Omron NX701-1620 User Manual

Appendix B
B-19
B
NJ/NX-series Database Connection CPU Units User’s Manual (W527)
B-2-4 Ensuring Equipment Performance (Takt
Time) by Monitoring Instruction Execution Timeout
B-2-4 Ensuring Equipment Performance (Takt Time) by Monitoring
Instruction Execution Timeout
If you do not want to lower the equipment performance (or extend the takt time) when the execution
time of DB Connection Instruction is increased, set a timeout for the instructions.
You can specify a timeout in the TimeOut input variable to the DB_Insert, DB_Update, DB_Select, and
DB_Delete instructions.
For the timeout of instructions, specify the maximum time that can be used for DB access in the takt
time.
If you set a timeout for a DB_Insert instruction for the equipment where production data is stored into
the DB using the DB_Insert instruction at the end of the takt time, for example, a DB Connection
Instruction Execution Timeout will occur for the DB_Insert instruction when the record inserting
processing to the DB is not completed in the takt time. In this case, the record inserting processing to
the DB is executed to the end.
You can continue the operation without lowering the equipment performance (or extending the takt
time) by specifying a timeout for the instruction even if execution time of DB Connection Instructions is
temporarily increased.
 When timeout is not specified
Takt time Tt
DB_Insert instruction
The takt time is extended because
execution time of the DB_Insert
instruction is increased.
DB_Insert
instruction
DB_Insert
instruction
DB_Insert instruction
Takt time Tt
Takt time
Tt
Takt time Tt
 When timeout is specified
Takt time Tt
The DB_Insert instruction results in a DB
Connection Instruction Execution Timeout.
The record inserting processing to the DB is
executed to the end.
Timeout
DB_Insert
instruction
DB_Insert
instruction
DB_Insert instruction
DB_Insert
instruction
Precautions for Correct Use
 When a DB Connection Instruction Execution Timeout occurred for a DB_Select instruction,
the values of the retrieved record are not stored in the MapVar in-out variable.
 When a DB Connection Instruction Execution Timeout occurs repeatedly, reconsider the task
design and the server environment that contains the DB.
B-2 Execution Time of DB Connection Instructions

Omron NX701-1620 Specifications

General

Model	NX701-1620
Type	CPU Unit
Power Supply	24 VDC
Programming Software	Sysmac Studio
Operating Temperature	0 to 55°C
Storage Temperature	-25 to 70°C
Series	NX Series
Digital Inputs	Dependent on I/O modules
Digital Outputs	Dependent on I/O modules
Communication Ports	Ethernet
Humidity	10% to 90% (non-condensing)
Shock Resistance	147 m/s², 3 times each in X, Y, and Z directions
Vibration Resistance	10 to 57 Hz, 0.075 mm amplitude; 57 to 150 Hz, 9.8 m/s² acceleration

Summary

Introduction

Intended Audience

Specifies the target audience for this manual, requiring knowledge of electrical systems and FA.

Applicable Products

Lists the specific CPU Unit models and Sysmac Studio versions covered by this manual.

Relevant Manuals

Manual Structure

Page Structure

Details the components of a typical page, including headings, procedures, and icons.

Special Information

Precautions for Safe Use

Outlines precautions to ensure the safe usage of the product.

Precautions for Correct Use

Provides precautions for ensuring proper operation and performance of the product.

Additional Information

Offers extra details to enhance understanding or make operations easier.

Version Information

Details differences in specifications and functionality based on unit and Sysmac Studio versions.

Precaution on Terminology

Defines key terms like "download" and "synchronize" as used in the manual.

Sections in this Manual

Terms and Conditions Agreement

Warranty, Limitations of Liability

Details Omron's warranty terms, limitations, and buyer remedies for product defects.

Limitation on Liability; Etc

Limits Omron's liability for damages related to product use or consequential losses.

Application Considerations

Discusses suitability of use, programmable products, and critical safety considerations for applications.

Disclaimers

Covers performance data, specification changes, and errors/omissions.

Programmable Products

Clarifies Omron's non-responsibility for user programming of programmable products.

Performance Data

Explains that presented performance data is a guide and not a warranty.

Change in Specifications

States that product specifications may change without notice.

Errors and Omissions

Disclaims responsibility for clerical, typographical, or proofreading errors or omissions in the manual.

Safety Precautions

Precautions for Safe Use

Refers to hardware manuals for safety precautions and provides contact information for specific models.

Precautions for Correct Use

Regulations and Standards

Conformance to EU Directives

Details how NJ/NX-series Controllers comply with EU Directives and installation requirements.

Conformance to KC Standards

Provides precautions for using NX-series Units in Korea, noting Class A device registration.

Conformance to Shipbuilding Standards

Explains compliance with shipbuilding standards, including usage conditions for NK and LR standards.

Software Licenses and Copyrights

Informs about third-party software licenses and copyright information availability.

Versions

Unit Versions

Defines unit versions for hardware/software of Units and EtherCAT slaves.

Version Types

Describes the two types of versions: unit version and DB Connection Service version.

Checking Versions

Details methods for checking unit versions using ID information labels and Sysmac Studio.

Unit Versions of CPU Units and Sysmac Studio Versions

Relates supported functions to CPU Unit and Sysmac Studio versions, referring to B-4.

Related Manuals

Terminology

Revision History

Introduction to the DB Connection Service

1-1 Overview and Features

Introduces the DB Connection Service, its overview, and key features.

1-2 DB Connection Service Specifications and System

Details the specifications and system architecture of the DB Connection Service.

1-3 Operation Flow of the DB Connection Service

Outlines the basic operational flow for using the DB Connection Service.