Omron K3NR User manual

Cat. No. N093-E1-1A
Frequency/Rate Meter
K3NR

K3NR Frequency/Rate Meter
Operation Manual
Revised February 2001

iv

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Notice:
OMRON products are manufactured for use according to proper procedures by a qualified operator
and only for the purposes described in this manual.
The following conventions are used to indicate and classify precautions in this manual. Always heed
the information provided with them. Failure to heed precautions can result in injury to people or dam-
age to the product.
DANGER Indicates information that, if not heeded, is likely to result in loss of life or serious injury.
WARNING Indicates information that, if not heeded, could possibly result in loss of life or serious injury.
Caution Indicates information that, if not heeded, could result in relatively serious or minor injury, dam-
age to the product, or faulty operation.
OMRON Product References
All OMRON products are capitalized in this manual. The word “Unit” is also capitalized when it refers
to an OMRON product, regardless of whether or not it appears in the proper name of the product.
The abbreviation “Ch,” which appears in some displays and on some OMRON products, often means
“word” and is abbreviated “Wd” in documentation in this sense.
The abbreviation “PC” means Programmable Controller and is not used as an abbreviation for any-
thing else.
Visual Aids
The following headings appear in the left column of the manual to help you locate different types of
information.
Note Indicates information of particular interest for efficient and convenient operation
of the product.
1, 2, 3... 1. Indicates lists of one sort or another, such as procedures, checklists, etc.
OMRON, 1998
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any
form, or by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permis-
sion of OMRON.
No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is
constantly striving to improve its high-quality products, the information contained in this manual is subject to change
without notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no
responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the informa-
tion contained in this publication.

vi

TABLE OF CONTENTS
vii
PRECAUTIONS xi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 General Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Safety Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Application Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Noise Prevention xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 1
Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1 Features 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 Front of the Meter 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 Rear of the Meter 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 Modes 8.................................................................
1-5 Communications Function 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 2
Setup 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1 Mounting 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 Input Block 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3 Output Board 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 3
Operating Modes 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1 Rotational/Circumferential Speed: F1 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2 Absolute Ratio: F2 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3 Error Ratio: F3 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-4 Rotational Difference: F4 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-5 Flow Rate Ratio: F5 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-6 Passing Time: F6 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-7 Pulse Counting: F7 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 4
Parameter Setting 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1 Overview 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2 Setting Mode 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-3 Protect Mode 88. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 5
Operations in RUN Mode 99. . . . . . . . . . . . . . . . . . . . . . . . .
5-1 Displaying and Changing Setting Values 100. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-2 Displaying and Resetting of Maximum and Minimum Values
(Operating Modes F1 to F6) 103. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-3 External Input Signals 104. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 6
Useful Functions 107. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-1 Teaching Function 108. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-2 Output Test 112. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-3 Maintenance Mode 113. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE OF CONTENTS
viii
SECTION 7
BCD Output 115. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-1 Connectors 116. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7-2 Timing Charts 119. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 8
Troubleshooting 121. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-1 Items to Be Checked First 122. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8-2 Display 122. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendices
A Specifications 125. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B Estimated Frequency Calculation 129. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C List of Settings 131. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D Available Models 133. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E Available Parameters 135. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F Setting Examples 139. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index 141. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision History 145. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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About this Manual:
This manual describes the installation and operation of the K3NR Frequency/Rate Meter and includes the
sections described below.
Please read this manual carefully and be sure you understand the information provided before attempting
to install and operate the K3NR.
Section 1 describes the functions of the K3NR. The main components are also described.
Section 2 provides instructions required for mounting and wiring the K3NR.
Section 3 provides instructions for setting the parameters of the K3NR.
Section 4 provides instructions for operating the K3NR in RUN mode.
Section 5 provides information on the teaching function, output test, and maintenance mode.
Section 6 provides information on the use of the K3NR with the BCD Output Board.
Section 7 provides information for troubleshooting the K3NR
The Appendices provide specifications, a list of settings, a list of standard models, and a list of available
menu items.
WARNING Failure to read and understand the information provided in this manual may result in
personal injury or death, damage to the product, or product failure. Please read each
section in its entirety and be sure you understand the information provided in the section
and related sections before attempting any of the procedures or operations given.
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xi
PRECAUTIONS
This section provides precautions for using the K3NR Frequency/Rate Meter and related devices.
The information contained in this section is important for the safe and reliable application of the K3NR. You must read
this section and understand the information contained before attempting to set up or operate the K3NR.
1 General Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Safety Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Application Precautions xii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Noise Prevention xiii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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3SectionApplication Precautions
xii
1 General Precautions
The user must operate the product according to the performance specifications
described in the operation manuals.
Before using the product under conditions which are not described in the manual
or applying the product to nuclear control systems, railroad systems, aviation
systems, vehicles, combustion systems, medical equipment, amusement ma-
chines, safety equipment, and other systems, machines, and equipment that
may have a serious influence on lives and property if used improperly, consult
your OMRON representative.
Be sure to read this manual before attempting to use the product and keep this
manual close at hand for reference during operation.
2 Safety Precautions
WARNING Never attempt to disassemble any Units while power is being supplied. Doing so
may result in serious electrical shock or electrocution.
WARNING Never touch any of the terminals while power is being supplied. Doing so may
result in serious electrical shock or electrocution.
3 Application Precautions
Observe the following precautions when using the product.
•Always use the power supply voltage specified in the specifications.
•Do not use the product in locations subject to flammable gases or combustible
objects.
•Be sure to confirm terminal names when wiring.
•Be sure to tighten the screws on the terminal blocks.
Observe the following precautions when mounting the product.
•Mount the product on level surfaces.
•Mount the product on a panel which has a thickness of 1 to 3.2 mm.
Do not mount the product in the following places.
•Locations subject to strong shock or vibration.
•Locations subject to temperature or humidity exceeding the rated levels or
where icing is liable to occur.
•Locations subject to dust.
•Locations subject to corrosive gases (particularly sulfuric gases or ammonium
gases).
•Locations subject to direct sunlight or outdoor conditions.
•Locations near devices (high-frequency welders or high-frequency sewing
machines) that produce high-frequency noise.

