YOKOGAWA SMARTDAC+ GX10 User manual

User’s
Manual
IM 04L51B01-06EN
4th Edition
Model GX10/GX20/GP10/GP20/GM10
Log Scale (/LG)
User’s Manual

i
IM 04L51B01-06EN
Introduction
Thank you for purchasing the SMARTDAC+ Series GX10/GX20/GP10/GP20/GM10
(hereafter referred to as the recorder, GX, GP, or GM).
This manual explains the Log scale (/LG option) function of the GX, GP, and GM.
Although the display of GX20 is used in this manual, GX10/GP10/GP20 can be
operated similarly. Moreover, for the GM10, the same content can be displayed on a
Web browser.
To ensure correct use, please read this manual thoroughly before beginning operation.
For details on other settings, procedures, and communication features, read also the
following user’s manuals.
• Model GX10/GX20/GP10/GP20 Paperless Recorder User’s Manual (IM 04L51B01-01EN)
• Data Acquisition System GM User’s Manual (IM 04L55B01-01EN)
• Model GX10/GX20/GP10/GP20/GM10 Communication Command User’s Manual (IM
04L51B01-17EN)
The following manuals are provided for the GX/GP.
• Paper Manuals
Manual Title Manual No. Description
Model GX10/GX20/GP10/GP20
Paperless Recorder
First Step Guide
IM 04L51B01-02EN Explains the basic operations of the GX/GP.
• Downloadable Electronic Manuals
You can download the latest manuals from the following website.
www.smartdacplus.com/manual/en/
Model Manual Title Manual No. Description
GX/GP Model GX10/GX20/GP10/GP20
Paperless Recorder
First Step Guide
IM 04L51B01-02EN This is the electronic version of the paper manual.
Model GX10/GX20/GP10/GP20
Paperless Recorder
User’s Manual
IM 04L51B01-01EN Describes how to use the GX/GP. The communication
control commands and some of the options are excluded.
Model GX10/GX20/GP10/GP20
Advanced Security Function (/AS)
User’s Manual
IM 04L51B01-05EN Describes how to use the advanced security function (/
AS option).
GM GM Data Acquisition System
First Step Guide
IM 04L55B01-02EN This is the electronic version of the paper manual.
GM Data Acquisition System
User’s Manual
IM 04L55B01-01EN Describes how to use the GM. The communication
control commands and some of the options are excluded.
GM Data Acquisition System
Advanced Security Function (/AS)
User’s Manual
IM 04L55B01-05EN Describes how to use the advanced security function (/
AS option).
GX/GP
GM
Model GX10/GX20/GP10/GP20/GM10
Communication Commands
User’s Manual
IM 04L51B01-17EN Describes how to use command control communication
functions.
SMARTDAC+ STANDARD
Universal Viewer
User’s Manual
IM 04L61B01-01EN Describes how to use Universal Viewer, which is a
software that displays GX/GP/GM measurement data
files.
SMARTDAC+ STANDARD
Hardware Configurator
User’s Manual
IM 04L61B01-02EN Describes how to use the PC software for creating setting
parameters for various GX/GP/GM functions.
Model GX10/GX20/GP10/GP20/GM10
Multi-batch Function (/BT)
User’s Manual
IM 04L51B01-03EN Describes how to use the multi-batch function (/BT
option).
Model GX10/GX20/GP10/GP20/GM10
Log Scale (/LG)
User’s Manual
IM 04L51B01-06EN Describes how to use the log scale (/LG option).
Model GX10/GX20/GP10/GP20/GM10
EtherNet/IP Communication (/E1)
User’s Manual
IM 04L51B01-18EN Describes how to use the communication functions
through the EtherNet/IP (/E1 option).
Model GX10/GX20/GP10/GP20/GM10
WT Communication (/E2)
User’s Manual
IM 04L51B01-19EN Describes how to use WT communication (/E2 option).
Model GX10/GX20/GP10/GP20/GM10
OPC-UA Server (/E3)
User’s Manual
IM 04L51B01-20EN Describes how to use the OPC-UA server function (/E3
option).
Model GX10/GX20/GP10/GP20/GM10
SLMP Communication (/E4)
User’s Manual
IM 04L51B01-21EN Describes how to use SLMP communication function (/
E4 option).
Model GX10/GX20/GP10/GP20/GM10
Loop Control Function, Program Control
Function (/PG Option)
User’s Manual
IM 04L51B01-31EN Describes how to use the Loop Control Function,
Program Control Function (/PG Option).
Continued on the next page
4th Edition: May 2020 (YK)
All Rights Reserved, Copyright © 2014, Yokogawa Electric Corporation

ii IM 04L51B01-06EN
Model Manual Title Manual No. Description
GX/GP DXA170
DAQStudio
User’s Manual
IM 04L41B01-62EN Describes how to create custom displays (/CG option).
Notes
• The contents of this manual are subject to change without prior notice as a result of
continuing improvements to the instrument’s performance and functions.
• Every effort has been made in the preparation of this manual to ensure the accuracy of its
contents. However, should you have any questions or find any errors, please contact your
nearest YOKOGAWA dealer.
• Copying or reproducing all or any part of the contents of this manual without the
permission of YOKOGAWA is strictly prohibited.
QR Code
The product has a QR Code pasted for efficient plant maintenance work and asset
information management.
It enables confirming the specifications of purchased products and user’s manuals.
For more details, please refer to the following URL.
https://www.yokogawa.com/qr-code
QR Code is a registered trademark of DENSO WAVE INCORPORATED.
Trademarks
• SMARTDAC+ is registered trademarks of Yokogawa Electric Corporation.
• Microsoft and Windows are registered trademarks or trademarks of Microsoft Corporation
in the United States and/or other countries.
• Adobe and Acrobat are registered trademarks or trademarks of Adobe Systems
Incorporated.
• Company and product names that appear in this manual are registered trademarks or
trademarks of their respective holders.
• The company and product names used in this manual are not accompanied by the
registered trademark or trademark symbols (® and ™).
Using Open Source Software
This product uses open source software.
For details on using open source software, see Regarding the Downloading and Installing
for the Software, Manuals and Labels (IM 04L61B01-11EN).
Revisions
May 2014 1st Edition
December 2014 2nd Edition
June 2017 3rd Edition
May 2020 4th Edition

