Omron K3GN User Manual
USER’S MANUAL
1/32 DIN Digital Panel Meter
K3GN
Cat. No. N102-E1-04
PREFACE
This User’s Manual provides you with information necessary
for use of the K3GN series of digital panel meters.
Please read this manual carefully to ensure correct and efficient use of the product.
Keep this manual handy for future reference.
General Precautions
If contemplating using the product in the following environments or for the following equipment,
first contact a sales representative of the company and then accept responsibility for incorporating
into the design fail-safe operation, redundancy, and other appropriate measures for ensuring
reliability and safety of the equipment and the overall system.
(1) Environments deviating from those specified in this manual
(2) Nuclear power control systems, traffic (rail car/automobile/aircraft) control systems, medical
equipment, amusement equipment, and rescue and security equipment
(3) Other equipment that demands high reliability, including those related to the safety of life and
property
About the Contents of the Manual
(1) Any reproduction, full or in part, of the manual is prohibited without prior written
permission from the company.
(2) Specifications in the manual may be subject to change without notice.
(3) Information in the manual has been carefully checked for accuracy. If finding any
suspicious or erroneous descriptions in the manual, however, you are kindly requested
to contact a branch office of the company. In such a case, please let us know the Cat.
No. shown on the front cover of the manual.
I
Other Informations
1 Warranty
(1) Warranty Period
The warranty period for an OMRON Product is one year from either the date of purchase or the date on which the
OMRON Product is delivered to the specified location.
(2) Extent of Warranty
If an OMRON Product is subject to a failure for which OMRON is responsible during the warranty period, either a
replacement product will be provided or the defective product will be repaired free of charge at the place of
purchase, This warranty, however, will not cover problems that occur as a result of any of the following.
a) Using the OMRON Product under conditions or in an environment not described in catalogs or in the
specifications, or not operating the OMRON Product according to the instructions contained in catalogs or
in the specifications.
b) Problems caused by something other than the OMRON Product.
c) Modifications or repairs performed by a party other than OMRON.
d) Using the OMRON Product for other than its designed purpose.
e) Problems that could not have been foreseen with the level of science and technology that existed at the time
the OMRON Product was shipped.
f) Problems caused by an Act of God or other circumstances for which OMRON is not responsible.
This warranty covers only the OMRON Product itself. It does not cover any other damages that may occur
(1) OMRON shall not be responsible for special, indirect, or consequential damages originating in an OMRON
(2) For programmable OMRON Products, OMRON does not accept responsibility for any programming that is
(1) When using OMRON Products in combination with other products, it is use’s responsibility to confirm
(2) When using OMRON Products in any of the following applications, consult an OMRON representative and check
(3) When OMRON Products are used in an application that could pose significant risk to human life or property, the
(4) Application examples provided in catalogs are for reference only. Confirm functionality and safety before actually
(5) To prevent unexpected problems from arising due to the OMRON Product being used incorrectly by the customer
directly as a result of a problem with the OMRON Product.
2 Limitations of Liability
Product.
performed by a party than OMRON, or for any results arising from that programming.
3 Applicable Conditions
the suitability of the OMRON Products for the system, devices, and equipment that are being used. OMRON
accepts no responsibility for the suitability of OMRON Products used in combination with other products.
specifications to allow sufficient leeway in ratings and performance, and to implement suitable safety measures,
such as safety circuits, to minimize danger in the event of an accident.
a) Outdoor applications, applications with potential for chemical contamination or electrical interference, or
application under conditions or environments not described in catalogs.
b) Nuclear control systems, railroad systems, aviation systems, vehicles, combustion systems, medical equipment,
amusement machines, or equipment regulated by government or Industrial standards.
c) Other systems, machines, and equipment that may have a serious influence on human life and property.
d) Equipment requiring a high level of reliability, such as gas, water, or electrical supply systems, and systems that
operate 24 hours a day.
e) Other applications requiring a high level of safety, corresponding to points a) to d), above.
overall system must be designed so that the required safety can be ensured by providing notice of the danger and
incorporating redundancy into the design. Make sure that OMRON Products are appropriately wired and mounted to
serve their intended purpose in the overall system.
using the devices and equipment.
or any other party, make sure that you understand and carefully observe all of the relevant prohibitions and
precautions.
4 Changes to Specifications
Specifications and accessories to the products in catalogs may be changed as needed to improve the products or for any
other reason. Check with your OMRON representative for the actual specifications for OMRON Products at the time
of purchase.
5 Applicability
The above information assumes that business and product application will be conducted in Japan. For business and
application outside of Japan, consult with your OMRON representative.