4SectionNoise Prevention
xiii
4 Noise Prevention
Provide the following countermeasures when using the product in an environ-
ment where the product is exposed to noise.
•Countermeasures for protecting the product against high-frequency noise or
abnormal voltages.
Line filter
Frequency/Rate
Meter
Power
input
Power
input
Signal
input
+++
–
Frequency/Rate
Meter
•Countermeasures for protecting the product against inductive noise produced
from the input line.
2-conductor shield wire
+
Frequency/Rate
Meter
–

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SECTION 1
Introduction
This section describes the functions of the K3NR. The main components are also described. Refer to the remaining sections of
this manual for the operation of the K3NR and its menus in detail.
1-1 Features 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 Front of the Meter 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 Rear of the Meter 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 Modes 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5 Communications Function 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2
1-1 Features
The K3NR Frequency/Rate Meter displays desired values after converting input
pulses.
The K3NR has the following functions.
Operating mode Function
1Displays rotational or circumferential speed of a single input.
2 to 5 Displays the calculation results of two rotational inputs.
6Displays passing time calculated from the frequency and process length of a single input.
7Counts and displays the number of pulses.
Measurement The internal system clock counts the ON/OFF time (T) of sensor input or other
input and automatically calculates the frequency. The number of revolutions is
calculated from the result of the frequency multiplied by 60.
Sensor input pulse ON/OFF time (T) =
Frequency (f) = T
1
•Rotational speed (rpm) = f x 60
•Circumferential speed = Circumference x revolutions
•Passing time = Length of processing/Circumferential speed
•Pulse counting
If there is any pulse input, the input will be automatically converted numerically
and displayed.
Prescaling The number of input pulses is converted into a desired value.
Enables the K3NR to display the revolutions or rotational speed. It is necessary
to multiply the number of pulses per revolution or circumference by a certain fac-
tor. This factor is called the prescaling value.
Example:
Proximity Sensor
K3NR
rpm = f x 60 x a
f: Input pulse frequency (number of pulses per second)
a: Prescale value
If there are five pulses per rotation, the accurate rotational
speed can be calculated if a = 1/5 (– 0.2=2 x 10–1).
Comparison output patterns can be selected from the standard, level, or zone
output depending on the application.
Refer to Comparative Output Patterns, page 80.
Refer to Linear Output Range,page 83.
BCD Output A digital data output format where every four binary bits is numerically equivalent
to one decimal digit.
Refer to Section 7 BCD Output.
Refer to the Communications Manual.
HOLD is an external input which is used to stop the A/D process and freeze the
display. The comparative, linear, and BCD outputs are also retained.
Refer to 5-3 External Input Signals for details.
Comparative Output
Selection
Linear Output
Communications Output
HOLD
Features Section 1-1

