Chapter 3 Function and Performance Specifications

3.3 Performance Specifications

3.3.1 Calculation Specifications

The calculation specifications of the PLC are described below.

Model

Name

 

 

10-point type

 

14-point type

23/28-point type

 

Type

 

 

EH-D10DT

 

EH-D14DT

EH-A23DRP

 

EH-D28DT

 

 

 

 

EH-D10DTP

 

EH-D14DTP

EH-A23DRT

 

EH-D28DTP

 

 

 

 

EH-D10DR

 

EH-A14DR

EH-D23DRP

 

EH-A28DRP

 

 

 

 

 

 

EH-D14DR

 

 

 

EH-A28DRT

 

 

 

 

 

 

EH-A14AS

 

 

 

EH-A28DR

 

 

 

 

 

 

 

 

 

 

EH-D28DRP

 

 

 

 

 

 

 

 

 

 

EH-D28DRT

 

 

 

 

 

 

 

 

 

 

EH-D28DR

 

 

 

 

 

 

 

 

 

 

EH-A28AS

Control

CPU

 

 

 

 

32-bit RISC

processor

 

 

specifications

Processing system

 

 

Stored program cyclic system

 

 

Processing

Basic instructions

 

 

0.9 ∝s / instruction

 

 

speed

Application instructions

 

 

 

 

 

 

 

 

 

 

Several 10 s / instruction

 

 

User program

memory

 

 

3 k steps max. (FLASH memory)

 

Operation

Instruction

Basic instructions

39 types such as LD, LDI, AND, ANI, OR, ORI, ANB, ORB, OUT, MPS,

processing

language

 

 

 

 

MRD, MPP, etc.

 

specifications

 

Arithmetic instructions

62 types (arithmetic, application, control, FUN command etc.)

 

 

Application instructions

 

 

 

 

 

 

 

 

Ladder

Basic instructions

 

 

39 types, such as

 

 

 

 

 

 

 

 

 

 

 

Arithmetic instructions

62 types (arithmetic, application, control, FUN command etc.)

 

 

Application instructions

 

 

 

 

 

 

 

I/O

External

I/O processing system

 

 

Refresh processing

 

processing

I/O

Maximum number of

10 points

 

126 points

135 points

 

 

140 points

specifications

 

points

 

 

 

 

 

 

 

 

 

 

 

Internal

Bit

 

 

1,984 points (R0 to R7BF)

 

 

output

Word

 

 

4,096 words (WR0 to WRFFF)

 

 

 

Special

Bit

 

 

64 points (R7C0 to R7FF)

 

 

 

 

Word

 

 

512 words (WRF000 to WRF1FF)

 

 

 

Bit/word

shared

16,384 points, 1,024 words (M0 to M3FFF, WM0 to WM3FF)

 

Timer

Number of points

 

 

256 points (TD + CU) *1

 

 

counter

Timer set value

0 to 65,535, timer base 0.01 s, 0.1 s, 1 s (0.01s has maximum 64 points *2)

 

 

Counter set value

 

 

1 to 65,535 times

 

 

Edge detection

 

 

512 points (DIF0 to DIF511: Decimal)

 

 

 

 

 

 

+ 512 points (DFN0 to DFN511: Decimal)

 

Peripheral

Program system

 

 

Instruction language, ladder diagram

 

equipment

Peripheral unit

 

 

Programming software

 

 

 

 

 

(LADDER EDITOR DOS version/Windows® version, Pro-H)

 

 

 

 

Instruction language programmer and form graphic display programmer cannot

 

 

 

 

 

 

be used.

 

Maintenance

Self-diagnosis

PLC error (LED display): Microcomputer error, watchdog timer error, memory

functions

 

 

 

error, program error, system ROM/RAM error, scan time monitoring, battery

 

 

 

 

voltage low detection, etc.

 

 

 

 

*1: The same numbers cannot be used with the timer counter.

*2: Only timers numbered 0 to 63 can use 0.01 s for their timer base.

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Hitachi NJI-350B manual Performance Specifications, Calculation Specifications