Mitsubishi A1SJH User manual

Mitsubishi Programmable Logic Controller
Type A1SJH(S8)/A1SH/A2SHCPU (S1)
Type A1SJH(S8)/A1SH/A2SHCPU (S1) User's Manual
User,s Manual
MODEL
MODEL
CODE
ANSHCPU-U-E
13JL22
IB(NA)-66779-G(0312)MEE
Type A1SJH(S8)/A1SH/A2SHCPU (S1)
User,s Manual
U
Specifications subject to change without notice.
When exported from Japan, this manual does not require application to the
Ministry of Economy, Trade and Industry for service transaction permission.
HEAD OFFICE : 1-8-12, OFFICE TOWER Z 14F HARUMI CHUO-KU 104-6212,JAPAN
NAGOYA WORKS : 1-14 , YADA-MINAMI 5-CHOME , HIGASHI-KU, NAGOYA , JAPAN

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SAFETY PRECAUTIONS
(Read these precautions before using.)
When using Mitsubishi equipment, thoroughly read this manual and the associated manuals introduced in
this manual. Also pay careful attention to safety and handle the module properly.
These SAFETY PRECAUTIONS classify the safety precautions into two categories: "DANGER" and
"CAUTION".
!DANGER
CAUTION
!
Indicates that incorrect handling may cause hazardous conditions,
resulting in death or severe injury.
Indicates that incorrect handling may cause hazardous conditions,
resulting in medium or slight personal injury or physical damage.
Depending on circumstances, procedures indicated by !CAUTION may also be linked to serious
results. In any case, it is important to follow the directions for usage.
Store this manual in a safe place so that you can take it out and read it whenever necessary. Always
forward it to the end user.
[DESIGN PRECAUTIONS]
!DANGER
Install a safety circuit external to the PLC that keeps the entire system safe even when there
are problems with the external power supply or the PLC module. Otherwise, trouble could result
from erroneous output or erroneous operation.
(1) Outside the PLC, construct mechanical damage preventing interlock circuits such as
emergency stop, protective circuits, positioning upper and lower limits switches and
interlocking forward/reverse operations.
(2) When the PLC detects the following problems, it will stop calculation and turn off all output
in the case of (a). In the case of (b), it will stop calculation and hold or turn off all output
according to the parameter setting.
Note that the AnS series module will turn off the output in either of cases (a) and (b).
(a) The power supply module has over current protection equipment and over voltage
protection equipment.
(b) The PLC CPUs self-diagnosis functions, such as the watch dog timer error, detect
problems.
In addition, all output will be turned on when there are problems that the PLC CPU cannot
detect, such as in the I/O controller. Build a fail safe circuit exterior to the PLC that will make
sure the equipment operates safely at such times. See section 9.1 of this manual for
example fail safe circuits.
(3) Output could be left on or off when there is trouble in the outputs module relay or transistor.
So build an external monitoring circuit that will monitor any single outputs that could cause
serious trouble.

A - 2
[DESIGN PRECAUTIONS]
!DANGER
When overcurrent which exceeds the rating or caused by short-circuited load flows in the output
module for a long time, it may cause smoke or fire. To prevent this, configure an external safety
circuit, such as fuse.
Build a circuit that turns on the external power supply when the PLC main module power is
turned on. If the external power supply is turned on first, it could result in erroneous output or
erroneous operation.
When a data link results in a communication error, the faulty station changes in operating status
depending on the used data link type.
(1) For the data link data, the data prior to the communication error will be held.
(2) The MELSECNET (II,/B,/10) remote I/O station will turn all output off.
(3) The MELSECNET/MINI-S3 remote I/O station will hold the output or turn all output off
depending on the E.C. remote setting.
Refer to the data link manuals regarding the method for setting the communication problem
station and the operation status when there are communication problem.
When connecting a peripheral device to the CPU module or connecting a personal computer or
the like to the intelligent function module to exercise control (data change) on the running PLC,
configure up an interlock circuit in the sequence program to ensure that the whole system will
always operate safely.
Also before exercising other control (program change, operating status change (status control))
on the running PLC, read the manual carefully and fully confirm safety.
Especially for the above control on the remote PLC from an external device, an immediate
action may not be taken for PLC trouble due to a data communication fault.
In addition to configuring up the interlock circuit in the sequence program, corrective and other
actions to be taken as a system for the occurrence of a data communication fault should be
predetermined between the external device and PLC CPU.
When configuring a system, do not leave any slots vacant on the base. Should there be any
vacant slots, always use a blank cover (A1SG60) or dummy module (A1SG62).
When the extension base A1S52B, A1S55B or A1S58B is used, attach the dustproof cover
supplied with the product to the module installed in slot 0.
If the cover is not attached, the module's internal parts may be dispersed when a short-circuit
test is performed or overcurrent/overvoltage is accidentally applied to the external I/O area.