II
Signal Words and Safety Notices
Signal Words
In this manual, safety notices are divided into WARNING and CAUTION according to the
hazard level.
As both of WARNING and CAUTION notices contain important information for ensuring
safety, be sure to observe them.
Symbols
CAUTION
Indicates a CAUTION or WARNING with the specific contents
indicated in the triangle and described in text. The example at the left is
for a general precaution.
A signal word indicating a potentially hazardous
situation which, if not avoided, may result in minor or
moderate injury or property damage.
Indicates a prohibition with the specific contents described in text,
which is general unless otherwise classified.
Indicates a prohibition with the specific contents indicated behind the
circle and slash and described in text. The example at the left is for
prohibiting disassembling.
Indicates a mandatory action with the specific contents indicated in the
circle and described in text. The example at the left is for a general
mandatory action that is not classified otherwise.
III
p
Safety Notices
CAUTION
Do not touch the terminals while power is being supplied.
Doing so may possibly result in electric shock
Do not allow pieces of metal, wire clippings, or fine metallic shavings or
filings to enter the product.
Doing so may occasionally result in minor or moderate injury or in
property damage due to electric shock, fire, or malfunction caused by
internal short circulation..
Do not use the product in locations where flammable or explosive gases
are present. Doing so may occasionally result in minor or moderate
ex
losion, causing minor or moderate injury, or property damage.
Do not use the equipment for measurements within Measurement
Categories Ⅱ Ⅲ or Ⅳ (according to IEC61010-1). Doing so may
occasionally cause unexpected operation, resulting in minor or moderate
injury, or damage to the equipment. Use the equipment for measurements
only within the Measurement Category for which the product is designed.
Failure to perform correct setting of the product according to the
application may occasionally cause unexpected operation, resulting in
minor or moderate injury, or damage to the equipment.
Ensure safety in the event of product failure by taking safety measures,
such as installing a separate monitoring system.
Ensure safety in the event of product failure by taking safety measures,
such as installing a separate monitoring system.
Product failure may occasionally prevent operation of comparative
outputs, resulting in damage to the connected facilities and equipment.
Tighten the screws on the terminal block and the connector locking
screws securely using a tightening torque within the following ranges.
Loose screws may occasionally cause fire, resulting in minor or moderate
injury, or damage to the equipment.
Terminal block screws : 0.43 to 0.58 N·m.
Connector locking screws :
Do not attempt to disassemble, repair, or modify the product. Doing so
may occasionally result in minor or moderate injury due to electric shock.
IV
Precautions for Safe Use
Precautions for the environment.
(1) Do not use the product in the following locations.
• Locations subject to direct radiant heat from heating equipment
• Locations here the product may come into contact with water or oil
• Locations subject to direct sunlight
• Locations where dust or corrosive gases (in particular, sulfuric or ammonia gas) are
present
• Locations subject to extreme temperature changes
• Locations where icing or condensation may occur
• Locations subject to excessive shocks or vibration
(2) Do not use the product in locations subject to temperatures or humidity levels outside the
specified ranges or in locations prone to condensation. If the product is installed in a
panel, ensure that the temperature around the product (not the temperature around the
panel) does not go outside the specified range. Parts life is dependent on temperatures. A
part life shortens when the temperature rises, and it lengthens when the temperature falls.
Parts life can be lengthened by lowering the temperature inside the product.
(3) In order to prevent inductive noise, wire the lines connected to the product separately
from power lines carrying high voltages or currents. Do not wire in parallel with or in the
same cable as power lines. Other measures for reducing noise include running lines along
separate ducts and using shield lines.
(4) Do not install the product near devices generating strong high-frequency waves or surges.
When using a noise filter, check the voltage and current and install it as close to the
product as possible. If several products are mounted side-by-side or arranged in a vertical
line, the heat dissipation will cause the internal temperature of the product to rise,
shortening the service life. If necessary, cool the products using a fan or other cooling
method.
(5) Take care when cleaning the product, because the exterior of the product contains
organic solvent (thinner, benzine, etc.), strong alkaline material and strong acid material.
(6) Avoid storing in high humidity or in a corrosive gas environment (including during
transportation)
Precautions for Safe Use.
(1) Use and store within the proper temperature and humidity described in the specifications.
(2) Provide sufficient space around the product for heat dissipation.
(3) When using the product stored unused over a year after purchasing, the product features
may not be utilized sufficiently.
(4) Avoid storing outdoors and in a place that receives direct sunlight (including during
transportation).
(5) The service life of the output relays depends on the switching capacity and switching
conditions. Consider the actual application conditions and use the product within the
rated load and electrical service life. Using the product beyond its service life may result
in contact welding or burning.