3
RESET is an external input to reset the present max./min. values and counting
values. The process value when the RESET is ON is set as the maximum and
minimum values. The counting value is reset to zero. The max./min. values and
counting values can be reset using the front panel keys.
Refer to pages 104 and 105.
Teaching The K3NR is provided with a teaching function that can set an actual measured
value as a setting value without key input.
This function is useful for setting parameters while checking the operating status
of the K3NR.
The teaching function can be used to set the set and prescaling values. It can be
also used to set the linear output range of the K3NR with a Linear Output Board.
Refer to 6-1 Teaching Function for details.
Output Test This function is convenient for checking a system to which the K3NR is con-
nected, especially when some inputs cannot be operated. The K3NR simulates
an input to check the output conditions.
Refer to 6-2 Output test for details.
Hysteresis The established setting value includes a hysteresis setting to prevent “chatter-
ing” of the output when the measured value fluctuates in the vicinity of the setting
values.
Hysteresis is enabled when the measured value is starts to become smaller than
the HH and H setting values and larger than the LL and L setting values.
Refer to Hysteresis, page 78.
Startup Compensation Time The startup compensation time parameter keeps the measurement operation
from sending an unnecessary output corresponding to instantaneous, fluctuat-
ing input from the moment the K3NR is turned ON until the end of the preset peri-
od.
Refer to Startup Compensation Time, page 74.
Remote/Local Selection The K3NR can be operated remotely through a host computer or locally with key
inputs.
Remote Mode: For programming remotely by downloading setup parameters
from a host computer via RS-232C, RS-485, or RS-422.
Local Mode: Programming is performed with the front panel key input.
Refer to Remote/Local Programming, page 86.
Setting process time for averaging measured value prevents the display from
fluctuating due to unstable input.
Refer to Process Time for Averaging Measured Value, page 72.
Auto-Zero Time The input pulse frequency does not drop to zero perfectly due to the estimated
frequency calculation of the K3NR. Therefore, the K3NR has a function to cali-
brate the frequency to zero forcibly should no input pulse be received for a cer-
tain period. The period during which no pulse is received before the K3TR sets
the frequency to zero is called “auto-zero time.”
Refer to page 62.
RESET
Process Time for Averaging
Measured Value
Features Section 1-1

4
1-2 Front of the Meter
Comparative output
status indicators PV display
Mode Key
Status indicators
SV display status
indicators
Teaching indicator
Unit of measure
SV display
Shift Key
Escape Key
Up Key
RESET/TEACH Key
Five-digit (–19999 to 99999), seven-segment, 14.2-mm-high LED display with a
programmable decimal point.
The displays show the process value, maximum value, minimum value, opera-
tions/parameters when setting, and error messages.
PV Display K3NR-jjjA Basic Model
RUN Mode: Displays the process, maximum, and minimum values. Also
displays setting values while the SV indicator is lit. When
changing a value, all digits other than those that can be set be-
come dimmer.
Setting Mode: Displays the menu, parameter, or setting value. When chang-
ing a value, all digits other than those that can be set become
dimmer.
K3NR-jjjC Set Value LED Display Model
RUN Mode: Displays the process, maximum, and minimum values.
Setting Mode: Displays the menu and parameters.
RUN Mode: Displays comparative set values. When changing a value, all
digits other than those that can be set become dimmer.
Setting Mode: Displays setting values. When changing a value, all digits other
than those that can be set become dimmer.
Indicates the status of the comparative output.
SV Display (Setting value
LED Display Models Only)
Comparative Output Status
Indicators
Front of the Meter Section 1-2

5
Status Indicators HOLD Indicator
Lit when the HOLD input signal is ON.
MAX Indicator
Lit when the value displayed on the PV display is the maximum value.
MIN Indicator
Lit when the value displayed on the PV display is the minimum value.
PROG Indicator
Lit when the setting mode menu is displayed. The indicator flashes while param-
eters are displayed.
Teaching Indicator Lit when displayed parameters can be set in teaching operation. The indicator
flashes when the process value is indicated as a setting value.
SV Display Status Indicators Indicates which set value is on the PV or SV display.
Unit of Measure Attach the appropriate label showing the unit of measure (enclosed).
Used to select the process, maximum, or minimum value to be displayed on the
PV display in RUN mode.
Process value Maximum value Minimum value
ESC ESC
Used to return from the setting, protect, or maintenance mode to the RUN mode.
This key is also used to return to the previous operation during the setting, pro-
tect, or maintenance mode.
Displays a setting value (out of HH, H, L, and LL setting values in this order) on
the PV display in RUN mode when this key is pressed. Unless another operation
key is pressed within five seconds after this key has been pressed, the display
automatically changes to the one for process values.
Process value
Maximum value
Minimum value
HH is lit.
HH setting
value
H setting
value
L setting
value
LL setting
value
H is lit. L is lit. LL is lit.
No key input
for 5 seconds.
No key input
for 5 seconds.
No key input
for 5 seconds.
No key input
for 5 seconds.
In the RUN mode, this button terminates the measurement process and allows
you to enter the setting mode, advancing through the menus and parameters.
Menu 1 Menu 2 Menu n
Parameter 1 Parameter 2 Parameter n
In the setting mode, this button will store changes in the non-volatile memory
while at the same time advancing the display to the next menu item.
Escape Key
Mode Key
Front of the Meter Section 1-2

