Hitachi PLC User manual

No. Contents Page

1Introduction 2

2Hitachi PLC 4

3Technical Specifications 10

4Setting up 11

5Configuration 13

6Wiring 16

7Programming 17

Getting Started

Hitachi PLC

Powerful Hitachi PLC

Programming Compatibility

Programming is fully compatible from the smallest PLC (MICRO-EH) to the biggest one (Big-H

series).

2 communication ports

2 communication ports can be used flexibly as programming, HMI communication and general

purpose port for bar code reader or intelligent sensors or scales.

(Note : MICRO-EH does not support the general purpose port.)

Easy programming

Hitachi provides two different programming software.

1) Pro-H : IEC61131-3 standard, Multiprogramming languages.

2) LADDER EDITOR for Windows : Easy ladder programming editor

(The both in one CD package)

High speed micro processor

EH-150 and MICRO-EH has a 32 bits RISC microprocessor called “Super H”.

Compact size

The compact PLC has more capabilities with high reliability, and saves more space and cost.

Open network

EH-150 series has Profibus DP master/slave modules and DeviceNet master/slave modules,

which will increase application range.

Flexible product line up

Digital I/O (normal / high density), analog I/O (V, I, PT100/1000), high speed counter, positioning,

several communication modules are available.

Solution for total automation system

Hitachi provides many options besides PLC as follows.

-Operator panel EH-HMI series

-Remote I/O system EH-RIO series

-Frequency inverters L/SJ100 and L300P/SJ300 series.

1. Introduction

What is a PLC?

“PLC” stands for Programmable Logic Controller. PLC is an industrial controller, which enables the

control of many devices and signals easily and flexibly. The PLC is “Programmable” by PC or hand

held programming unit. The PLC’s basically work in 3 steps : reading input data, calculating in the

CPU and writing output data according to user program in the PLC.

How it works?

The PLC has a CPU. The CPU executes (scans) a user program. When the CPU reaches the end of

the program, the CPU will return to the program top and execute again, this process is continuous. In

every cycle, input data is read, and output data is written once each.

Input and output data is effective once in a scan.

This is called “Refresh Processing”.

* Scan time (cycle time) depends on your program. (Normally 5 to 30ms.)

Time

1 cycle

Program Scanning

Read Input data Write Output data System processing

and Communication

1 cycle

Input

- Switches

- Sensors

- Encoders, etc.

PLC Output

- Valves

- Relays

- Alarms, etc.

CPU

OutputInput

Calculating

Program

Basic flow

Download from PC to CPU

The program is stored in

FLASH memory of CPU

Start the PLC by PC or

RUN switch on the PLC

PLC starts operation according to the user program.

RUN

Program

CPU module

PLC

CPU module

FLASH memory

Program

Program memory (SRAM)

Data memory (SRAM)

Retentive Data memory

(SRAM)

Micro processor

FLASH memory keeps the

program after power OFF.

CPU module

FLASH memory

Program memory (SRAM)

Data memory (SRAM)

Retentive Data memory

(SRAM)

Micro processor

Input

Output

ççç

èèè

Programming on PC

Programming software

required (see page 1)

2. Hitachi PLC

System design

Hitachi has a compact type PLC “MICRO-EH”and modular type PLC “EH-150”.

nMICRO-EH

I/O modules

(+ terminal cover)

Base unit

CPU module

Power supply module

Expansion connector

LED indication

Terminal block

EH-150

Input terminal

Output terminal

Communication port 2

(RS-422/485)

Expansion

connector

LED indication

RUN/STOP

switch

Potentiometer

×2

Communication

Port 1

èRUN

(RS-232C)

Communication port 1 (RS-232C/422*/485*)

Communication port 2 (RS-232C)

RUN/STOP switch

Reset button

Error LED

RUN LED

Battery

* : Supported by CPU308/316/448

Binary, decimal and hexadecimal code

Before going into the Hitachi PLC details, it is important to understand the numbering system of the

PLC. Electric devices like PLC’s can handle only digital data. The minimum unit of digital data is a

“bit”. 1 bit has two states, 0 or 1.