(6) Be sure to confirm the name and polarity for each terminal before wiring the terminal
block and connectors. Faulty wiring causes destruction or burnout of internal parts.
(7) Use the product within the noted supply voltage and rated load.
(8) Do not connect anything to unused terminals.
(9) Output turns OFF when the mode is changed or settings are initialized. Take this into
consideration when setting up the control system.
V
(10) Install an external switch or circuit breaker and label them clearly so that the operator can
quickly turn OFF the power.
(11) Ensure that the rated voltage is achieved no longer than 2 s after turning the power ON.
When applying a voltage gradually, power supply may not be reset or output functions
indeterminately.
(12) Mount to a panel between 1 and 5 mm thick.
(13) Use the specified size of crimp terminals (M3, width : 5.8 mm max.) for wiring. To
connect bare wires, use AWG 28 to AWG 16 to wire the power supply terminals and
AWG 22 to AWG 14 for other terminals. (Length of exposed wire : 6 to 8 mm)
(14) Allow the product to operate without load for at least 15 minutes after the power is
turned ON.
VI
Precautions for Correct Use
(1) Install the product horizontally. Display error has the risk of becoming larger than the standard because heat
cannot be radiated.
(2) When using a noise filter on the power supply, check that the filter is suitable for the supply voltage and
current ratings, and then attach the noise filter as close as possible to the K3GN.
<Examples of noise prevention schemes>
Line filter
24VDC
Power
supply
input
Digital Panel
Meter
Shielded cable
Digital Panel
Meter
Signal
input
Connect in the direction that
best reduces noise.
(3) If placed near the product, radios, TVs, or other wireless devices may suffer reception interference..
VII
Alphabetic Characters for Setting Data
This manual uses the following alphabetic characters for setting data.
a b c d e f g h i j k l m
A B C D E F G H I J K L M
n o p q r s t u v w x y z
N O P Q R S T U V W X Y Z
VIII
Table of Contents
PREFACE ................................................................................................................I
General Precautions..................................................................................................I
Other Informations ................................................................................................. II
Signal Words and Safety Notices .......................................................................... Ⅲ
Safety Precautions .................................................................................................IV
Installation and Noise Prevention Tips................................................................... V
Alphabetic Characters for Setting Data ................................................................. VI
CHAPTER 1 INTRODUCTION ............................................................. 1
1.1 Main Features.......................................................................................................... 2
1.2 Model Number Legend............................................................................................ 4
1.3 I/O Circuits.............................................................................................................. 5
1.4 Parts Name and Function......................................................................................... 8
CHAPTER 2 INSTALLATION AND CONNECTION.............................. 9
2.1 Installation............................................................................................................. 10
2.2 I/O Terminal Connections ..................................................................................... 12
CHAPTER 3 APPLICATION EXAMPLES........................................... 15
3.1 Monitoring the Remaining Quantity of Soup ........................................................ 16
3.2 Monitoring the Load Current of a Motor............................................................... 18
3.3 Monitoring the Quantity of Dust ........................................................................... 20
3.4 Monitoring the Internal Pressure of a Tank........................................................... 22
3.5 Monitoring the Rotational Speed of a Motor......................................................... 24
3.6 Using the Product as a Digital Indicator for PLC.................................................. 26
CHAPTER 4 INITIAL SETTING.......................................................... 29
4.1 Using the Product as a process meter .................................................................... 30
4.2 Using the Product as a Tachometer ....................................................................... 32
4.3 Using the Product as a Digital Indicator for PLC Data ......................................... 34
CHAPTER 5 OPERATION.................................................................. 37
5.1 Levels .................................................................................................................... 38
5.2 Moving among Levels........................................................................................... 39
5.3 Parameters ............................................................................................................. 42
5.4 Set Values.............................................................................................................. 44
5.5 Operation Level..................................................................................................... 45
5.6 Communication Writing Control........................................................................... 47
IX
5.7 Key Protect Setting ................................................................................................48
5.8 Selecting an Input Type .........................................................................................50
5.9 Selecting an Analog Range....................................................................................51
5.10 Selecting an Input-pulse Frequency Range............................................................52
5.11 Specifying the Scaling Factor for Analog Input/Digital Data Display...................53
5.12 Specifying the Scaling Factor for Input Pulse Frequency...................................... 55
5.13 Specifying the Decimal Point Position ..................................................................58
5.14 Selecting the Output Operating Action..................................................................59
5.15 Performing Linear Output......................................................................................60
5.16 Specifying Communication Parameters.................................................................63
5.17 Clearing All Parameters.........................................................................................65
5.18 Specifying the Number of Measurements for Averaging ......................................66
5.19 Specifying the Function of the Event Input ...........................................................67
