Omron K3NP - 1998 User manual

K3NP Period Meter
Operation Manual
Produced January 1998

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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.
ÓOMRON, 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.

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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 3.......................................................
1-3 Rear of the Meter 6........................................................
1-4 Modes 7.................................................................
1-5 Communications Function 8.................................................
SECTION 2
Setup 9..........................................
2-1 Mounting 10..............................................................
2-2 Input Block 11.............................................................
2-3 Output Board 14...........................................................
SECTION 3
Operating Modes 19................................
3-1 Passing Speed: F1 20........................................................
3-2 Cycle: F2 23..............................................................
3-3 Time Difference: F3 25......................................................
3-4 Elapsed Time: F4 28........................................................
3-5 Length Measurement: F5 31..................................................
3-6 Interval: F6 34.............................................................
SECTION 4
Parameter Setting 37...............................
4-1 Overview 38..............................................................
4-2 Setting Mode 39...........................................................
4-3 Protect Mode 69...........................................................
SECTION 5
Operations in RUN Mode 79.........................
5-1 Displaying and Changing Setting Values 80......................................
5-2 Displaying and Resetting of Maximum and Minimum Values 82.....................
5-3 External Input Signals 84....................................................
SECTION 6
Useful Functions 87.................................
6-1 Teaching Function 88.......................................................
6-2 Output Test 90.............................................................
6-3 Maintenance Mode 91.......................................................
SECTION 7
BCD Output 93....................................
7-1 Connectors 94.............................................................
7-2 Timing Charts 97...........................................................
SECTION 8
Troubleshooting 99.................................
8-1 Items to Be Checked First 100.................................................
8-2 Display 100................................................................

TABLE OF CONTENTS
viii
Appendices
A Specifications 101..............................................................
B List of Settings 105.............................................................
C Available Models 107...........................................................
D Available Parameters 109........................................................
E Setting Examples 113...........................................................
Index 115..........................................
Revision History 119.................................

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About this Manual:
This manual describes the installation and operation of the K3NP Period 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 K3NP.
Section 1 describes the functions of the K3NP. The main components are also described.
Section 2 provides instructions required for mounting and wiring the K3NP.
Section 3 provides instructions for setting the parameters of the K3NP.
Section 4 provides instructions for operating the K3NP 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 K3NP with the BCD Output Board.
Section 7 provides information for troubleshooting the K3NP
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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PRECAUTIONS
This section provides precautions for using the K3NP Period Meter and related devices.
The information contained in this section is important for the safe and reliable application of the K3NP. You must read
this section and understand the information contained before attempting to set up or operate the K3NP.
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
Period Meter
Power
input
Power
input
Signal
input
+++
--
Period Meter
·Countermeasures for protecting the product against inductive noise produced
from the input line.
2-conductor shield wire
+
Period Meter
--

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SECTION 1
Introduction
This section describes the functions of the K3NP. The main components are also described. Refer to the remaining sections of
this manual for the operation of the K3NP and its menus in detail.
1-1 Features 2...............................................................
1-2 Front of the Meter 3.......................................................
1-3 Rear of the Meter 6........................................................
1-4 Modes 7.................................................................
1-5 Communications Function 8.................................................

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1-1 Features
The K3NP Period Meter displays pulse input after performing the numeric con-
version of the input.
The K3NP has the following functions.
Measurement The internal system clock counts the period between pulses or pulse-ON time
and displays it in a variety of modes.
In the following example, the internal system clock counts the time (T) between
pulse INA and pulse INB. If there are 100,000 counts during the time (T), a pass-
ing speed (F1) of 1,200 (m/min) will be displayed according to the following cal-
culation.
T = 1 system clock count (0.5 ms) x 100,000 = 0.05 s
F1 = 1/T x 60 (m/min) according to the internal calculation method.
Therefore, 1/0.05 s x 60 = 1,200 (m/min)
Example: Passing Speed F1
Internal system
clock
Prescaling Input pulses are converted into a value within a specified range.
Comparison output patterns can be selected from the standard, level, or zone
output depending on the application.
Refer to Comparative Output Patterns, page 61.
Refer to Linear Output Range, page 64.
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.
RESET is an external input to reset to the initial state and the present maximum
and minimum values. Resetting can be performed using the front panel keys.
Refer to pages 85 and 86.
Output Test This function is convenient for checking a system to which the K3NP is con-
nected, especially when some inputs cannot be operated. The K3NP simulates
an input to check the output conditions.
Refer to 6-2 Test Mode for details.
Remote/Local Selection The K3NP 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 67.
Comparative Output
Selection
Linear Output
Communications Output
HOLD
RESET
Features Section 1-1

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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 (0 to 99999), seven-segment, 14.2-mm-high LED display with a pro-
grammable decimal point.
The displays show the process value, maximum value, minimum value, opera-
tions/parameters when setting, and error messages.
PV Display K3NP-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.
K3NP-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 setting values. When chang-
ing 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

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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

5
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
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 K3NP to its initial state or to reset the max./min. 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

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1-3 Rear of the Meter
Terminal arrangement varies depending on the selected Output Board.
For wiring, refer to Section 2 Setup.
K3NP with Relay Output Board, K31-C1, -C2, -C5
K3NP with Transistor Output Board, K31-T1, -T2
K3NP with Linear Output Board, K31-L1, -L2, -L3, -L4, -L5, -L6, -L7, -L8, -L9, -L10
K3NP with RS-485 Output Board, K31-FLK2, -FLK5
Output Board
Input Board
K3NP with BCD Output Board, K31-B2, -B4
Output Board
Input Board
K3NP with RS-232C Output Board, K31-FLK1
Communications
Output Board
Input Board
Rear of the Meter Section 1-3

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K3NP with RS-422 Output Board, K31-FLK3
Communications
Output Board
Terminator
Input Board
K3NP with RS232C + Transistor Output Board, K31-FLK4
K3NP 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 K3NP. Power on
Press the Escape and up
Keys for 1 second.
Maintenance mode
RUN mode
1 second
Setting mode
Protect mode
RUN Mode K3NP is in RUN when the K3NP is turned ON.
The K3NP in this mode provides an output signal as a result of the comparison of
the measured and setting values.
Modes Section 1-4

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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 K3NP 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 K3NP 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.
·Forced-zero setting and resetting.
·Confirmation of model data.
Use a model with a 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

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SECTION 2
Setup
This section provides instructions required for mounting and wiring the K3NP.
2-1 Mounting 10..............................................................
2-2 Input Block 11.............................................................
2-2-1 Terminal Arrangement 11.............................................
2-2-2 Wiring Precautions 11................................................
2-2-3 Wiring 12..........................................................
2-3 Output Board 14...........................................................
2-3-1 Terminal Arrangement 14.............................................
2-3-2 Relay Output Board 16...............................................
2-3-3 Transistor and Combination Output Board 17.............................
2-3-4 Linear Output Board 17..............................................
2-3-5 BCD Output Board 17................................................

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2-1 Mounting
Dimensions All dimensions are in millimeters.
14.2 mm
8.2 mm
PV LED Indicator Size
Panel Cutouts
45 +0.8
-- 0
92 +0.8
-- 0
120 min.
75 min.
Recommended panel thickness is 1 to 3.2 mm.
Do not mount more than one Unit closely in the horizontal or vertical direction. Be
sure to keep the distance between adjacent Units.
Mounting Section 2-1