopped
Communications setting Setting baud rate, word length, and other communications data. Stopped
Advanced function setting Setting average processing, display color settings, and other
advanced function parameters. Stopped
Calibration Setting user calibration of the inputs. Stopped
Protection
Operation Adjustment
Power ON
+
Time set
by user
+
1smin. õôóò÷ñ
Flashing stops if key
is released.
1smin.
Initial setting Communications
setting
Password “--0169”
1smin.
Advanced function
setting
Calibration
Password “1201”
Continue to press the key for 2 s min.
Indicates change of level.
1smin.
Less than 1 s
Less than 1 s
(See Note)
Note: The move to protection level time can be set in the advanced function setting level.

K3GN
K3GN
12
3PARAMETERS
1. There are some parameters that are not displayed for certain models.
2. The K3GN will stop measurement if the level is changed to the initial setting level, the advanced function setting level, the commu-
nications setting level, or the calibration level.
3. If the input range is changed, some parameters are set to default values. Therefore, set the input range first.
4. Settings displayed in reverse black/white are initial settings.
Adjustment level
Commu-
nications
writing con-
trol
Press Level Key for less than 1 s.
Power ON
Operation level
Set one of these.
Set one of these.
Process value
OUT1
set value
Upper-limit
OUT1 set
value
Lower-limit
OUT1 set
value
OUT2
set value
Upper-limit
OUT2 set
value
Lower-limit
OUT2 set
value

K3GN K3GN
13
Press Level Key for less than 1 s.
Press Level Key
formorethan3s.
For analog input
For pulse input
For analog/
remote input
For pulse input
Press Level Key for more than 1 s.
Enter password “--0169”
Unit: times
Unit: s
Unit: s
Unit: s
Unit: ms
For pulse input
Press Level
Key for
more than 1 s. Input type
Analog
input
range
Input-pulse
frequency
range
Input
value 1
for
scaling
Display
value 1
for
scaling
Input
value 2
for
scaling
Display
value 2 for
scaling
Input
value for
scaling
Display
value for
scaling
Decimal
point
position
Operating
Action for
OUT1 set
value
Operating
Action for
OUT2 set
value
Move to
advanced
function
setting level
Analog
Pulse
Remote
(digital
data display)
Commu-
nications
unit no.
Baud rate
Word
length
Stop bits
Parity bits None
Even
Odd
Communications
setting level
Advanced function
setting level
Initial setting level
Parameter
initialization
Average
processing
HOLD/
ZERO
selection
OUT1
Hysteresis
OUT2
Hysteresis
Auto-zero
time
Startup
com-
pensation
time
Display
color
change
Display
Auto-return
time
Move-to-
protect-
level time
Send
waiting
time
Move to
calibration
level
Green (red)
Green
Red (green)
Red
For analog/
remote input
Unit: Hz
Upper Limit
Lower Limit
Upper/Lower
Limits
Upper Limit
Lower Limit
Upper/Lower
Limits
Unit: s
For analog input
Enter password “1201” Calibration level

K3GN
K3GN
14
Protect level
Operation/adjustment
lockouts
Initial setting/commu-
nications lockouts
Forced-zero shift
lockout
Setting change lockout
•Prohibits menu display, writing, etc., for
operation level and adjustment level.
•Prohibits setting changes using front panel
keys.
•Prohibits use of the forced-zero function using
front panel keys.
•Prohibits access to menu display, initial setting
level, communications setting level, and
advanced function setting level.
)
)
)
)
Operation/Adjustment Lockouts
Prohibits key operations for operation level and adjustment level.
Setting Operation level Moving to
d
j
t
t
g
Process value
display Set value display
g
adjustment
level
0Allowed Allowed Allowed
1Allowed Allowed Prohibited
2Allowed Prohibited Prohibited
-Initial setting is 0.
-When the set value is 0 (the initial setting), protection is not
set.
Setting Change Lockout
Prohibits setting changes.
Setting Meaning
OFF Setting changes using front panel keys allowed (i.e.,
it is possible to move to the state where changes to
settings can be made).
ON Setting changes using front panel keys prohibited
(i.e., it is not possible to move to the state where
changes to settings can be made).
-The initial setting is OFF.
Note: Changes to protection level parameters, moving to
advanced function setting level, and moving to calibration
level are all allowed.
Initial Setting/Communications Lockouts
Prohibits moving to the initial setting level, the communications
setting level, and the advanced function setting level.
Setting Moving to initial
setting level Moving to communications setting level
0Allowed (message for
moving to advanced
function setting level
displayed)
Allowed
1Allowed (message for
moving to advanced
function setting level
not displayed)
Allowed
2Prohibited Prohibited
-The initial setting is 1.
Forced-zero shift Lockout
Prohibits the setting or clearing of a forced-zero using the front
panel key.
Setting Meaning
OFF Executing and clearing of forced-zero allowed.
ON Executing and clearing of forced-zero prohibited.
-The initial setting is OFF.