6
Used to select a parameter to be displayed for setting value change.
Used to increment the current digit in the setting value by one.
The value increases in the following order:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, (–1), and (–)
Only the leftmost digit will be displayed if the value is set to “–1” or“ –.”
The value will be set to 0 if this key is pressed when “9” or “–” is displayed.
Used to change the parameter displayed in setting mode.
Used to scroll the digit to the right of the presently displayed digit.
Used to reset the maximum value, minimum value, or counting value in RUN
mode.
Used to select the teaching function. Refer to 6-1 Teaching Function for details.
Up Key
Shift Key
RESET/TEACH Key
Front of the Meter Section 1-2

7
1-3 Rear of the Meter
Terminal arrangement varies depending on the selected Output Board.
For wiring, refer to Section 2 Setup.
K3NR with Relay Output Board, K31-C1, -C2, -C5
K3NR with Transistor Output Board, K31-T1, -T2
K3NR with Linear Output Board, K31-L1, -L2, -L3, -L4, -L5, -L6, -L7, -L8, -L9, -L10
K3NR with RS-485 Output Board, K31-FLK2, -FLK5
Output Board
Input Board
K3NR with BCD Output Board, K31-B2, -B4
Output Board
Input Board
K3NR with RS-232C Output Board, K31-FLK1
Communications
Output Board
Input Board
Rear of the Meter Section 1-3

8
K3NR with RS-422 Output Board, K31-FLK3
Communications
Output Board
Terminator
Input Board
K3NR with RS232C + Transistor Output Board, K31-FLK4
K3NR with RS-422 + Transistor Output Board, K31-FLK6
Communications
Output Board
Terminator
Input Board
Transistor
Output Board
1-4 Modes
The following four modes are available.
•RUN mode for normal operations (see Section 5 Operations in RUN Mode)
•Setting mode for initializing parameter input (see Section 4 Parameter Setting)
•Protect mode for lock-out configuration (see 4-1 Protect Mode)
•Maintenance mode for initialization (see 6-3-2 Initialization)
Refer to the following for the relationship among these modes and selection of
the modes.
RUN mode
Press the Mode and Shift Keys
while turning on the K3NR. Power on
Press the Escape and up
Keys for 1 second.
Maintenance mode
RUN mode
1 second
Setting mode
Protect mode
RUN Mode K3NR is in RUN when the K3NR is turned ON.
The K3NR in this mode provides an output signal as a result of the comparison of
the measured and setting values.
Modes Section 1-4

9
The basic model in this mode usually displays the process value. The maximum
and minimum values are displayed by pressing the Escape Key. The parame-
ters and setting values are displayed by pressing the Mode Key.
Refer to Section 5 Operations in RUN Mode for RUN mode in detail.
Setting Mode Values are set in the K3NR in this mode by key input or using the teaching func-
tion.
Refer to Section 4 Parameter Setting for value setting by key input and 6-1
Teaching Function for the teaching function in detail.
Protect Mode Use this mode to prohibit some operations in order to lock out the setting values.
Refer to 4-1 Protect Mode for details.
Maintenance Mode The setting values are reset to factory-set values in this mode. Refer to 6-3-2
Initialization for details.
1-5 Communications Function
The communications function of the K3NR makes it possible for the host com-
puter to perform the following operations.
•Confirmation and change of setting values. Communications conditions can-
not be changed.
•Reading and resetting the maximum and minimum values.
•Confirmation of model data.
Use a model with the Communications Board if the communications function is
required.
Refer to the Communications Manual for the communications function in detail.
RS-232C Use the K31-FLK1 or K31-FLK4 Output Board to use the RS-232C interface.
RS-422 Use the K31-FLK3 or K31-FLK6 Output Board to use the RS-422 interface.
RS-485 Use the K31-FLK2 or K31-FLK5 Output Board to use the RS-485 interface.
Communications Function Section 1-5