Omron CJ1M-CPU21 User Manual

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Built-in Inputs Section 6-1
Specifications
Interrupt Task Numbers
6-1-4 High-speed Counter Inputs
Overview
This function counts pulse signals input at the built-in input terminals.
Any one of the following input signals can be selected as the counter input
mode.
• Differential phase inputs (4x)
• Pulse + direction inputs
• Up/Down pulse inputs
• Increment pulse inputs
The present counts are contained in the High-speed Counter PVs (A270 to
A273.)
• The counting mode can be set to linear mode or ring mode counting.
• The counter reset method can be set to Phase-Z signal + Software reset
or Software reset.
• An interrupt task can be started when the high-speed counter PV meets
the preset comparison condition. Either one of these comparison meth-
ods can be used:
• Target value comparison
• Range comparison
• Counting can be stopped temporarily with the counters Gate Bit (Gate
function.)
Item Specifications
Number of inputs 4 inputs (The 4 input terminals are shared with the
quick-response inputs, high-speed counter (Phase-Z
signal), and general-purpose inputs.)
Allocated data area CIO 2960 bits 00 to 03
Count pulse detection Up differentiation or down differentiation
Count method Incrementing or decrementing (Set with the
MSKS(690) instruction.)
Count range 0001 to FFFF hex (16 bits)
(The SVs are set in Auxiliary Area words A532 to
A535.)
Response frequency Single phase: 1 kHz x 4 inputs
Storage priority for the inter-
rupt input (counter mode) PVs
A536 to A539
•PVs can be read with the PRV(881) instruction.
•PVs can be changed with the INI(880) instruction.
Note
•PVs are retained when the power is turned ON.
•PVs are cleared when operation starts.
•PVs are refreshed when a interrupt occurs.
•PVs are refreshed when the INI(880) instruction is
executed to change the PV.
Input bit Interrupt task number
CIO 2960 bit 00 140
CIO 2960 bit 01 141
CIO 2960 bit 02 142
CIO 2960 bit 03 143

Omron CJ1M-CPU21 Specifications

General

CPU Type	CJ1M
Model Number	CJ1M-CPU21
Data Memory Capacity	32K words
Operating Voltage	24 VDC
Operating Temperature	0 to 55 °C
Execution Speed	0.1 μs (basic instructions)
Serial Communication	RS-232C
Expansion Capability	Up to 3 expansion units
Programming Language	Ladder logic, structured text
Built-in I/O Points	No built-in I/O

Summary

PRECAUTIONS

1 Intended Audience

Identifies target personnel for the manual, requiring knowledge of electrical and FA systems.

2 General Precautions

Emphasizes operating products as specified and consulting OMRON for critical applications.

3 Safety Precautions

Crucial warnings about PLC operation, memory modification, and handling electrical components to prevent injury.

4 Operating Environment Precautions

Guidelines on avoiding hazardous locations like direct sunlight, extreme temperatures, or corrosive environments.

5 Application Precautions

Precautions for system setup, grounding, power supply handling, and component mounting during operation.

6 Conformance to EC Directives

Details on compliance with EMC and Low Voltage Directives for safe system integration.

SECTION 1 Features

1-1 Features

Overview of CJ1M CPU Units' high-speed, advanced, micro-sized PLCs with built-in I/O.

1-2 Version Upgrades for CJ1M CPU Units

Details on functional improvements from unit version upgrades for CJ1M CPU Units.

1-3 Functions Listed by Purpose

Categorization of built-in I/O functions based on their specific purpose.

SECTION 2 Overview

2-1 Allocations for Built-in CPU Unit Inputs

Mapping of physical inputs to internal addresses and their functional assignments.

2-2 Allocations for Built-in CPU Unit Outputs

Mapping of physical outputs to internal addresses and their functional assignments.

2-3 Allocations for Origin Search Function

Details on I/O points utilized by the origin search function for pulse outputs.

SECTION 3 I/O Specifications and Wiring

3-1 I/O Specifications

Electrical and functional specifications for built-in inputs and outputs, including voltage and current ratings.

3-2 Wiring

Information on connector pin allocations and wiring methods for system connections.

3-3 Wiring Examples

Practical illustrations of various I/O connection configurations for different devices.

SECTION 4 Data Area Allocation and PLC Setup Settings

4-1 Data Area Allocation for Built-in I/O

Allocation of memory words and bits for built-in I/O usage.

4-2 PLC Setup Settings

Configuration parameters within the PLC for managing built-in I/O functionality.

4-3 Auxiliary Area Data Allocation

Allocation of auxiliary area words and bits related to built-in inputs and outputs.

4-4 Flag Operations during Pulse Output

Explanation of how flags change relative to pulse output operations and timing.

SECTION 5 High-speed Counter/Pulse Output Instructions

5-1 MODE CONTROL: INI(880)

Controls operations for high-speed counters and pulse outputs, including starting/stopping and PV changes.

5-2 HIGH-SPEED COUNTER PV READ: PRV(881)

Reads Present Values (PVs) and status information for high-speed counters and pulse outputs.

5-3 COUNTER FREQUENCY CONVERT: PRV2(883)

Converts pulse frequency to rotational speed or total revolutions.

5-4 REGISTER COMPARISON TABLE: CTBL(882)

Registers comparison tables and performs target or range comparisons for high-speed counter PVs.

5-5 SPEED OUTPUT: SPED(885)

Sets output pulse frequency and starts pulse output without acceleration/deceleration.

5-6 SET PULSES: PULS(886)

Sets the number of output pulses for SPED(885) or ACC(888) in independent mode.

5-7 PULSE OUTPUT: PLS2(887)

Outputs specified pulses with acceleration/deceleration, supporting target changes.

5-8 ACCELERATION CONTROL: ACC(888)

Outputs pulses with specified acceleration/deceleration rates, supporting mode changes.

5-9 ORIGIN SEARCH: ORG(889)

Performs origin search or origin return operations using specified methods and parameters.

5-10 PULSE WITH VARIABLE DUTY FACTOR: PWM(891)

Generates PWM pulse outputs with a specified duty factor and frequency.

SECTION 6 Built-in I/O Function Descriptions

6-1 Built-in Inputs

Detailed description of the types, allocations, and specifications of built-in inputs.

6-2 Built-in Outputs

Detailed description of the types, allocations, and specifications of built-in outputs.

6-3 Origin Search and Origin Return Functions

Detailed explanation of origin search and return operations and their parameters.

SECTION 7 Programming Examples

7-1 Built-in Outputs

Practical examples illustrating the programming of built-in output functions.