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[DESIGN PRECAUTIONS]
!CAUTION
Do not bunch the control wires or communication cables with the main circuit or power wires, or
install them close to each other. They should be installed 100 mm (3.94 inch) or more from
each other. Not doing so could result in noise that would cause erroneous operation.
When controlling items like lamp load, heater or solenoid valve using an output module, large
current (approximately ten times greater than that present in normal circumstances) may flow
when the output is turned OFF to ON.
Take measures such as replacing the module with one having sufficient rated current.
[INSTALLATION PRECAUTIONS]
!CAUTION
Use the PLC in an environment that meets the general specifications contained in this manual.
Using this PLC in an environment outside the range of the general specifications could result in
electric shock, fire, erroneous operation, and damage to or deterioration of the product.
Hold down the module loading lever at the module bottom, and securely insert the module
fixing latch into the fixing hole in the base unit.
Incorrect loading of the module can cause a malfunction, failure or drop.
When using the PLC in the environment of much vibration, tighten the module with a screw.
Tighten the screw in the specified torque range. Undertightening can cause a drop, short circuit
or malfunction. Overtightening can cause a drop, short circuit or malfunction due to damage to
the screw or module.
When installing extension cables, be sure that the connectors of base unit are installed
correctly. After installation, check them for looseness. Poor connections could cause an input or
output failure.
Correctly connect the memory cassette installation connector to the memory cassette. After
installation, be sure that the connection is not loose. A poor connection could cause an
operation failure.
Completely turn off the external power supply before loading or unloading the module. Not
doing so could result in electric shock or damage to the product.
Do not directly touch the module's conductive parts or electronic components. Touching the
conductive parts could cause an operation failure or give damage to the module.

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[WIRING PRECAUTIONS]
!DANGER
Completely turn off the external power supply when installing or placing wiring. Not completely
turning off all power could result in electric shock or damage to the product.
When turning on the power supply or operating the module after installation or wiring work, be
sure that the module's terminal covers are correctly attached. Not attaching the terminal cover
could result in electric shock.
!CAUTION
Be sure to ground the FG terminals and LG terminals to the protective ground conductor. Not
doing so could result in electric shock or erroneous operation.
When wiring in the PLC, be sure that it is done correctly by checking the product's rated voltage
and the terminal layout. Connecting a power supply that is different from the rating or incorrectly
wiring the product could result in fire or damage.
Do not connect multiple power supply modules in parallel.
Doing so could cause overheating, fire or damage to the power supply module.
External connections shall be crimped or pressure welded with the specified tools, or correctly
soldered. Imperfect connections could result in short circuit, fires, or erroneous operation.
Tighten the terminal screws with the specified torque. If the terminal screws are loose, it could
result in short circuits, fire, or erroneous operation. Tightening the terminal screws too far may
cause damages to the screws and/or the module, resulting in fallout, short circuits, or
malfunction.
Be sure there are no foreign substances such as sawdust or wiring debris inside the module.
Such debris could cause fires, damage, or erroneous operation.
The module has an ingress prevention label on its top to prevent foreign matter, such as wire
offcuts, from entering the module during wiring.
Do not peel this label during wiring.
Before starting system operation, be sure to peel this label because of heat dissipation.