iii
IM 04L51B01-06EN
Recorder Versions Described in This Manual
The contents of this manual correspond to the GX/GP with release number 4 (see the
STYLE S number) and style number 3 (GX10/GX20/GP10), style number 4 (GP20) (see the
STYLE H number) and the GM10 with release number 4 (see the STYLE S number) and
style number 1 (see the STYLE H number).
Edition Product Explanation
1 GX/GP: Version 2.01 and later —
2 GX/GP: Version 2.01 and later Describes the GM.
GM: Version 2.02 and later
3 GX/GP: Version 4.01 and later Support for Release number 4.
GM: Version 4.01 and later
4 GX/GP: Version 4.08 and later Support for style up (H: 3 (GX10/GX20/GP10), H: 4
(GP20)).
GM: Version 4.07 and later —

iv IM 04L51B01-06EN
Conventions Used in This Manual
Unit
KDenotes 1024. Example: 768K (file size)
kDenotes 1000.
Markings
Improper handling or use can lead to injury to the user or damage to
the instrument. This symbol appears on the instrument to indicate that
the user must refer to the user’s manual for special instructions. The
same symbol appears in the corresponding place in the user’s manual
to identify those instructions. In the manual, the symbol is used in
conjunction with the word “WARNING” or “CAUTION.”
WARNING Calls attention to actions or conditions that could cause serious or fatal
injury to the user, and precautions that can be taken to prevent such
occurrences.
CAUTION Calls attention to actions or conditions that could cause light injury
to the user or cause damage to the instrument or user’s data, and
precautions that can be taken to prevent such occurrences.
Note Calls attention to information that is important for the proper operation
of the instrument.
Reference Item
Reference to related operation or explanation is indicated after this
mark.
Example: section 4.1
Conventions Used in the Procedural Explanations
Bold characters Denotes key or character strings that appear on the screen.
Example: Volt
Aa# 1Indicates the character types that can be used.
a symbol,
uppercase alphabet,
numbers
A
1
lowercase alphabet, #
Procedure Carry out the procedure according to the step numbers. All procedures
are written with inexperienced users in mind; depending on the
operation, not all steps need to be taken.
Explanation gives information such as limitations related the procedure.
Explanation
Path Indicates the setup screen and explains the settings.
Description
Module Notation
When necessary, the following notations are used to distinguish the GX90XA analog input
modules by type.
Type Suffix Code Notation
-U2 Universal
-C1 Current (mA)
-L1 Low withstand voltage relay
-T1 Electromagnetic relay
-H0 High-speed universal or High speed AI
-R1 4-wire RTD/resistance

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IM 04L51B01-06EN
Contents
Introduction................................................................................................................................................ i
Recorder Versions Described in This Manual ..........................................................................................iii
Conventions Used in This Manual........................................................................................................... iv
Using the Log scale Function ............................................................................................................. 1
Log Scale Display Function...................................................................................................................... 1
Restrictions............................................................................................................................................... 2
Setting the Log scale ........................................................................................................................... 3
AI channel settings ................................................................................................................................... 3
Setup Examples ..................................................................................................................................... 13

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IM 04L51B01-06EN
Using the Log scale Function
Log Scale Display Function
You can apply a logarithmic voltage that has been converted from a physical value to the
recorder, and then use the log scale (logarithmic scale) to display and record the physical
value. The recorder supports three types of input signals.
• Logarithmic Input
This is referred to as “Log input”. Log input is input in which the voltage corresponds to
logarithmic values of physical values.
• Pseudo Log Input
This is referred to as “Pseud-log input.” This input supports pseudo logs.
A pseudo log signal is a voltage obtained by summing the one’s digit of the voltage
representing the exponent of the logarithmic data and the decimal digits of the voltage
representing the mantissa.
• Input That Is Linear on a Logarithmic Scale
This is referred to as “Linear-Log input.” Linear log input is input in which the voltage
values correspond to the logarithmic values of physical values at each decade division
(for example, 1 × 102) and in which, within each decade, the voltage values correspond
linearly to physical values.
On the trend display, the recorder displays waveforms with the log scale. Digital values are
displayed as exponents (for example, 1.2E+03).
Display example on the GX/GP main unit
Trend display example on a Web application (GM)
Log scale
Digital value
Log scale

2IM 04L51B01-06EN
Restrictions
Partial
You cannot set the partial display on a channel that is set to log scale.
Differential Computation between Channels
If you set the reference channel of a differential computation between channels to a channel
that is set to log scale, an error will be returned as the measured result of the differential
computation between channels.
Computation Channels (/MT option)
Do not include channels that are set to log scale in a computation channel expression.
If you include these channels, an error will be returned as the measured result.
Report Function (/MT option)
You cannot create reports for channels that are set to log scale. An error will be returned as
the result of report computations on channels that are set to log scale.
Manual Sampled Data
For channels that are set to log scale, the data is stored using the “mantissa + exponent”
format, the same format as that of digital values on the recorder.
Number of Channels Set to Log Scale
Keep the number of channels set to log scale no greater than 300.
When there are many channels set to log scale, log scale processing may not finish within
the scan interval and may cause computation data dropouts.
Using the Log scale Function