5.20 Specifying the Hysteresis.......................................................................................69
5.21 Specifying the Auto-zero Time..............................................................................71
5.22 Specifying the Startup Compensation Time ..........................................................73
5.23 Changing the Display Color...................................................................................75
5.24 Changing the Display Auto-return Time................................................................77
5.25 Changing the Move-to-Protect-Level Time...........................................................79
5.26 Changing the Send Waiting Time..........................................................................81
CHAPTER 6 FUNCTION DESCRIPTION .......................................... 83
6.1 Measurement..........................................................................................................84
6.2 Scaling ................................................................................................................... 86
6.3 Auto-zero/Startup Compensation...........................................................................88
6.4 Average Processing................................................................................................89
6.5 Event Input/Pulse Input..........................................................................................90
6.6 Process Value Hold................................................................................................ 91
6.7 Forced-zero ............................................................................................................ 92
6.8 Comparative Output...............................................................................................93
6.9 Hysteresis............................................................................................................... 94
6.10 Display Color Change............................................................................................ 95
CHAPTER 7 COMMUNICATIONS ..................................................... 97
7.1 Communication Protocols......................................................................................98
7.2 Data Format Structure............................................................................................99
7.3 Structure of Command/Response Text ................................................................101
7.4 Variable Area.......................................................................................................102
7.5 Read from Variable Area ...................................................................................103
7.6 Write to Variable Area ....................................................................................... 104
7.7 Operation Instructions..........................................................................................105
7.8 Setting Areas........................................................................................................ 106
7.9 Commands and Responses...................................................................................107
7.10 Variable Area Map...............................................................................................115
7.11 Communications Control Flow............................................................................ 118
7.12 Programming Example ........................................................................................123
X
CHAPTER 8 USER CALIBRATION.................................................. 127
8.1 User Calibration .................................................................................................. 128
8.2 User Calibration Processes.................................................................................. 130
CHAPTER 9 TROUBLESHOOTING GUIDE .................................... 133
9.1 Error Indications.................................................................................................. 134
9.2 Troubleshooting Table......................................................................................... 135
APPENDIX ...................................................................137
Specifications ............................................................................................ 138
Parameter List............................................................................................ 142
ASCII Code Table...................................................................................... 143
XI
1.1 Main Features
INTRODUCTION
CHAPTER
1 INTRODUCTION
This chapter provides an overview of the product.
1.1 Main Features
1.2 Model Number Legend
1.3 I/O Circuits
Input Circuit Diagrams/Output Circuit Diagrams/
Internal Block Diagram
1.4 Parts Name and Function
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2
4
5
8
1
CHAPTER 1 INTRODUCTION
S
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1.1 Main Features
INTRODUCTION
The K3GN is a digital panel meter that is capable of converting an input signal
into a digital value and displaying it on the main indicator.
The main futures of the product include the following.
Measurement
This feature measures an input signal and displays it as a digital value.
An analog value (voltage/current), a rotational speed (pulses), or digital data
received via communication function can be selected as an input signal.
PLC
PC
Voltage/current
ON/OFF
RS485
OUT1
OUT2
K3GN
SV
ZERO
HOLD
CMW
/ZERO
caling
This feature converts an input signal into a
desired physical value
The figure on the right shows a scaling example
Readout
100kPa
where input signals from a pressure sensor
ranging from 4 to 20 mA are converted into
values ranging from 0 to 100 (kPa). Scaling will
enable you to handle physical quantities easily
and intuitively.
0kPa
4mA
Input
20mA
Comparative
Output
This feature compares a scaled (process) value with a programmed OUT set value
and produces output according to the comparison result.
This is useful in monitoring various systems for malfunction or determining
whether products are within acceptance limits.
OUT1
OUT2
K3GN
SV
/ZERO
ZERO
HOLD
CMW
Three types of comparative outputs are available: those produced at the OUT
upper-limit value, the OUT lower-limit value, and both the OUT values.
OUT upper
limit value
OUT lower
limit value
OUT
lower
limit
value
OUT upper
limit value
Comparative output
Comparative output
produced at the OUT upper
limit value
Comparative output Comparative output
Comparative output
produced at the OUT lower
limit value
Comparative output produced at
the OUT upper and lower limit
values
2
1.1 Main Features
/
INTRODUCTION
Process
Value Hold
Forced-zero
Display Color
Change
This feature enables a process value
to be held while the external event
input stays ON.
Process
value
The outputs are also retained.
HOLD input
This feature shifts a process value to zero, and can be used to evaluate and display
the deviation of a process value from a reference value.