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[STARTUP AND MAINTENANCE PRECAUTIONS]
!DANGER
Do not touch the terminals while power is on.
Doing so could cause shock or erroneous operation.
Correctly connect the battery.
Also, do not charge, disassemble, heat, place in fire, short circuit, or solder the battery.
Mishandling of battery can cause overheating or cracks which could result in injury and fires.
Switch all phases of the external power supply off when cleaning the module or retightening the
terminal or module mounting screws. Not doing so could result in electric shock.
Undertightening of terminal screws can cause a short circuit or malfunction. Overtightening of
screws can cause damages to the screws and/or the module, resulting in fallout, short circuits,
or malfunction.
!DANGER
The online operations conducted for the CPU module being operated, connecting the peripheral
device (especially, when changing data or operation status), shall be conducted after the
manual has been carefully read and a sufficient check of safety has been conducted.
Operation mistakes could cause damage or problems with of the module.
Do not disassemble or modify the modules.
Doing so could cause trouble, erroneous operation, injury, or fire.
Use any radio communication device such as a cellular phone or a PHS phone more than
25cm (9.85 inch) away from the PLC.
Not doing so can cause a malfunction.
Switch all phases of the external power supply off before mounting or removing the module.
If you do not switch off the external power supply, it will cause failure or malfunction of the
module.
Do not drop or give an impact to the battery installed in the module.
Otherwise the battery will be broken, possibly causing internal leakage of electrolyte.
Do not use but dispose of the battery if it has fallen or an impact is given to it.
Always make sure to touch the grounded metal to discharge the electricity charged in the
electricity charged in the body, etc., before touching the module.
Failure to do say cause a failure or malfunctions of the module.

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[DISPOSAL PRECAUTIONS]
!CAUTION
When disposing of this product, treat it as industrial waste.
[TRANSPORTATION PRECAUTIONS]
!CAUTION
When transporting lithium batteries, make sure to treat them based on the transport regulations.
(Refer to Appendix 5 for details of the controlled models.)

A - 7
REVISIONS *The manual number is given on the bottom left of the back cover.
Print Date *Manual Number Revision
May., 1997 IB (NA) 66779-A First edition
Nov., 1997 IB (NA) 66779-B Correction
Contents, Related manuals, Section 1.1, Section
2.1.1, 2.1.2, Section 2.2, 2.3, Chapter 3, Section
4.1.6, Section 5.1, 5.2, Section 6.1.2, Section 8.7.1,
8.7.2, Section 9.1.3, Section 11.3.1, Appendix 1,
1.1, Appendix 3.1, 3.2, Appendix 5.
Apr., 1998 IB (NA) 66779-C Correction
SAFETY PRECAUTIONS, Contents, Section 1.1,
Section 2.2, 2.3, Section 4.1, 4.1.7, 4.1.8, 4.1.9, 4.4.3,
Section 6.1.3, Section 7.1.4, Section 8.7.1,
Section 9.2.1, 9.2.2, Section 11.3.1, Appendix 1, 1.1,
Appendix 3.1, 3.2, 3.3.3.
Aug., 1998 IB (NA) 66779-D Correction
Section 2.2.1, 2.3, Section 4.1, Section 9.1.2.7, 9.1.2.9
Section 11.2.4
Appendix 2.2, 3.3.5
Nov., 1998 IB (NA) 66779-E Addition of module
A1SJHCPU-S8
Dec., 2002 IB (NA) 66779-F Equivalent to the Japanese version F
Correction
SAFETY PRECAUTIONS, Section 1.1, 1.2, Section 2.1.1,
2.1.2, 2.2.1, 2.2.2, 2.3, Chapter 3, Section 4.1.1, 4.1.7,
Section 5.1, 5.2, Section 6.1.3, Section 7.1.1, Section 9.1.4,
Chapter 10, Section 11.1.3, Appendix 2.1, 2.2, Appendix 4
Dec., 2003 IB (NA) 66779-G Addition of module
A1SY42P
Correction
Section 2.2.1, 2.3, Section 7.1.1, 7.1.4, 7.2.1, Section 8.4.1,
8.8, Section 9.1.4, Section 11.3.1, Appendix 2.1
Addition
Appendix 5
Japanese Manual Version SH (NA) 3635-G
This manual does not imply guarantee or implementation right for industrial ownership or
implementation of other rights. Mitsubishi Electric Corporation is not responsible for industrial
ownership problems caused by use of the contents of this manual.
1998 Mitsubishi Electric Corporation

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INTRODUCTION
Thank you for choosing the Mitsubishi MELSEC-A Series of General Purpose Programmable
Controllers. Please read this manual carefully so that the equipment is used to its optimum. A
copy of this manual should be forwarded to the end user.

