Mitsubishi Electric MELSEC-A Series User manual

User's Manual
It _
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type A2CCPU (P21/R21)
•MITSUBISHI
.... ELECTRIC

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I
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REVISIONS
*The manual number is given on the bottom left of the back cover.
Print Date *Manual Number Revision
Nov, 1990 IB (NA) 66267-A First edition

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INTRODUCTION
Thank you for choosing the Mitsubishi MELSEC-ASeries of General Purpose Programmable Control-
lers. 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.

1
CONTENTS
INTRODUCTION •...••...•••••....••.•••••••••••....•••••.••••••••••••• 1-1 -1-11
1.1 General Description of Operation 1-2
1.1.1 ON/OFF data communication between the A2C and the remote I/O module •. . . .. 1 - 2
1.1.2 Data communication between the A2CCPU and the remote terminal module
..... 1 - 4
1.2 Features. ................................................................. .. 1 - 5
1.3 General Terms and Abbreviations 1 - 9
1.4 Reference Manuals
.........................................................• 1- 11
I
2SYSTEM CONFIGURATION 2-1 -2-16
2.1 Overall Configuration ..........................................................2 - 1
2.2 Notes on System Construction 2 - 3
2.3 System Equipment 2 - 8 4
2.3.1 Modules which can be connected to the A2CCPU 2 - 8
2.3.2 Peripheral devices 2 - 15
3GENERAL SPECIFICATIONS 3-1
4A2CCPU ••••••...••••....••••••••••••..••....••••••.•...••••...••••. 4-1 - 4-94
4.1 Performance ............................................................•.. .. 4 - 1
4.1.1 Repeated operation processing 4 - 4
4.1.2
In~ial processing 4 - 4
4.1.3 END processing 4 - 5
4.1.4 Timerprocessing and accuracy 4 - 6
4.1.5 Counterprocessing and maximum counting speed 4 - 8
4.1.6 Operation processing at momentary powerfailure 4 - 9
4.1.7 Scantime 4
-10
4.1.8 Watch dog timer (WDl) 4 - 11
4.1.9 RUN. STOP. PAUSE operation processing
4-13
4.2 Functions 4 - 18
4.2.1 Constant scan 4 - 19
4.2.2 Power failure compensation for device data in the A2C
(LATCHfunction) 4 - 22
4.2.3 Running and stoppingthe A2C from external devices
(Remote RUN/STOPfunction) 4 - 24
4.2.4 Stoppingthe sequence program operation retaining outputs (PAUSEfunction)
.. 4 - 26
4.2.5 Status latch
.......................................................•.. 4 - 28
4.2.6 Samplingtrace 4 - 30
4.2.7 Offline
sw~ch function 4 - 33
4.2.8 Setting priority for ERRORLED indication 4 - 35
4.2.9 Control functions of remote I/O modules and remote terminal modules 4 - 37
4.2.10 Outputfrom the ERRterminals 4 - 41
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I4.3 Fault Detection 4 - 42
4.3.1 SeR-diagnosis 4 - 42
4.3.2 Faultdetection with annunciator
(F) 4 - 47
4.4 ParameterSetting Range 4 - 49
4.4.1 Memory capacity setting 4 - 53
4.4.2 Operation mode at an occurrence of error 4 - 55
4.4.3 STOP
-+ RUN output mode 4- 56
4.4.4 Entry code registration 4 - 57
4.4.5 Printtitle registration .
.. .. . .. . .. .. .. . .. .. ... .. . .. . .. . . .. .. . . .. . .. . .. . 4- 57
4.5 Devices 4 - 58
4.5.1 Device list 4 - 58
4.6
INSTRUCTIONS 4 - 60
4.6.1 Sequence instructions 4 - 60
4.6.2 Basic instructions 4 - 62
4.6.3 Application instructions 4 - 68
4.7 I/O Numbers and Station Number Setting 4 - 74
4.8 Precautions on Handling 4 - 76
4.9 PartIdentification 4 - n
4.10 PartIdentification 4 - 84
4.10.1 Externalview of A2CCPUP21/R21 4 - 84
4.10.2 Setting for MELSECNET Data Link 4 - 92
4.10.3 Selecting test mode 4 - 93