K3GN K3GN
15
3INITIAL SETTINGS
Press the Level Key Pfor 3 s min. to move to the initial setting
level.
Select the input type and specify the analog input range or pulse
frequency input range.
Set the scaling values and specify output operating action as
required.
With communications output models, press the Level Key Pfor
less than 1 s to move to the communications setting level.
After making communications settings, press the Level Key P
for less than 1 s to move to the initial setting level.
Move to the advanced function setting level and make settings
for average processing, HOLD/ZERO selection, hysteresis val-
ues, auto-zero time, startup compensation time, display color
programming, and other advanced function parameters as
required.
Press the Level Key Pfor less than 1 s min. to return to the
operation level.
Specify set value of OUT 1 and 2.
Measurement starts.
Power ON

K3GN
K3GN
16
3APPLICATION AS A PROCESS METER
The initial settings required when using the K3GN a process
meter are explained below using the following example.
Setting Example
Inputs in the range 1 to 5 V are scaled to the range 0 to 100.0 kg
and displayed. If the measurement value goes over 70.0 kg,
output 1 turns ON. If the measurement value goes below 50.0 kg,
output 2 turns ON.
100.0 kg
0.0 kg 1.000 V 5.000 V Input value
Output 2 Output 1
50.0 kg 70.0 kg
Normal
Displayed
value
Initial Setting Procedure
1. Check the wiring and turn ON the power.
2. Set analog input as the input type.
If a measurement value is displayed (operation level), move
to the initial setting level by holding down the Level Key for
3smin.
Set parameter "'-to æ'æ% .
3. Set the analog range to 1 to 5 V.
Set parameter +æ' â to õñ.
4. Set the scaling values.
Set parameter "')÷õ to õ÷ööö.
Set parameter ã,)÷õ to ö.
Set parameter "')÷ô to ñ÷ööö.
Set parameter ã,)÷ô to õööö.
5. Set the position of the decimal point.
Set parameter ã) to üüüü÷ü.
6. Operating action for OUT1 and OUT2 set values.
Set parameter (.-õ÷- to !".
Set parameter (.-ô÷- to %(.
7. Set OUT1 set value to 70.0 and OUT2 set value to 50.0.
If an initial setting level parameter is displayed, press the
Level Key for 1 s min. to return to the operation level.
Set parameter (.-õ to ïö÷ö.
Set parameter (.-ô to ñö÷ö.
8. Start actual operation.
3APPLICATION AS A TACHOMETER
The initial settings required when using the K3GN as a tachometer are explained below using the following example.
Setting Example
The speed of a conveyor belt is displayed in m/min units. For every revolution of the
shaft, 4 pulses are output. the diameter of the axis of rotation is 12 cm. If the Rotational
speed goes over 10.500 m/min, output 1 turns ON. If the speed goes below 9.500
m/min, output 2 turns ON.
Output 2 Output 1
9.500
m/min 10.500 m/min
Normal
12 cm
Deciding the Scaling Value
Rotational speed (m/min) = π×Diameter (m) ×Revolutions
per minute (rpm)
Revolutions per minute (rpm) = Input frequency (Hz) ÷Number
of pulses per revolution ×60
Applying the appropriate values to these 2 equations gives:
Speed (m/min) = 5.654866... ×Input frequency (Hz)
Multiply by 1,000 to display the first 3 digits to the right of the
decimal point.
Speed (m/min) = 5654.866... ×Input frequency (Hz)
56549
10 Hz Input value
To limit inaccuracies due to scaling, select a round number
(e.g., 10) as the input value and select a display value of as
many digits as possible. In this example, scaling is performed
so that an input value of 10 gives a displayed value of 56549.
Displayed
value
Initial Setting Procedure
1. Check the wiring and turn ON the power.
2. Set pulse input as the input type.
If a measurement value is displayed (operation level), move
totheinitialsettinglevelbyholdingdowntheLevelKeyfor3s
min.
Set parameter "'-to ).%,â.
3. Set the pulse frequency to 30 Hz.
Theinputpulsefrequencyfortheapplicationisapproximately
2 Hz and so can be assumed not to exceed 30 Hz. Set
parameter )á+â to óö.
4. Set the scaling values.
Set parameter "') to õö.
Set parameter ã,) to ñðñòí.
5. Set the decimal point.
Set parameter ã) to üü÷üüü.
6. Operating action for OUT1 and OUT2 set values.
Set parameter (.-õ÷- to !".
Set parameter (.-ô÷- to %(.
7. SetOUT1setvalueto10.500andOUT2setvalueto9.500.
If an initial setting level parameter is displayed, press the
Level Key for 1 s min. to return to the operation level.
Set parameter (.-õ to õö÷ñöö.
Set parameter (.-ô to í÷ñöö.
8. Start actual operation.