A - 9
Contents
1. OVERVIEW.......................................................................................................................1 – 1 to 1 – 3
1.1 Overview ...............................................................................................................................1 – 1
1.2 Features................................................................................................................................1 – 2
2. SYSTEM CONFIGURATION.......................................................................................... 2 – 1 to 2 – 21
2.1 Overall Configuration.............................................................................................................2 – 1
2.1.1 Total configuration of AnSHCPU ..............................................................................2 – 1
2.1.2 Total configuration of A1SJHCPU(S8)......................................................................2 – 3
2.2 Cautions on Configuring a System........................................................................................2 – 5
2.2.1 Hardware ..................................................................................................................2 – 5
2.2.2 Software packages...................................................................................................2 – 8
2.3 System Equipment..............................................................................................................2 – 10
2.4 General Description of System Configuration.....................................................................2 – 20
2.4.1 Outline of AnSHCPU configuration.........................................................................2 – 20
2.4.2 Outline of A1SJHCPU(S8) configuration ................................................................2 – 21
3. SPECIFICATIONS ..........................................................................................................................3 – 1
4. AnSHCPU MODULE....................................................................................................... 4 – 1 to 4 – 22
4.1 Performance Specifications ..................................................................................................4 – 1
4.1.1 Outline of AnSHCPU operation processing..............................................................4 – 3
4.1.2 Operation processing in the RUN, STOP, PAUSE status ........................................4 – 5
4.1.3 Operation processing when a momentary power interruption occurs.......................4 – 6
4.1.4 Self-diagnosis ...........................................................................................................4 – 7
4.1.5 List of devices...........................................................................................................4 – 9
4.1.6 List of parameter setting ranges.............................................................................4 – 11
4.1.7 Memory capacity settings (main programs, file registers, comments, etc.)............4 – 13
4.2 Functions.............................................................................................................................4 – 15
4.3 Handling precautions...........................................................................................................4 – 16
4.4 Part Identification and Setting .............................................................................................4 – 17
4.4.1 Part identification of AnSHCPU, A1SJHCPU (S8)..................................................4 – 17
4.4.2 I/O control switch setting.........................................................................................4 – 20
4.4.3 Memory write protect switch setting........................................................................4 – 20
4.4.4 Clearing latched data..............................................................................................4 – 22
5. POWER SUPPLY MODULE............................................................................................. 5 – 1 to 5 – 5
5.1 Specifications........................................................................................................................5 – 1
5.1.1 Selection of the power supply module......................................................................5 – 3
5.2 Part Identification and Setting ...............................................................................................5 – 4

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6. BASE UNIT AND EXTENSION CABLE ......................................................................... 6 – 1 to 6 – 10
6.1 Specifications........................................................................................................................6 – 1
6.1.1 Specifications of base units ......................................................................................6 – 1
6.1.2 Specifications of extension cables............................................................................6 – 2
6.1.3 Application standards for extension base units
(A1S52B(S1), A1S55B(S1), A1S58B(S1), A52B, A55B, A58B)...............................6 – 2
6.2 Part Identification and Setting ...............................................................................................6 – 7
6.3 Installing and Removal on/from a DIN Rail...........................................................................6 – 9
7. MEMORY CASSETTE AND BATTERY ...........................................................................7 – 1 to 7 – 7
7.1 Memory Cassette..................................................................................................................7 – 1
7.1.1 Specifications............................................................................................................7 – 1
7.1.2 Handling precautions................................................................................................7 – 2
7.1.3 Installing and removing a memory cassette .............................................................7 – 3
7.1.4 Writing a sequence program to a memory cassette.................................................7 – 5
7.1.5 Memory write-protect setting for an A2SNMCA-30KE..............................................7 – 6
7.2 Battery...................................................................................................................................7 – 7
7.2.1 Specifications............................................................................................................7 – 7
7.2.2 Installation of the battery...........................................................................................7 – 7
8. LOADING AND INSTALLATION.................................................................................... 8 – 1 to 8 – 16
8.1 Consideration for Safety........................................................................................................8 – 1
8.2 Installation Environment........................................................................................................8 – 4
8.3 Calculation of Heat Generated by the Programmable Controller System.............................8 – 4
8.4 Module Mounting...................................................................................................................8 – 7
8.4.1 Mounting instructions................................................................................................8 – 7
8.4.2 Installation.................................................................................................................8 – 8
8.5 Installation and Removal of Module......................................................................................8 – 9
8.6 Installing and Removing the Dustproof Cover.....................................................................8 – 11
8.7 Wiring..................................................................................................................................8 – 13
8.7.1 Wiring instructions ..................................................................................................8 – 13
8.7.2 Wiring to module terminals.....................................................................................8 – 16
8.8 Precaution when Connecting the Uninterruptive Power Supply (UPS)...............................8 – 16
9. EMC DIRECTIVE AND LOW-VOLTAGE INSTRUCTION.............................................. 9 – 1 to 9 – 11
9.1 Requirements for Compliance to EMC Directive (89/336/EEC)...........................................9 – 1
9.1.1 EMC standards.........................................................................................................9 – 1

