Omron NX701-1 User Manual

9-47
9 Motion Control Functions
NJ/NX-series CPU Unit Motion Control User’s Manual (W507)
9-5 Common Functions for Single-axis Control
9
9-5-7 Multi-execution of Motion Control Instructions (Buffer Mode)
You can execute another motion control instruction while an axis is moving. In the PLCopen
®
technical
specifications, this functionality is defined as Buffer Mode, but in the MC Function Module this is some-
times referred to as multi-execution of instructions. You can use multi-execution of instructions to exe-
cute multiple motion control instructions in sequence without stopping the overall motion.
The following terms are used in relation to multi-execution of instructions in the MC Function Module.
You can set the BufferMode (Buffer Mode Selection) input variable to motion control instruction to
select one of the following Buffer Modes. The main difference between these modes is the timing at
which the buffered instructions are executed and the transit velocity.
The multi-execution instruction is buffered in the MC Function Module and will be executed at the spec-
ified BufferMode timing and transit velocity for both buffered and blending modes. There is one buffer
for each axis. If aborting is specified, the instruction that was executed last is executed immediately, so
it is not buffered.
Precautions for Correct UsePrecautions for Correct Use
• Only one multi-execution instruction is buffered for each axis. If multi-execution is performed
for two or more instructions, an instruction error will occur.
• Multi-execution of multi-axes coordinated control instructions (axes group instructions) is not
possible for axes operating as a single axis. Similarly, multi-execution of single-axis control
instructions is not possible for axes operating under multi-axes coordinated control (axes
group instructions). An instruction error will occur if these rules are broken.
9-5-7 Multi-execution of Motion Control Instructions (Buffer Mode)
Term
Meaning
This manual PLCopen
®
Current instruction Previous function
block
The motion control instruction that was in operation just before exe-
cuting the multi-execution instruction.
Buffered instruction Next function block A motion control instruction that was executed during an axis motion
and is waiting to be executed.
Transit velocity Blending When blending is specified, it specifies the command velocity to use
by the current instruction to move to the specified target position.
Buffer Mode Description of operation
Aborting The current instruction is aborted and the multi-executed instruction is
executed.
Buffered The buffered instruction is executed after the operation for the current
instruction is normally finished.
Blending The buffered instruction is executed after the target position of the cur-
rent instruction is reached. In this mode, no stop is performed between
the current instruction and the buffered instruction. You can select
from the following transit velocities for when the current instruction
reaches the target position.
Blending Low (low velocity) The transit velocity is set to the target velocity of the current instruction
or the buffered instruction, whichever is lowest.
Blending Previous (previous
velocity)
The target velocity of the current instruction is used as the transit
velocity.
Blending Next (next velocity) The target velocity of the buffered instruction is used as the transit
velocity.
Blending High (high velocity) The transit velocity is set to the target velocity of the current instruction
or the buffered instruction, whichever is highest.

Omron NX701-1 Specifications

General

Ethernet Ports	1
USB Ports	1
Power Supply	24 VDC
I/O Points	Up to 256
Ethernet Port	1
USB Port	1
SD Memory Card Slot	Yes
Programming Language	Ladder Diagram, Structured Text, Function Block Diagram
Operating Temperature	0 to 55°C

Summary

Introduction

Intended Audience

Information about the target readers of this manual.

Applicable Products

Lists the specific CPU Units covered by this manual.

Relevant Manuals

Manual Structure

Special Information

Precaution on Terminology

Sections in this Manual

Terms and Conditions Agreement

Safety Precautions

Definition of Precautionary Information

Explains the classification of precautionary information within the manual.

Precautions for Safe Use

Precautions for Correct Use

Regulations and Standards

Versions

Checking Versions

Explains how to check unit versions using ID information or Sysmac Studio.

Related Manuals

Revision History

1 Introduction to the Motion Control Function Module

1-1 Features

Describes the capabilities of the Motion Control Function Module.

1-2 System Configuration

Outlines the system components and network configuration for motion control.

1-3 Basic Flow of Operation

Provides a step-by{0}step procedure for performing motion control.

1-4 Specifications

Details the performance and general specifications of the MC Function Module.

2 Motion Control Configuration and Principles

2-1 Internal Configuration of the CPU Unit

Overview of the CPU Unit's software configuration and function modules.

2-2 Motion Control Configuration

Details the configuration of motion control on EtherCAT networks and CPU Units.

2-3 Motion Control Principles

Explains CPU Unit tasks and their relation to motion control execution.

2-4 EtherCAT Communications and Motion Control

Describes EtherCAT communications and their relation to motion control.