The forced-zero function can be activated by using the
ZERO
key on the front
panel, via the event input terminal, or communications.
Process
value
Forced-zero value
(shifted value)
ZERO input
Measurement value
after executing the
forced-zero function
This feature allows programming of the display color. In the example shown
below, the display color is programmed so that it changes from green to red when
a comparative output turns ON. The display color can also be programmed so that
it changes red to green or is fixed to red or green.
Communi-cation
Red
T
8
OUT1 value
OUT2 value
T
8
1(781
Red
Green
T
8
1*005
1!236
This feature allows the host PC to read process values from the product or
read/write various parameter settings from/to the host PC.
The host PC provides logging of measured data and remote control to the product.
485
232C
T
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8
T
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8
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3
CHAPTER 1 INTRODUCTION
1.2 Model Number Legend
INTRODUCTION
1. Input Type
ND: DC voltage/current, NPN
PD: DC voltage/current, PNP
2. Output Type
C: 2 relay contact outputs (SPST-NO)
C-FLK: 2 relay contact outputs (SPST-NO) and RS-485
C-L1: 2 relay contact outputs (SPST-NO) and DC current (0 to 20 mA, 4 to 20 mA)
C-L2: 2 relay contact outputs (SPST-NO) and DC voltage (0 to 5 V, 1 to 5 V, 0 to 10 V)
T1: 3 transistor outputs (NPN open collector)
T1-FLK: 3 transistor outputs (NPN open collector) and RS-485
T1-L1: 3 transistor outputs (NPN open collector) and DC current (0 to 20 mA, 4 to 20 mA)
T1-L2: 3 transistor outputs (NPN open collector) and DC voltage (0 to 5 V, 1 to 5 V, 0 to 10 V)
T2: 3 transistor outputs (PNP open collector)
T2-FLK: 3 transistor outputs (PNP open collector) and RS-485
3. Option
None: None
-400: Normally energized relays
4. Supply Voltage
24 VDC: 24 VDC
List of Models
voltage
24 VDC
Note: Refer to page 6 for information on models with normally energized relays.
Input type
DC voltage,
DC current,
or NPN
input
DC voltage,
DC current,
or PNP
input
Judgement output Data transmission output
2 relay contact outputs
(SPST-NO)
2 relay contact outputs
(SPST-NO)
Normally energized
relays (See note.)
3 transistor outputs
(NPN open collector)
(SPST-NO)
3 transistor outputs
(PNP open collector)
Output type Supply
None K3GN-NDC 24 VDC
RS-485 K3GN-NDC-FLK 24 VDC
DC current (0 to 20 mA,
4 to 20 mA)
DC voltage (0 to 5 V,
1 to 5 V, 0 to 10 V)
None K3GN-NDC-400 24 VDC
RS-485 K3GN-NDC-FLK-400 24 VDC
DC current (0 to 20 mA,
4 to 20 mA)
DC voltage (0 to 5 V,
1 to 5 V, 0 to 10 V)
None K3GN-NDT1 24 VDC
RS-485 K3GN-NDT1-FLK 24 VDC
DC current (0 to 20 mA,
4 to 20 mA)
DC voltage (0 to 5 V,
1 to 5 V, 0 to 10 V)
None K3GN-PDC 24 VDC 2 relay contact outputs
RS-485 K3GN-PDC-FLK 24 VDC
None K3GN-PDT2 24 VDC
RS-485 K3GN-PDT2-FLK 24 VDC
Model
K3GN-NDC-L1 24 VDC
K3GN-NDC-L2 24 VDC
K3GN-NDC-L1-400 24 VDC
K3GN-NDC-L2-400 24 VDC
K3GN-NDT1-L1 24 VDC
K3GN-NDT1-L2 24 VDC
4
1.3 I/O Circuits
A
A
A
A
Input Circuit Diagrams
Analog Input
1.3 I/O Circuits
INTRODUCTION
Voltage
COM 4 5
Voltage input Current input
Event Input/Pulse Input
1
24VDC+
HOLD/ZERO
Pulse
24VDC-
3
2
NPN input PNP input
B
4.7K
2.35K
-
+
Ω
+B = 1M
Ω
-
D
To To
Ω
Current
6
5
COM
24VDC+
HOLD/ZERO
Pulse
24VDC-
+
Ω
60
1
Ω
2.35K
3
Ω
4.7K
2
D
Output Circuit Diagrams
Contact Output
5V
5V
OUT1
9
11
12
OUT2
COM
5
CHAPTER 1 INTRODUCTION
N
Transistor Output
INTRODUCTION
NPN output PNP output
8.2Ω
8.2Ω
8.2Ω
OUT1
9
PASS
10
OUT2
11
12
COM
8.2Ω
8.2Ω
8.2Ω
COM
12
OUT2
11
PASS
10
9
OUT1
Linear Output
-
-
5KΩ min.