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9.1.2 Installation inside the control cabinet........................................................................9 – 2
9.1.3 Cables.......................................................................................................................9 – 3
9.1.4 Power supply module................................................................................................9 – 7
9.1.5 Ferrite core................................................................................................................9 – 7
9.1.6 Noise filter (power supply line filter)..........................................................................9 – 7
9.2 Requirement to Conform to the Low-Voltage Instruction......................................................9 – 8
9.2.1 Standard applied for AnS series...............................................................................9 – 8
9.2.2 Precautions when using the AnS series ...................................................................9 – 9
9.2.3 Power supply.............................................................................................................9 – 9
9.2.4 Control box..............................................................................................................9 – 10
9.2.5 Module installation..................................................................................................9 – 10
9.2.6 Grounding...............................................................................................................9 – 11
9.2.7 External wiring ........................................................................................................9 – 11
10. MAINTENANCE AND INSPECTION ............................................................................10 – 1 to 10 – 5
10.1 Daily Inspection...................................................................................................................10 – 2
10.2 Periodic Inspection..............................................................................................................10 – 3
10.3 Replacement of Battery.......................................................................................................10 – 4
10.3.1 Service life of battery ..............................................................................................10 – 4
10.3.2 Battery replacement procedure...............................................................................10 – 5
11. TROUBLESHOOTING................................................................................................ 11 – 1 to 11 – 18
11.1 Basic Troubleshooting.........................................................................................................11 – 1
11.2 Troubleshooting ..................................................................................................................11 – 2
11.2.1 Troubleshooting flowcharts.....................................................................................11 – 2
11.2.2 Flowchart used when the POWER LED goes OFF................................................11 – 3
11.2.3 Flowchart used when the RUN LED goes OFF......................................................11 – 4
11.2.4 Flowchart used when the RUN LED flashes...........................................................11 – 5
11.2.5 Flowchart used when the ERROR LED is lit...........................................................11 – 6
11.2.6 Flowchart used when the ERROR LED flashes .....................................................11 – 7
11.2.7 Flowchart used when the output load of the output module
does not come ON..................................................................................................11 – 8
11.2.8 Flowchart used when a program cannot be written to the PLC CPU .....................11 – 9
11.3 Error Code List..................................................................................................................11 – 10
11.3.1 Error codes ...........................................................................................................11 – 10
11.4 I/O Connection Troubleshooting .......................................................................................11 – 16
11.4.1 Input circuit troubleshooting..................................................................................11 – 16
11.4.2 Output circuit failures and corrective action..........................................................11 – 18
APPENDICES................................................................................................................APP – 1 to APP – 50
Appendix 1 Instructions...................................................................................................................APP – 1
Appendix 1.1 Caution when Performing a Write while Running
Dedicated Instruction.........................................................................................APP – 5