K3GN K3GN
17
3APPLICATION EXAMPLES
Detection of Dust Exhaust
The change in the density of the dust is detected via the E3SA
and discriminated by the K3GN.
Exhaust
Grinder Dust collecting machine
E3SA
4to20mA
K3GN
OUT1OUT2
(Upper upper-
limit alarm)
Device stops
(Upper-limit
alarm) Output
reduction
instruction
Monitoring of Tank Pressure
The output of the pressure sensor is processed and the pressure
is displayed. Remote monitoring of the operation is possible with
the communications function.
E8AA
Pressure
Sensor
Foam
Beer
Tank Exhaust valve
Pump
K3GN
Host PC
485 232C
Monitoring Difference between Two Line Speeds
The difference between the two line speeds is calculated by the
PLC and the result is written via RS-485 to the K3GN where it is
displayed. RS-485 communications output
(calculation result)
K3GN
(Set the in-
put type to
“Remote”.))
Monitoring of Motor Load Current
The K3GN can monitor the current of a motor and warn of
excessive motor loads. If the startup time compensation of the
K3GN is enabled, the K3GN will not be influenced by the inrush
current from starting the motor, and no signal will be output from
the K3GN.
Power supply
Electromag-
netic relay Signal input
K3GN
K3FK
CT Converter
24-VDC power supply
OUT1
(Upper
-
limit
alarm)
OUT2
(Lower
-
limit
alarm)
Position Indication on X-Y Table
The position on the X-Y table is calculated by the PLC and the
result is written via RS-485 to the K3GN where it is displayed.
Thescalingfunctioncanbeusedtodisplaytheresultin
millimeter units.
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X
Y
PLC
mm
mm
X-Y Table
RS-485 Communica-
tion output
öö
õóñ÷ò
K3GN
(Set the in-
put type to
“Remote”.))

K3GN
K3GN
18
Monitoring the Remaining Quantity of Soup
The distance to the surface of the soup is detected with an
ultrasonic sensor and, based on this distance, the K3GN displays
the remaining quantity. When the remaining quantity of soup
decreases to less than 20%, the K3GN lights the “Replenish”
indicator.
OUT1
Ultrasonic sensor 4 to 20 mA K3GN
Volume of soup
Small
Large
Medium
Replenish
cup
cup
cup
100 %
20 %
Monitoring Number of Motor Revolutions
Power supply Signal input
24 VDC power supply
Electromagnetic
relay
0to1A
4to
20 mA
K3FK CT
Converter K3GN-NDC
E2E Proximity
Sensor K3GN-NDC
OUT1 (Upper limit)
OUT1 (Upper limit)
OUT2 (Lower limit)
OUT2 (Lower limit)
Dimensions
Unit: mm (inch)
Main Display Character Size
Note: The panel meters cannot be made
waterproof when gang-mounted.
Panel Cutouts
Separate
mounting Gang Mounting
(48 ×No. of Panels -- 2.5) +1.0
0
40
(1.57)
min.
22.2
(0.87)
22.2
(0.87)
45
(1.77)
3.6 (0.14)
7 (0.28)
35
(1.38)
24
(0.95)
3
(0.12) 80 (3.15)
22
(0.87)
+0.3
0
+0.6
0
+0.3
0
44.8
(1.76)