4.10.4 SeR-loopbacktest
4-94
5 MEMORY ICa, BATTERY, CABLES AND DIN ADAPTER 5 -1 - 5 -10
5.1 MemoryICs 5- 1
5.1.1 Specifications 5- 1
5.1.2 Handling instructions 5- 1
• 5.1.3 Installation............................................................ 5- 2
5.2 Battery......................................................................5-3
5.2.1 Specifications.. ..................................................... .. 5- 3
5.2.2 Handling instructions 5- 3
5.2.3
Installation............................................................ 5- 4
5.3 Cables 5 - 5
5.4 DINAdapter 5- 7
5.4.1 Specifications.. . .. . . . .. . .. . .. .. .. . .. . .. . . .. . . .. . .. .. . . .. . . .. . .. .... 5- 7
5.4.2 Handling instructions 5- 7
5.4.3 Fixinga DIN adapter to a module 5- 9
5.4.4 Mounting to the DINrail 5- 10
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6 LOADING AND INSTALLATION 6 -1 -6 -11
6.1 Fail-safe Circuit. ............................................................ .. 6 - 1t
6.2 Installation Environment 6 - 1 ,
6.3 Calculation of Heat Generated by the A2C System 6 - 2
6.4 Wiring. ................................................................... .. 6 - 4
6.4.1 Wiring instructions 6 - 4
6.4.2 Connection between
modules. ......................................... .. 6 - 8
6.5 InstallingThe A2CCPU 6 - 11
7TEST RUN
••••••••••••••••••••••.•••••••.....••••••••••••...•••••••••• 7- 1 - 7 - 4
7.1 Check Points before Test Run 7 - 1
7.2 Test Run Procedures. ....................................................... .. 7 - 3
8MAINTENANCE AND INSPECTION 8 - 1 - 8 - 4
8.1 Daily Inspection ...........................................................•.. 8 - 1
8.2 Periodic Inspection
..........................................................• 8 - 2
8.3 Replacement ofBattery......................................................
.. 8 - 3
8.3.1 Battery
IKe 8 - 3
8.3.2 Replacing procedures 8 - 4
9TROUBLESHOOTING .•••••....••••••••••••••••.•••......•.......••••.. 9 - 1 - 9 - 15
9.1 Basic Troubleshooting. ...................................................... .. 9 - 1
9.2 Troubleshooting 9 - 2
9.2.1 Troubleshootingflow
charts. ........................................... .. 9 - 2
9.2.2 Flow chart used when "POWER" LEDof the A2CCPU has turned off 9 - 3
9.2.3 Flow chart used when "RUN" LEDof the A2CCPU has turned off
.. ........... .. 9 - 4
9.2.4 Flow chart usedwhen "RUN" LEDof the A2CCPU flickers
..................•.. 9 - 5
9.2.5 Flow chart used when "ERROR" LEDhas turned on 9 - 6
9.2.6 Flow chart used when "ERROR" LEDof the A2CCPUflickers
...............•.. 9 - 8
9.2.7 Flow chart used when "RD/SD" LEOs of
the A2CCPU do not flicker 9 - 9
9.2.8 Flow chart used when output load of output module does not turn on 9 - 10
9.2.9 MaKunetion in program download to PC
............................•..... 9 - 11
9.3 Error Code Ust 9 - 12
9.3.1 Error code list 9
-12
APPENDICES •••••••••.••••••••••..•••....••••....•••.•.•••••..••••• APP - 1 - APP - 28
APPENDIX1 Outside Dimensions APP- 1
APPENDIX2 Ust of Special Relays APP- 6
APPENDIX3 List of Special Registers APP- 10
APPENDIX4 Instructionsfor Use with Peripheral Devices APP- 20
APPENDIX5 Cautions on Editing Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.. APP- 28
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1. INTRODUCTION
--------------------
MELSEC·A
Remote I/O
module:
•
1. INTRODUCTION
This manual gives the system, specifications and handling of the A2CCPU,
A2CCPUP21 and A2CCPUR21 General-purpose Programmable Controller
(referred to as A2C in this manual).