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Appendix 2 Special Relay, Special Register List ..........................................................................APP – 6
Appendix 2.1 Special Relay List ..............................................................................................APP – 6
Appendix 2.2 Special Registers D .........................................................................................APP – 18
Appendix 3 Precautions when Switching from AnSCPU to AnSHCPU ......................................APP – 36
Appendix 3.1 Dissimilarities between A1SHCPU and A1SCPU............................................APP – 36
Appendix 3.2 Dissimilarities between A2SHCPU(-S1) and A2SCPU....................................APP – 37
Appendix 3.3 Precautions when Switching the Model...........................................................APP – 37
Appendix 3.3.1 PLC type setting.................................................................................APP – 37
Appendix 3.3.2 The precaution when performing the ROM cutoff ..............................APP – 37
Appendix 3.3.3 The precaution when utilizing the sequence program........................APP – 38
Appendix 3.3.4 System comfirmation by high-speed instruction processing ..............APP – 38
Appendix 3.3.5 Handling conventional memory cassettes..........................................APP – 38
Appendix 3.3.6 Switching from the A2SMCA-14KP
(when A2SCPU + A2SMCA-14KP has been used)............................APP – 39
Appendix 3.3.7 Restrictions in microcomputer programs............................................APP – 39
Appendix 4 Outside Dimensions.................................................................................................APP – 40
Appendix 4.1 CPU Module.....................................................................................................APP – 40
Appendix 4.1.1 A1SHCPU/A2SHCPU(S1) module.....................................................APP – 40
Appendix 4.1.2 A1SJHCPU module............................................................................APP – 40
Appendix 4.1.3 A1SJHCPU-S8 module ......................................................................APP – 41
Appendix 4.2 A1S61PN/A1S62PN/A1S63P Power Supply Module ......................................APP – 41
Appendix 4.3 Main Base Units...............................................................................................APP – 42
Appendix 4.3.1 A1S32B main base unit......................................................................APP – 42
Appendix 4.3.2 A1S33B main base unit......................................................................APP – 42
Appendix 4.3.3 A1S35B main base unit......................................................................APP – 43
Appendix 4.3.4 A1S38B main base unit......................................................................APP – 43
Appendix 4.4 Extension Base Units.......................................................................................APP – 44
Appendix 4.4.1 A1S65B extension base unit ..............................................................APP – 44
Appendix 4.4.2 A1S68B extension base unit ..............................................................APP – 44
Appendix 4.4.3 A1S52B extension base unit ..............................................................APP – 45
Appendix 4.4.4 A1S55B extension base unit ..............................................................APP – 45
Appendix 4.4.5 A1S58B extension base unit ..............................................................APP – 46
Appendix 4.4.6 A1S65B-S1 extension base unit.........................................................APP – 46
Appendix 4.4.7 A1S68B-S1 extension base unit.........................................................APP – 47
Appendix 4.4.8 A1S52B-S1 extension base unit.........................................................APP – 47
Appendix 4.4.9 A1S55B-S1 extension base unit.........................................................APP – 48
Appendix 4.4.10 A1S58B-S1 extension base unit.........................................................APP – 48
Appendix 4.5 Memory Cassette.............................................................................................APP – 49
Appendix 4.5.1 AnSMCA-[ ] memory cassette............................................................APP – 49
Appendix 4.5.2 AnSNMCA-[ ] memory cassette .........................................................APP – 49
Appendix 4.6 Memory Write Adapter.....................................................................................APP – 50
Appendix 4.6.1 A6WA-28P memory write adapter......................................................APP – 50
Appendix 5 Transportation Precautions......................................................................................APP – 50
Appendix 5.1 Controlled models............................................................................................APP – 50
Appendix 5.2 Transport guidelines........................................................................................APP – 50

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About This Manual The following table lists manuals regarding this product.
Related Manuals
Manual Name Manual No
(Model Code)
ACPU Programming Manual (Fundamentals)
Describes programming methods necessary for creating programs,, device names
parameters,, program types,, memory area configuration,, and so on
(Sold separately)
IB-66249
(13J740)
ACPU Programming Manual (Common Instructions)
Describes how to use the sequence instruction,, basic instructions, applied instructions and
microcomputer programs.
(Sold separately)
IB-66250
(13J741)
AnSHCPU/AnACPU/AnUCPU/QCPU-A (A mode) Programming Manual (Dedicated Instructions)
Describes instructions that have been expanded for AnSHCPU.
(Sold separately)
IB-66251
(13J742)
AnS Module type I/O User's Manual
Describes the specification of the compact building block type I/O module.
(Sold separately)
IB-66541
(13JE81)