4 bits can give us 16 different values because of 24as below left.

Since 4 bits of data is not easy to handle, the data is translated to hexadecimal code 0 to F as above

right. One hexadecimal code (= 4 bits) can express 16 different values.

4 hexadecimal codes have 65,535 values (= 164). This unit (4 hexadecimal codes = 16 bits) is called

as“Word”. Normally Hitachi PLC handles binary data and word data.

This is a comparison table of one “Word”in binary, decimal and hexadecimal expressions.

2 10 16 2 10 16

0000 0000 0000 0000 0 H 0000 0000 0000 0011 1111 63 H 003F

0000 0000 0000 0001 1H 0001 0000 0000 0100 0000 64 H 0040

0000 0000 0000 0010 2H 0002

0000 0000 0000 0011 3H 0003 0000 0000 1111 1111 255 H 00FF

0000 0000 0000 0100 4H 0004 0000 0001 0000 0000 256 H 0100

0000 0000 0000 0101 5H 0005

0000 0000 0000 0110 6H 0006 0000 0011 1111 1111 1023 H 03FF

0000 0000 0000 0111 7H 0007 0000 0100 0000 0000 1024 H 0400

0000 0000 0000 1000 8H 0008

0000 0000 0000 1001 9H 0009 0000 0111 1111 1111 2047 H 07FF

0000 0000 0000 1010 10 H 000A 0000 1000 0000 0000 2048 H 0800

0000 0000 0000 1011 11 H 000B

0000 0000 0000 1100 12 H 000C 0000 1111 1111 1111 4095 H 0FFF

0000 0000 0000 1101 13 H 000D 0001 0000 0000 0000 4096 H 1000

0000 0000 0000 1110 14 H 000E

0000 0000 0000 1111 15 H 000F 0111 1111 1111 1111 32767 H 7FFF

0000 0000 0001 0000 16 H 0010 1000 0000 0000 0000 32768 H 8000

0000 0000 0001 1111 31 H 001F 1111 1111 1111 1111 65535 H FFFF

0000 0000 0010 0000 32 H 0020

Binary code

Hexadecimal code

4 bits

16 values

Word

I/O data types

Hitachi PLC’s handles the following I/O.

Bit

(for Digital data, etc) Word

(for Analog data, etc) Double Word

Input X ¨¨¨¨ [D]WX ¨¨¨ [H] DX ¨¨¨ [H]

External

I/Os Output Y ¨¨¨¨ [D]WY ¨¨¨ [H] DY ¨¨¨ [H]

Normal memory R ¨¨¨¨ [H] WR ¨¨¨ [H] DR ¨¨¨ [H]

Shared memory M ¨¨¨¨ [H] WM ¨¨¨ [H] DM ¨¨¨ [H]

Link memory L ¨¨¨¨ [H] WL ¨¨¨ [H] DL ¨¨¨ [H]

Timer (TD,SS, etc.) TD ¨¨¨ [D]- -

Counter (CU, etc.) CU ¨¨¨ [D]- -

Edge detection áDIF ¨¨¨ [D]- -

Internal

I/Os

Edge detection âDFN ¨¨¨ [D]- -

Note : [D] ... Decimal (ex. 00,01,...,09,10,...,15,16,17,18,19,20,21,...)

[H] ... Hexadecimal (ex. 00,01,...,09,0A,0B,...0F,10,11,...1F,20,21,...)

Bit, Word and Double Word

Double Word consists of 2 Words, and 1 Word consists of 16 bits as below.

External I/O

External I/Os (X, Y, WX, WY, etc.) are direct addresses for each digital input/output module or analog

input/output module.Please note bit I/Os X and Y are decimal expression.