+
7
L
+
500Ω max.
+
7
L
+
8
-
Linear voltage output
Models with Normally Energized
Relays K3GN-NDC-@-400 24 VDC
• The drive operation for the output relay is
reversed in these models.
• Relay contacts can be made open (i.e., OFF)
when comparative set values are being judged.
This is effective when constructing systems that
take failsafe measures into consideration.
List of Models
Models with Normally Energized Relays
K3GN-NDC-400 24 VDC
K3GN-NDC-FLK-400 24 VDC
K3GN-NDC-L1-400 24 VDC
K3GN-NDC-L2-400 24 VDC
8
-
Linear current output
Relation between Output Type and
Relay Output Operation
ote: If Upper/Lower Limit is
selected, the upper limit
and lower limit for the
comparative set value
can be set individually
and will be displayed
for OUT1 and OUT2.
6
Internal Block Diagram
A
A
1.3 I/O Circuits
INTRODUCTION
nalog input
terminal
Event input/
pulse input
terminal
Key
Display
Control
circuit
Input circuit
input
D
convertor
EEPROM
Waveform
recitification
circuit
Microcomputer
Drive circuit
Drive circuit
Drive circuit
Drive circuit
Output
circuit
Output
circuit
Communi-
cation
driver
Constant-voltage
circuit 1
Constant-voltage
circuit 2
Transistor
output
*4
Linear current/
Voltage output
Contact
output
Communi-
cation
terminal
*2
*3
Power supply
circuit
Operation
power supply
*1 Available only for the product with transistor output
*2 Available only for the product with relay output
*3 Available only for the product with communication interface
*4 Available only for the product with linear current/voltage output
7
CHAPTER 1 INTRODUCTION
r
1.4 Parts Name and Function
INTRODUCTION
Level
indicato
Operation
indicator
sections
Operation indicator
section
K3GN
OUT1
OUT2
Name Function
Main indicator Displays a process value, parameter code, or set value.
(Comparative output 1)
(Comparative output 2)
(Forced-zero)
(Process value hold)
(Communication
Level indicator Indicates the current level.
Level key Use to change one level to another.
Mode key Use to select a parameter.
Shift key
Up/Zero key
SV
Level key Mode key Shift key Up/Zero key
OUT1
OUT2
SV
(Set value)
T
(Teaching)
ZERO
HOLD
CMW
writing)
T
8
(((( 8
Is on when comparative output 1 is ON, and off when
comparative output 1 is OFF.
Is on when comparative output 2 is ON, and off when
comparative output 2 is OFF.
Stays on while a set value is displayed or being changed, and off
at all other times.
Stays on while a set value that can be taught is displayed, and
blinks during teaching.
At the calibration level, stays on while a calibration value is
displayed, and blinks while the calibration value is read.
Stays off at all other times.
Is on when zero-shifting by forced-zero operation is active.
Turns off when forced-zero operation is canceled.
Stays on while the process value is held, and off at all other times.
Is on while data reading and writing via communication interface
are both enabled.
Is off while data writing via communication interface is disabled.
Data reading is enabled even if this indicator is off provided that
the product has the communication function.
If the product has no communication function, this indicator is
always off.
Use to check the set value of a parameter or enter the change state
when the parameter is displayed.
Use to select the digit that can be changed while shifting the set
value.
Use to change the set value in the change state.
Use to execute or cancel the forced-zero operation when a process
value is displayed.
Main indicator
Operation indicator
section
ZERO
HOLD
CMW
/ZERO
8
AND
CONNECTION
CHAPTER
1.4 Parts Name and Function
2 INSTALLATION
INSTALLATION
AND CONNECTION
This chapter describes how to install and connect the product
before turning the power on.
2.1 Installation
2.2 I/O Terminal Connections
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Dimensions/Panel Cutout Dimensions/
Installation Procedure
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Terminal Arrangement/Terminal Connection
10
12
9
CHAPTER 2 Installation and Connection
2.1 Installation
Dimensions
INSTALLATION
AND CONNECTION
Size of characters displayed
on the main indicator
8
24
35
7mm
3.6mm
44.8
48
3
(36.8)
80
22
Units in mm
Panel Cutout Dimensions
Separate mounting (units in mm) Gang mounting (units in mm)
60 min.
+0.6
45
40 min.
-0
+0.3
-0
22.2
Fit the product into a rectangular panel cutout, put the adapter on the product from
the rear end all the way to the panel, and tighten the screws of the adapter to
secure the product.
