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

1
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.

2
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
1 cycle
Input
- Switches
- Sensors
- Encoders, etc.
PLC Output
- Valves
- Relays
- Alarms, etc.
CPU
OutputInput
Calculating
Program

3
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)

4
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
n 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
é
* : Supported by CPU308/316/448

5
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
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Binary code
Hexadecimal code
4 bits
16 values
0
0
0
1
1
0
0
1
0
1
1
1
0
1
1
1
1
2
E
F
Word
0
1
or

6
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,...)
n Bit, Word and Double Word
Double Word consists of 2 Words, and 1 Word consists of 16 bits as below.
n 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.)
X
0
WX 0
X
1X 2X 13 X 14 X 15 X 16
WX 1
X
17 X 18 X 29 X 30 X 31 X 32
WX 2
X
33 X 34 X 45 X 46 X 47
DX 0
DX 1
DX 2
B
i
t
15
B
i
t
14
B
i
t
13
B
i
t
12
B
i
t
11
B
i
t
10
B
i
t
9
B
i
t
8
B
i
t
7
B
i
t
6
B
i
t
5
B
i
t
4
B
i
t
3
B
i
t
2
B
i
t
1
B
i
t
0
Word (16 bits)
B
i
t
15
B
i
t
14
B
i
t
13
B
i
t
12
B
i
t
11
B
i
t
10
B
i
t
9
B
i
t
8
B
i
t
7
B
i
t
6
B
i
t
5
B
i
t
4
B
i
t
3
B
i
t
2
B
i
t
1
B
i
t
0
Double Word (32 bits)
Example : WR 0 = H’1234, WR 1 = H’5678 èDR 0 = H’5678 1234
WR 1 WR 0

7
n 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
R
0R 1R 2R 3R 4R 5R 6R 7R 8R 9R AR BR CR DR ER FR 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 21
M
0
WM 0
M
1M 2M DM EM FM 10
WM 1
M
11 M 12 M 1D M 1E M 1F M 20
WM 2
M
21 M 22 M 2D M 2E M 2F
DM 0
DM 1
DM 2
Note : “L”is available only for the LINK module
[ R, WR ]

8
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
n 10/14/28 points
DI ×6
DO ×4
DI ×8
DO ×6
DI ×16
DO ×12
X0 –X12
Y100 –Y109
WX30,31
WY40
n 23 points
DO ×10
DI ×13 AI ×2
AO ×1
n Expansion units
DI
DO
AI
AO
: 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

9
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 ]
X
¨ ¨ ¨¨ [ Word ]
WX
¨ ¨ ¨
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
01234
* 16 DI : 16 points Digital Input module, 4 AO : 4 channels Analog Output module