3 Configuring Axes and Axes Groups

3-1 Axes

Describes the different types of axes used in motion control systems.

3-2 Axis Setting Procedure

Provides step-by-step instructions for setting up axes in Sysmac Studio.

3-3 Axes Groups

Explains how to group axes for complex operations like linear or circular interpolation.

3-4 Setting Procedures for Axes Groups

Details the procedures for setting up axes groups in Sysmac Studio.

4 Checking Wiring from the Sysmac Studio

4-1 Functions of the Sysmac Studio

Explains how to use the MC Test Run function for wiring checks without programming.

4-2 Monitoring Sensor Signals

Describes how to use the input signal display to check sensor wiring.

4-3 Checking Motor Operation

Details how to check motor operation using functions like Servo ON and Jogging.

5 Motion Control Parameters

5-1 Introduction

Explains axis and axes group parameters for motion control operations.

5-2 Axis Parameters

Details various parameters for configuring axis operations.

5-3 Axes Group Parameters

Explains parameters for setting up axes group operations.

6 Motion Control Programming

6-1 Introduction

Explains programming motion control with EtherCAT slave devices.

6-2 Motion Control Instructions

Provides an overview of motion control instructions based on PLCopen® and MC Function Module specific ones.

6-3 State Transitions

Describes the states of axes and axes groups and their transitions.

6-4 Execution and Status of Motion Control Instructions

Details the rules for executing instructions and their status monitoring.

6-5 Positions

Explains the different types of positions used in motion control programming.

6-6 System-defined Variables for Motion Control

Describes system-defined variables for status and parameter information.

6-7 Cam Tables and Cam Data Variables

Explains the creation and handling of cam tables and cam data variables.

6-8 Programming Motion Controls

Provides procedures for creating programs in Sysmac Studio.

6-9 Creating Cam Tables

Explains how to use the Cam Editor in Sysmac Studio to create cam tables.

7 Manual Operation

7-1 Outline

Describes manual operations using the MC Function Module and OMRON Servo Drives.

7-2 Turning ON the Servo

Details how to turn the Servo ON/OFF using the MC_Power instruction.

7-3 Jogging

Explains how to perform axis jogging using the MC_MoveJog instruction.

8 Homing

8-1 Outline

Describes homing operations when combined with OMRON G5-series Servo Drives.

8-2 Homing Procedure

Provides the steps for setting homing parameters and performing the homing operation.

8-3 Homing Operation

Explains how to select the home definition method based on system configuration and purpose.

8-4 Homing with an Absolute Encoder

Describes how to use absolute encoders for homing and retaining position data.

8-5 High-speed Homing

Explains the function for quick positioning to home using MC_MoveZeroPosition.

9 Motion Control Functions

9-1 Single-axis Position Control

Describes positioning operations for single axes connected to OMRON Servo Drives.

9-2 Single-axis Synchronized Control

Explains synchronized control for single axes using gear or cam operations.

9-3 Single-axis Velocity Control

Details the operation of velocity control for single axes.

9-4 Single-axis Torque Control

Explains how torque control continuously applies a specified amount of torque.

9-5 Common Functions for Single-axis Control

Describes common functions like positions, velocity, and acceleration for single-axis control.

9-6 Multi-axes Coordinated Control

Explains how to set up axes groups for interpolation control of multiple axes.

9-7 Common Functions for Multi-axes Coordinated Control

Details common functions for multi-axes coordinated control, like velocity and acceleration.

9-8 Other Functions

Describes additional functions of the MC Function Module.

10 Sample Programming

10-1 Overview of Sample Programming

Provides information applicable to all sample programming sections.

10-2 Basic Programming Samples

Offers programming samples for MC Function Module's basic functions.

11 Troubleshooting

11-1 Overview of Troubleshooting

Describes methods for checking errors and finding corrections.

Appendices

A-1 Connecting the 1S-series Servo Drive

Describes connections and settings for OMRON 1S-series Servo Drives.

A-2 Connecting the G5-series Servo Drive

Describes connections and settings for OMRON G5-series Servo Drives.

A-3 Connecting to Encoder Input Terminals

Details connections and settings for OMRON GX-series Encoder Input Terminals.

A-4 Connecting to NX Units

Provides information on connecting to NX-series Position Interface Units.

A-5 PDS State Transition

Explains PDS state transitions defined in CiA402 drive profile.

A-6 Terminology

Provides definitions of terms related to motion control.

A-7 Version Information

Details functions added or changed for different CPU Unit and Sysmac Studio versions.