OMRON CP1E PLC Practical Selection Guide

OMRON CP1E Series PLC Practical Guide: Full Analysis from Selection to System Integration

In the field of small automation equipment control, the OMRON CP1E series PLC has become the preferred choice for many system integrators and equipment manufacturers due to its economic efficiency, ease of use, and compact design. This series is divided into two sub series: E-type (basic type) and N/NA type (application type), covering I/O configurations from 10 to 60 points, and supporting rich functions such as high-speed counters, pulse outputs, built-in analog signals, and various serial communications. However, facing different model suffixes (S, S1, S @), differences between old and new versions, and rich expansion units, engineers often encounter confusion in selection and system integration. This article is based on the CP1E series product data manual, providing a complete engineering selection and integration guide from model interpretation, hardware specifications, built-in functions, extended configurations to communication interfaces.

Model Naming Rules and Series Positioning

The model naming of the CP1E CPU unit follows the following rules: CP1E - [Type] [I/O Points] [Characteristics] [Power] [Output Type]

1.1 Type classification

Type Description Characteristics

The Economy model only provides basic functions, offers high cost-effectiveness, and has no option board slots

N Application supports program terminal connection, position control, and frequency converter connection, with optional option boards available

NA application type with built-in analog input adds 2 analog inputs and 1 analog output on the basis of N-type

1.2 Comparison of I/O Points and Models

I/O point count, input point count, output point count, corresponding model (taking N-type as an example)

10 6 4 CP1E-E10D□-□

14 8 6 CP1E-N14D□-□

20 12 8 CP1E-N20D□-□

30 18 12 CP1E-N30D□-□

40 24 16 CP1E-N40D□-□

60 36 24 CP1E-N60D□-□

1.3 Suffix Meaning

S: Improved (Renewal). Main changes: No analog regulator (A642/A643 fixed at 0000); The N/NA type built-in RS-232C port only supports SD, RD, RS, CS four wires (does not support DR/ER); Some models have changes in the arrangement of RS-232C terminals.

S1: Only available for N30/40/60S1 models, with built-in RS-232C+RS-485 dual ports.

Power supply: A represents AC power supply (100-240VAC), D represents DC power supply (24VDC).

Output type: R represents relay output, T represents transistor output (sinking), T1 represents transistor output (sourcing).

Selection suggestion: Choose E-type for simple logic control; Need to select N-type for high-speed counting, pulse output, and serial communication; Need to select NA type for analog input and output; RS-485 communication is required to select N □ S1 type.

Performance specification comparison

2.1 Program Capacity and Processing Speed

Model Series Program Capacity Data Memory Basic Instructions LD Special Instructions MOV Batch Processing Time

E-type 2K steps (8K bytes) 2K words 1.19 μ s 7.9 μ s 0.4ms

N/NA type 8K steps (32K bytes) 8K words 1.19 μ s 7.9 μ s 0.4ms

Note: The program capacity already includes the symbol table, comments, and program index for CX Programmer.

2.2 Built in I/O and Expansion Capability

CPU model, built-in I/O expansion unit, maximum number of I/O points

E10/14/20 (S) 10/14/20 does not support the same built-in configuration

E30/40/60 (S) 30/40/60 up to 3 150/160/180

N14/20 14/20 does not support the same built-in configuration

N30/40/60 (S @) 30/40/60 up to 3 150/160/180

NA20 20 20 (including analog quantity) up to 3 140

Expansion I/O units: The CP1W series expansion units include 8/16/32 point input/output units, 20/40 point hybrid I/O units, as well as analog I/O units, temperature sensor units, CompoBus/S I/O link units, etc.

Detailed explanation of built-in high-speed function

The CP1E N/NA CPU unit is equipped with powerful high-speed processing capabilities, suitable for positioning control and high-speed counting applications.

3.1 High speed counter

Description of maximum frequency of input point in counting mode

Incremental pulse input 6 counters 10kHz (E-type)/100kHz (N-type) single-phase counting

Add/subtract pulse input 2 counters 10kHz (E-type)/100kHz (N-type) independent add/subtract pulse

Pulse+direction input 2 counters 10kHz (E-type)/100kHz (N-type) direction signal+pulse

Phase difference input (4th harmonic) 2 counters 5kHz (E-type)/50kHz (N-type) A/B phase signal

Counting mode: Supports linear mode (0 to set maximum value) and circular mode (0 to circular maximum value loop).

Reset method: Supports Z-phase+software reset and pure software reset.

Control method: Supports consistent comparison of target values and regional comparison.

3.2 Pulse output (transistor output type only)

Project specifications

Output points CIO 100.00 and CIO 100.01 (2 channels)

Output mode: Pulse+Direction mode

Frequency range 1Hz~100kHz

Output mode: Continuous mode (speed control), Independent mode (position control)

Relative coordinates of output pulse number: 0~2147483647; Absolute coordinates: -2147483647~2147483647

Acceleration and deceleration curve trapezoidal acceleration and deceleration (S-curve not supported)