(WX/WY can be used as access command or data for high function modules like the counter

module.)

WX 0

13 X

14 X

15 X

WX 1

17 X

18 X

29 X

30 X

31 X

WX 2

33 X

34 X

45 X

46 X

DX 0

DX 1

DX 2

Word (16 bits)

Double Word (32 bits)

Example : WR 0 = H’1234, WR 1 = H’5678 èDR 0 = H’5678 1234

WR 1 WR 0

Internal I/O

Internal I/O (R, WR, M, WM, etc.) means data memory. This data memory area can be read or

written freely for flags, parameters, set point valuesor calculation depending on your program.

* Refer to the chapter “Programming”for further information about TD, CU, DIF and DFN.

Note : “R”and “WR/DR”are physically separated memory areas.

[ M, L ]

Note : “M”, “WM”and “DM”are in one common memory area. (L/WL/DL as well.)

WR 0 WR 1 WR 2

DR 0

DR 1

DR 2

No bit access No bit access No bit access

10 R

11 R

12 R

13 R

14 R

15 R

16 R

17 R

18 R

19 R

1A R

1B R

1C R

1D R

1E R

1F R

20 R

WM 0

WM 1

11 M

12 M

1D M

1E M

1F M

WM 2

21 M

22 M

2D M

2E M

DM 0

DM 1

DM 2

Note : “L”is available only for the LINK module

[ R, WR ]

I/O address of MICRO-EH

The I/O address of MICRO-EH is fixed.

X0 –X5

Input

Y100 –Y103

Output

X0 –X7

Y100 –Y105

X0 –X15

Y100 –Y111

10/14/28 points

DI ×6

DO ×4

DI ×8

DO ×6

DI ×16

DO ×12

X0 –X12

Y100 –Y109

WX30,31

WY40

23 points

DO ×10

DI ×13 AI ×2

AO ×1

Expansion units

: Digital Input

: Digital Output

: Analog Input

: Analog Output

Y1016 –Y1021

X2000 –X2007

Y2016 –Y2021

X3000 –X3007

Y3016 –Y3021

X4000 –X4007

Y4016 –Y4021

X1000 –X1007DI ×8

DO ×6

I/O address of EH-150

The I/O address of EH-150 depends on the module location and I/O type.

&Hexadecimal expression

As mentioned above, each hexadecimal code can be expressed as 4 bits.

0 : 0000 4 : 0100 8 : 1000 C : 1100

1 : 0001 5 : 0101 9 : 1001 D : 1101

2 : 0010 6 : 0110 A : 1010 E : 1110

3 : 0011 7 : 0111 B : 1011 F : 1111

Since one word (WX, WY, WM, etc.) consists of 16 bits (X, Y, M, etc.), the relation between WX/WY

and X/Y is as follows. (“H”stands for hexadecimal.)

WX 0 = H1234 = 0001 0010 0011 0100

WY 5 = H00FF = 0000 0000 1111 1111

X15 X0X7X8

Y15 Y0Y7Y8

Bit number (decimal)

Slot number (0 - 7)

Unit number (0 - 1)

I/O type

Word number

Slot number (0 - 7)

Unit number (0 - 1)

I/O type

[ Bit ]

¨¨ [ Word ]

X0000 –X0015

CPU

Power supply

Basic unit

(Unit 0)

Expansion unit

(Unit 1)

I/O controller module

EH-XD16

EH-YTP64

EH-YTP32

EH-AX8V

EH-XD16

EH-AX8V

X0100 –X0115

WX020 –WX027

EH-AY4V

Y0300 –Y0363

WY040 –WY043

Y1200 –Y1231

EH-XD64

X1000 –X1063

WX140 –WX147

16 DI 16 DI

8 AI

64 DO

4 AO

64 DI

32 DO

4 AI

01234

* 16 DI : 16 points Digital Input module, 4 AO : 4 channels Analog Output module

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