MEMO

1. OVERVIEW
1 - 1
MELSEC-
A
1. OVERVIEW
1.1 Overview
This user's manual describes the functions, specification, and handling of the
A1SJHCPU general purpose PLC (abbreviated as A1SJHCPU from here on),
A1SJHCPU-S8 general purpose PLC (abbreviated as A1SJHCPU-S8), A1SHCPU
general purpose PLC (abbreviated as A1SHCPU), A2SHCPU general purpose PLC
(abbreviated as A2SHCPU), and A2SHCPU-S1 general purpose PLC (abbreviated
as A2SHCPU-S1).
A1SHCPU, A1SJHCPU and A1SJHCPU-S8 are grouped as A1SHCPU, unless
there is necessity to identify each model.
Also, A1SHCPU, A2SHCPU and A2SHCPU-S1 are grouped as AnSHCPU, unless
there is necessity to identify each model.
The AnSHCPU is a compact-type building block PLC. The model is one third the
size of the conventional building block type PLC, and allows easy operation in spite
of its small size.
AnSHCPUs are miniature building block programmable controllers, which have
been downsized to occupy one third of the volume of conventional building block
type programmable controllers, and are designed to be easy to use in spite of their
small size.
Sequence programs that have been created for the existing A0J2CPU, A0J2HCPU
and A[ ]NCPU models can be used by changing the CPU module type specification
for the program. Moreover, since modules for use with A[ ]NCPU can be used by
installing them on an extension base unit for A[ ]NCPU use, it is possible to extend
the functions of an AnSCPU.
The AnSCPU has functions equivalent to those of the A2NCPU and we urge you to
make the best use of these functions in order to use the equipment efficiently.
This user's manual refers to peripheral devices by using the following abbreviations.
A7PHP, A7HGP, A6GPP, A6PHP, and IBM PC/AT
(started up with SW3IVD-GPPA, MELSEC MEDOC, MELSEC MEDOC plus)
...................................Abbreviated as "GPP function".
A7PUS, A8PUE ...................................Abbreviated as "PU".

1. OVERVIEW
1 - 2
MELSEC-
A
1.2 Features
(1) High-speed operation processing speed
Compared to the conventional A1SCPU, the A1SHCPU is three times and
A2SHCPU (-S1) is four times faster in the operation processing speed,
respectively.
Item A1SHCPU A2SHCPU(-S1) A1SCPU
Operation processing speed *1 0.33 µs 0.25 µs1
µs
*1 I/O processing : Refresh and LD instruction
(2) Addition of new dedicated instructions
The CC-Link dedicated instructions (8 instructions) have been added, making
the operation even easier.
(3) Increased number of I/O device points
The actual number of I/O points is the same as the AnS series, but each CPU
has 2048 points (X/Y0 to 7FF) of I/O devices.
The added I/O device can be used as the MELSECNET (/B),
MELSECNET/MINI-S3, or CC-Link.
(4) Increased file register R capacity
The capacity is now max. 8192 points (R0 to 8191), which doubled the AnS
series' 4096 points (R0 to 4095).
(5) Increased memory capacity (Increased number of comment points)
The A1SHCPU has 64 k bytes, which doubled the A1SCPU's 32 k bytes.
This increased the number of comment points stored in the CPU module 3648
in comparison to the 1600 points in A1SCPU.
(6) Full compatibility with A1S(S1)/A2SCPU(S1)
Because there is full compatibility of the functions and instructions with
A1S(S1)/A2SCPU(S1), all software packages can be used.
In addition, power supply module, base unit, and I/O modules can be used.
(7) Compact size
The outside dimensions of the AnSHCPU system with one power supply
module, one CPU, and eight 16-point I/O modules for use with AnS mounted
to the main base unit are:
430 mm (16.9 in.) (W); 130 mm (5.12 in.) (H); and 110 mm (4.33 in.) (D).