K3GN K3GN
19
Precautions
WARNING
Donottouchtheterminalswhilepowerisbeingsupplied.Elec-
trical shock may result. Also,donot touchtheterminals witha
screwdriver while power is being supplied. Electrical shock
may result via the screwdriver.
Donotallowpiecesofmetalorwireclippingstoentertheprod-
uct. Electrical shock, fire, or malfunction may result.
Caution
Do not attempt to disassemble, repair, or alter the product.
Electrical shock, fire, or malfunction may result.
Do not use the product where flammable or combustible
gasses are present.
The service life of the output relays depends on the switching
capacity and switching conditions. Consider the actual ap-
plication conditions and use the product within the rated load
and electrical service life.
Always maintain the load within ratings. Damage or burning
may result if the ratings are exceeded.
Always maintain the power supply voltage within specifica-
tions. Damageorriskoffiremayresultifthespecificationsare
exceeded.
Tighten the terminal screws securely. The recommended
tightening torque is 0.5 N :m. Loose screws may result in
product failure or malfunction.
Performcorrectsettingoftheproductaccordingtotheapplica-
tion.Failuretodosomaycauseunexpectedoperation,result-
ing in damage to the unit or injury.
This product is not a safety device. Product failure may pre-
ventoperationofcomparativeoutputs.Takesafetymeasures,
such as installing a separate monitoring system, to ensure
safety and to prevent serious accidents caused by such fail-
ure, thus ensuring safety.
Observe the following precautions to ensure safety:
1. Do not connect anything to unused terminals.
2. Be sure to check each terminal for correct number and polar-
ity before connection. Incorrect or reverse connection may
damage or burn out internal components of the K3GN.
3. Do not use the product in locations subject to the following:
:Dust or explosive gasses (e.g., sulfuric gas or ammonia
gas).
:Condensation or icing as a result of high humidity.
:Outdoors or in direct sunlight.
:Splashing liquid or oil atmosphere.
:Direct radiant heat from heating equipment.
:Extreme changes in temperature.
4. Do not block heat dissipation around the product, i.e., provide
sufficient space for heat dissipation. Do not block the ventila-
tion holes on the back of the product.
5. Do not use paint thinner for cleaning. Use commercially avail-
able alcohol.
6. Use a power supply meeting the power supply specifications
of the K3GN. Be sure that the rated voltage is achieved with-
in 2 s after turning ON the power.
7. Use the K3GN within the specified temperature and humidity
ranges. When installing the K3GN in a panel, be sure that the
temperature around the K3GN (not the temperature around
the panel) does not exceed 55°C (131°F).IftheK3GNis
subject to radiant heat, be sure that the temperature of the
surface of the K3GN exposed to the radiant heat does not
exceed 55°C (131°F) by providing a fan or other heat
removal method.
8. Store the K3GN within the specified temperature and
humidity ranges.
9. Do not lay heavy objects on the product during use or
storage. Doing so may deform or deteriorate the K3GN.
10. Conduct aging for 15 minutes min. after power is ON for
correct measurement.
Mounting
Recommended panel thickness is 1 to 5 mm (0.04 to 0.20 inch).
Insert the K3GN in the square cutout, insert the adapter from the
back, and push the K3GN into the cutout as far as possible. Use
screws to secure the K3GN. To make the K3GN waterproof,
insert watertight packing in the K3GN.
Install the watertight packing in the proper direction. Note that the
packing is direction-sensitive.
When gang-mounting two or more products in a cutout, be sure
that the ambient temperature does not exceed the specifications.
Mount the K3GN as horizontally as possible.
Separate the K3GN from machines generating high-frequency
noise, such as high-frequency welding machines and
high-frequency sewing machines.
Operation
A K3GN model with a relay contact or transistor output may not
output any alarm signal normally if the model has an error. It is
recommended that an independent alarm device be connected to
the model.
The parameters are factory-set so that the K3GN will operate
normally. The settings of the parameters may be changed
according to the application.
Wiring
Wire the power supply with the correct polarity. Wiring with
incorrect polarity may result in damage or burning.
Wire the terminals using crimp terminals.
Tighten terminal screws to a torque of approx. 0.5 N :m.
Wire signal lines and power lines separately to reduce electrical
noise and interference.
Use M3 crimp terminals of the type shown below.
5.8 mm (0.23 in) max.
5.8 mm (0.23 in) max.
!
!

K3GN
K3GN
3TROUBLESHOOTING
When an error occurs, error details will be displayed on the main display. Confirm the error from the main display and take the appropriate
countermeasures.
Main display Level
display Error contents Countermeasure
âõõõ (E111) Not lit RAM memory error Turn the power supply OFF and ON again. If the same error is
displayed even after the power is turned OFF and ON, it is
n
e
c
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s
s
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p
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e
m
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a
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n
i
s
r
e
s
t
o
r
e
d
âõõõ (E111) ñEEPROM memory
error
necessary to replace the memory. If normal operation is restored
by turning the power supply OFF and ON, it is possible that there
is noise interference. Check that there is nothing in the vicinity that
may be the source of noise.
,։++ (S.Err)
(Flashes at 0.5-s intervals) Not lit Input error Check for incorrect input wiring, for disconnected power lines, for
short-circuiting, and the input type.
ííííí
(Flashes at 0.5-s intervals) Not lit Greater than
displayable range This is not an operational error. These messages are displayed
when a value to be displayed lies outside the displayable range,
e
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n
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e
i
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p
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õíííí
(Flashes at 0.5-s intervals) Not lit Less than
displayable range
even if the input value is within the input range and the range for
which measurement is possible.
Bring the input value and display value within range.
Cat. No. N101-E3-1 04/00 Specifications subject to change without notice. Printed in U.S.A.
OMRON ELECTRONICS, INC.
OneEastCommerceDrive
Schaumburg, IL 60173
NOTE: DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters to inches divide by 25.4.
1-800-55-OMRON
OMRON CANADA, INC.
885 Milner Avenue
Scarborough, Ontario M1B 5V8
416-286-6465
9