When gang-mounting the products, make sure the ambient temperature of the
product falls within the specified limits.
Mount to a panel that is 1 to 5 mm thick. Mounting the product to a thinner panel
will reduce the resistance to shock and vibration and may result in a malfunction
of the product.
(48 x No. of products -2.5)
The products cannot be made waterproof
when gang-mounted.
+1.0
-0
+0.3
-0
22.2
10
AND
CONNECTION
Installation Procedure
(1) Fit the product into a rectangular panel cutout.
(2) If you want to make the product waterproof, use the watertight packing as
shown in the figure below.
Note that the watertight packing is direction-sensitive.
(3) Put the adapter on the product from the rear end all the way to the panel.
2.1 Installation
INSTALLATION
(4) Tighten the two screws of the adapter in alternate order to a tightening torque
of 0.29 to 0.39 N·m.
11
CHAPTER 2 Installation and Connection
x
x
A
A
A
r
A
A
2.2 I/O Terminal Connections
INSTALLATION
AND CONNECTION
Terminal Arrangement
NC
NC
C
NPN
input
PNP
input
Without
communication
function
With
communication
function
With linear
output
Control voltage
24VDC
Control
voltage
24VDC
1
1
Event input or
pulse input
7
8
RS485
7
8
B (+)
Current/Voltage
7
8
(+)
2
Event input or
pulse input
2
C
(-)
(-)
3
3
7 8 9 10 11 12
1 2 3 4 5 6
Relay
output
D
NPN
tran-
output
D
B
sistor
PNP
tran-
sisto
output
OUT1 OUT2 COM
OUT1 OUT2 COMPAS S
9 10 11 12
OUT1 OUT2 COMPAS S
9 10 11 12
NC
9 10 11 12
4 5 6
nalog
input
B
Vol tag e
COM
Current
nalog input
Terminal No. Name Description Applicable model
-
Operation power supply Operation power supply terminals All models
Depending on parameter setting:
Hold the process value.
•
-
Event input
or
pulse contact/
input
Serve as input terminals for the
•
forced-zero or forced-zero
cancel operation.
Serve as pulse input terminals
•
K3GN-ND_-_ 24VDC
when the input type is set to
"pulse".
-
-
K3GN-PD_-_ 24VDC
Analog input Voltage/current analog terminals All models
Communication RS-485 communication terminals K3GN-_D_-FLK 24VDC
-
Linear current output Linear current output K3GN-___-L1 24VDC
Linear voltage output Linear voltage output K3GN-___-L2 24VDC
11-12
Provide comparative output. K3GN-_DC-_ 24VDC
Provide PASS output in addition
11-12
Comparative output
to OUT1/OUT2 (comparative
output 1/2) when the product is of
K3GN-NDT1-_ 24VDC
K3GN-PDT2-_ 24VDC
transistor output type.
Terminal Connection
Wire the terminals using M3 crimp contacts of the type shown below.
5.8 mm ma
5.8 mm ma
12
AND
CONNECTION
Power Supply
2.2 I/O Terminal Connections
7 8 9 10 11 12
1 2 3 4 5 6
Connect the following power supply to terminals and .
Supply voltage: 24VDC
Operating voltage range: 85 to 110% of the rated voltage
Power consumption: 2.5W (at max. load)
Note that, when turned on, the product will require the operation power supply to
have more power supply capacity than rated.
If multiple products are used, the power supply must be able to afford to supply
power to the products.
Event Input or Pulse Input
7 8 9 10 11 12
1 2 3 4 5 6
NPN input
7 8 9 10 11 12
1 2 3 4 5 6
PNP input
Apply the event or pulse signal to terminals and if the product is of NPN
input type, or terminals
Control power
24VDC
The input equipment connected to these terminals must meet the following
conditions.
Transistor output ON residual current: 2.5V max.
OFF leakage current: 0.1 mA max.
Current leakage with
transistor turned ON: 15 mA min.
Relay output Load current: 5 mA max.
1 2 3
Event or
pulse input
NPN input type
and if the product is of PNP input type.
2
3
Control power
24VDC
1
Event or
pulse input
PNP input type
INSTALLATION
Analog Input
7 8 9 10 11 12
1 2 3 4 5 6
Current input
7 8 9 10 11 12
1 2 3 4 5 6
Voltage input
The following table shows the analog ranges and applicable analog input
terminals.
Analog range Positive side Negative side
4 to 20 mA/0 to 20 mA
1 to 5V/0 to 5V
±5V
±10V
The maximum absolute ratings for analog input are as follows.
Be careful that these ratings must not be exceeded even for a moment.