The A2C is a building block type CPU module which can construct asystem
including remote I/O modules (I/O modules) and remote terminal modules
(special-function modules)
(*')
without using abase unit.
The A2C uses the MELSECNET/MINI-S3 data link system (*2) (referred to as
MINI-53 in this manual) in place of a base unit for data communication with
the
remote I/O module and the remote terminal module
through
s-core flat
cables or twtsted-pair cables.
Using s-core flat cables,
the
system modules can be arranged close to each
other just as the building block type CPU is used.
Using twisted-pair cables, the system modules can be separated up to 100
meters (328.1
It)
away from each other
(*1.
This feature makes it possible
to install
the
remote I/O module and the remote terminal module to conform
with the arrangement of equipment to be controlled.
IREMARKsl
(1)
.1...
"Remote I/O module" and "remote terminal module" are general terms for the
mcdulee
mentioned below.
Input/output modules connectable to the A2C. Mitsubishl
general-purpose
inverter
FR~Z200
series,
MELSEC-F
series programmable controllers
Remote terminal
module:
Special function modules connectable to the A2C, RS-
232C
interface
modules
See Section
2.3
for names and types of the remote I/O modules and the remote
terminal modules.
(2)
*2
.,.
The MELSECNET/MINI-S3 data link system has been designed to reduce the amount
of wiring between the PC and equipment to be controlled. Since the PC, the remote
I/O module and the remote terminal module are connected with twisted-pair cables
or optical fiber cables, it is possible to install the remote I/O module and the remote
terminal module to suit with the arrangement of equipment to be controlled.
(3)
*3...
Distance allowed when twisted-pair cables of
0.5
mm2(20 AWG) or thicker are used.
The maximum allowable distance is 50 meters (164.1
tt)
when twisted-pair cables of
0.3
mm
2
(22 AWG) or thinner are used.
1
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1. INTRODUCTION
-------------------- MELSEC·A
1.1 General Description of Operation
Thissection describesthe datacommunication between the A2C, the remote
I/O module and
the remote terminal module.
See Section 4.2
for the A2C functions.
1.1.1 ON/OFFdata communication between the A2C and the remote I/O module
ON/OFF data communication is performed using inputs (X) and outputs
(Y).
(1) Input/output number assignment of the remote I/O module
The
input/output numbers of the A2C system are assigned from x/yOOO
to X/y1FFin the order ofthe station number (1 to 64) set for each remote
I/O module.
Data communication with a remote I/O module is performed using ..
inputs (X) and outputs
(Y) assigned for each module. 'Ill
See Section 4.7 for the relationship between station numbers and i/O
numbers.
(2) ON/OFF data communication with
the remote I/O module
The ON/OFF data communication with the remote I/O module is per-
formed in the refresh mode.
Fig. 1.1 shows the data communication between the A2C and the
~
remote I/O modules. ,
(b) ON/OFF data of output (Y) is output.
I
A2C
Station: 1
(a) Sequence program execution I-:
CPU
I/O
H
X?
/' (c) ON/OFF data from the
o ,
Y20
input (x) module Is taken in.
,
Station: 9
I/O
,
MINI-S3Iink
,
~_r,l
,
n '-'
Y21
~
I/O
0------
I/O
The sequence program uses input (X) and
output M numbers to control remote I/O
Station: n Station: 5
modules.
When the A2C is running, operations (a), (b) and (0) mentioned below are executed repeatedly.
(a) The sequence program is executed from step 0 to END (FEND).
(b)
ON/OFF data of an output (Y) in the sequenca program is output by the MINI-S3 link.
(c)
ON/OFF data from an input module is taken In by the MINI-S3 link.
Fig. 1.1 ON/OFF Data Communication between the A2C and the Remote I/O Modules
1-2
41