1. OVERVIEW
1 - 3
MELSEC-
A
(8) Max. 8 k/14 k steps of program
An AnSCPU allows the creation of a program of up to 8 k (A1SCPU(S1)/
A1SCPUC24-R2)/ 14 k (A2SCPU(S1)) steps containing up to 26 sequence
instructions, 131 basic instructions, 106 application instructions, and 8 CC-
Link dedicated instructions.
In addition, microcomputer programs and utility programs created by the user
can be used.
(9) SFC language compatible
An AnSCPU contains a microcomputer program area, so it can use an SFC
program by using the software on an IBM personal computer.
(10) Two extension connectors, on the right and left sides.
(A1SJHCPU(S8) on the right side only)
In order to facilitate wiring wherever the extension base unit is installed,
extension connectors are provided at both left and right sides of the
AnSHCPU and extension cables that suit the requirements imposed by
different mounting locations are available.
(11) Use either screws or DIN rail for panel installations
The AnS base unit is provided both with screw holes and, on its rear face, the
fixture for mounting it to a DIN rail.
(12) Easy-to-see terminal block symbol sheet
•A terminal block symbol sheet is attached to the front of AnS I/O modules.
It is possible to write I/O device numbers, connector numbers, etc. on one
side of the sheet.
•Terminal symbols for 16 I/O signals can be written on the other side.
(13) A[ ]N, A[ ]A-series I/O module and special function module compatible
By connecting an A[ ]N, A[ ]A-series extension base unit, A[ ]N, A[ ]A I/O
modules or special function modules can be used.
(14) Same programming environment as other MELSEC-A CPU modules
A sequence program can be created using the peripheral device currently
used for other MELSEC-A CPU modules.
For details on the applicable peripheral devices, see Section 2.2 "Cautions on
System Configuration".

2. SYSTEM CONFIGURATION
2 - 1
MELSEC-
A
2. SYSTEM CONFIGURATION
This chapter describes the applicable system configurations, cautions on
configuring a system, and component devices of the AnSHCPU.
2.1 Overall Configuration
2.1.1 Total configuration of AnSHCPU
The figure below shows a system configuration when the AnSHCPU is used
independently.
Battery (A6BAT)ROM cassette
A1SHCPU
Extension cable (A1SC[ ][ ]B)
Main base (A1S3[ ]B)
(To peripheral device)
•Power supply module
•Input module
•Output module
•Special function module
•Power supply module
•Input module
•Output module
•Special function module
Extension cable (A1SC0[ ]NB)
[Building block type]
(A5[ ]B): Without a power supply module
(A6[ ]B): Equipped with a power supply
module
(A1S5[ ]B (S1)): Without a power supply module
(A1S6[ ]B (S1)): Equipped with a power supply module
A2SHCPU (S1)
ROM cassette
Extension base Extension base
(A2SNMCA-30KE equipped
with E2PROM)
(A1SNMCA-8KP equipped
with EPROM)
(A1SNMCA-[ ]KE equipped
with E2PROM)

2. SYSTEM CONFIGURATION
2 - 2
MELSEC-
A
POINT
For applicable printers, cables, and ROM writers, see the operating
manual for each peripheral device used.
(To AnSHCPU)
AC30R4/
AC300R4
cable
A6PHP plasma
handy graphic
programmer
A6GPP
Intelligent GPP
AC03WU
cable A6WU
P-ROM
writer module
Memory write
adapter dedicated
to A1SNMCA-8KP
(A6WA-28P)
ROM cassette
for A1SHCPU
(A1SNMCA-8KP)
Memory write adapter
dedicated to A1SNMCA-8KP
(A6WA-28P)
ROM cassette
for A1SHCPU
(A1SNMCA-8KP)
AC20R4-A8PU
cable
AC30R4-PUS
cable
A8PUE
Programming module
IBM PLC/AT or
100 % compatible SW0IX-GPPAE
MELSEC-MEDOC
system FD
A7PUS
Programming module
(RS-232C cable)
(RS-232C RS-422
converter)
(RS-422 cable)
*1
*1, *2
*1: Refer to SW0IX-GPPAE Software
Package Operating Manual or the
MELSEC-MEDOC Operating Manual for
connectable cables and devices.
*2: IBM is a registered trademark of the
International Buisiness Machines Corporation.
*: As for the applicable printer ROM
writer, see the operating manuals
for A7PHP/A7HGP.
A7NPR-S1
printer
Parallel
printer
A7PHP plasma
handy graphic
programmer
A7HGP
handy graphic
programmer AC30R2
cable
AC30PIO-26P
cable *
Printer A7NPR-S1
K6PR-K general-
purpose printer
AC30R2
cable
A6DU-B
data access module
AC30R4-PUS
cable
ROM writer*