4 to 20 mA/0 to 20 mA: ±30 mA
1 to 5V/0 to 5V: ±13.5V
±5V: ±13.5V
±10V: ±26V
13
CHAPTER 2 Installation and Connection
t
Communication
7 8 9 10 11 12
1 2 3 4 5 6
Connect the communication cable to terminals and if using the
communication function.
RS-485 connections can be one-to-one or one-to N. A maximum of 32 units
(including the host computer) can be connected in one-to-N systems.
The total length of the communication cables should be up to 500 m.
Use shielded twisted-pair cables (AWG 28 or thicker) as the communication
INSTALLATION
AND CONNECTION
cables.
Be sure to turn ON the terminator switches only in the devices at each end of the
transmission line.
Terminator
120Ω(1/2Ω)
7 8
(B) (A)
K3GN
(No. 1)
7
(B) (A)
K3GN
(No. 2)
RS232C
8
RS232C-RS485
interface convertor
+ -
7 8
(B) (A)
K3GN
(No. 31)
Terminator
120Ω(1/2Ω)
Match the communications format of the K3GN and the host computer. If a
one-to-N system is being used, be sure that the communications formats of all
devices in the system (except individual unit numbers) are the same.
Chapter 7 explains how to set the K3GN communication format. Refer to your
computer's manual for details on changing its communications settings.
Comparative Output
7 8 9 10 11 12
1 2 3 4 5 6
Transistor outpu
7 8 9 10 11 12
1 2 3 4 5 6
Relay output
Comparative output is produced at terminals to 12.
If the product is of relay output type, terminal
Loads connected to the product and the power supply for the loads must be rated
as follows.
The
indicated by the arrows.
Linear Output
7 8 9 10 11 12
1 2 3 4 5 6
Linear currents and voltages are output between terminals 7 to 8. Contact a load
within the specified range.
is not used.
Load
1A
max.
9 10 11 12
OUT1 OUT2 COMNC
1A
Relay output type Transistor output type
max.
Load
30VDC max.
Load
max.
max.
50 mA
50 mA
9 10 11 12
OUT1 OUT2 COMPASS
Load
max.
50 mA
Load
24VDC max.
connection causes the current to flow in the direction opposite to
PNP
14
EXAMPLES
CHAPTER
3 APPLICATION
2.2 I/O Terminal Connections
EXAMPLES
This chapter shows some examples of product applications.
3.1 Monitoring the Remaining Quantity of Soup
3.2 Monitoring the Load Current of a Motor
3.3 Monitoring the Quantity of Dust
3.4 Monitoring the Internal Pressure of a Tank
3.5 Monitoring the Rotational Speed of a Motor
3.6 Using the Product as a Digital Indicator for PLC
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16
18
20
22
24
26
APPLICATION
15
CHAPTER 3 APPLICATION EXAMPLES
g
3.1 Monitoring the Remaining Quantity of Soup
EXAMPLES
APPLICATION
Application
Wirin
100%
20%
4 to 20mA
Remaining
quantity of soup
Replenish
Cup (L)
Cup (M)
Cup (S)
K3GN-NDC
Comparative output 1
(lower-limit action)
Ultrasonic sensor
E4PA-LS50-M1
60mm ~ 500mm
60mm
500mm
• The remaining quantity of soup is monitored.
• The soup level is measured with an ultrasonic displacement sensor.
• The K3GN indicates the remaining quantity of soup on a percentage basis.
• Four measurements are averaged for stable indication.
• Comparative output 1 is produced as a lower-limit action signal. When the
remaining quantity of soup reaches 20% (lower limit), the “Replenish” indicator
turns on.
Comparative output 1
COM
7 8 9 10 11 12
Ultrasonic displacement
sensor
Black
1 2 3 4 5 6
4 to 20mA
Brown (+)
Blue (-)
Operation
power supply
K3GN-NDC
24VDC
COM
Current
input
16
EXAMPLES
g
Parameter Settin
Operation
3.1 Monitoring the Remaining Quantity of Soup
Set the parameters of the K3GN as follows.
Level Parameter Set value
in-t analg
range 4-20
inp.1 4.00
Initial setting
Advanced-function setting
Operation setting
dsp.1 100
inp.2 20.00
dsp.2 0
dp ,,,,,
out1.t lo
avg 4
out1 20
Set the analog output characteristic mode of the sensor to “decrease”. For details
on sensor setting, refer to the Operation Manual for the sensor.
Remaining quantity
of soup
APPLICATION
OUT1 lower
limit value
(20)
Comparative
output 1
• Comparative output 1 turns on when the remaining quantity of soup decreases to
20%.
17
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