Mitsubishi A2CCPU User manual
REVISIONS
%The manual number
is
givenonthe
bottom
left
of
the
back
cover.
Print
Date
Mav.
1990
'Manual
Number
~
IB
(NA)
66238-A
Rwkion
First
edition
..
.
.
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Thank you for choosing the Mitsubishi MELSEC-ASeries
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.
1
3
7
4
4.4
4.5
4.6
4.7
4.8
..
5.1
5.2
5.3
5.4
._
.
....
I-....
....
Appendix 1
Appendix 2
Appendix 3
Appendix 4
Appendix
5
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1.
lNTRooUcTl0N
/MELSEC-A
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This manual gives the system, specifications and handling of the
A2CCPU General-purpose ProgrammableController(referred to
as
A2C
in
this manual).
The
A2C is
a
baseless building block type CPU which does not use
a
base
unit
for system construction which includes remote
110
and
terminalmodules
(*1).
The
A2Cuses the MELSECNET/MINI-S3data link system
(*2)
(referredto as MINLS3
in
this manual)
in
place
of
a
base unit for
data communication with theremote
VO
module
and
the remote
terminal module through5core flat cables or twistedpair cables.
Using Scoreflat cables, the system modules can bearranged
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
ft)
away from each other
(*3).
This feature
makes
it
possibleto install the remoteI/O module and the remote
terminal moduleto suit with
the
arrangement of equipmentto be
controlled.
I
REMARK
0
l
.........
"Remote
VO
module" and "remoteterminalmodule" are general
termsforthemodulesmentionedbelow.
Remote
VO
module
:
Input/output modules connectable to the A2C,
Mitsubishi general-purpose inverter FR-ZZOO
series,MELSEC-F series programmablecon-
trollers
I
Remote terminal module
:
Special function modules connectable to
See Section 2.3 for names and
types
of theremote
VO
modules and
theremoteterminal modules.
save theamountofwiringbetweenthe PC and equipmentto be
controlled. Since the PC, the remote
VO
moduleandtheremote
terminal module are connected with twisted paircables or optical
fiber cables,
it
is possible to install the remote
I/O
module and the
remote terminal module to suit with thearrangement of equipment
to be controlled.
thicker are used.
The maximumallowaMe distance is
50
meters
(164.1
ft)
when twisted
pair cables of 0.3mm' (22AWG)orthinner are used.
the A2C,RS-232C interface modules
Q
.2
.........
The MELSECNET/MINI-S3 data linksystem has beendesigned to
@
c3
...
......
Distance allowed when
twisted
pair cables of 0.Smm2(20 AWG)
or
P
L
1.
INTRODUCTION
/MELSEC-A
1.1
GeneralDescription
of
Operation
This section describes the data communication between the
A2C,
theremote
I/O
module and theremoteterminalmodule.
See
Section
4.2
for the
A2C
functions.
1.1.1
ON/OFF
data
communication between
the
A2C
and
the
remote
I/O
module
ON/OFF data communication
is
performed using inputs
(X)
and
outputs
(Y).
(1)
Inputloutput number assignment
of
the remote
I/O
module
The inputloutput numbers
of
the
AX
systemareassigned
from
X/YOOO
to
W1
FF
inthe order of the station number
(1
to
64)
set
for each remote
110
module.
Data communication with
a
remote
I/O
module
is
performed
using inputs
(X)
and outputs
(Y)
assigned for each module.
See Section
4.7
for the relationshipbetween station numbers
and
I/O
numbers.
(2)
ON/OFF data communication with theremote
VO
module
The ON/OFF data communication with the remote
I/O
module
is
performed in the refresh mode.
Fig.
1.1
shows the data communication between the
AX
and
the remote
I/O
modules.
t
I
The
sequence
program
UWE
input
(X)
and
output
(Y)
numberstocontrolremote
UO
mod-
I
(b)
ONIOFF
data
of
output
(Y)
is
output.
/
(c)
ONlOFF
data
from
theinputmodule
istakenin.
MINI-S3
link
Station:nStation:
5
When the
A2C
is
running,operations
(a),
(b)
and
(c)
mentionedbelow are executed
repeatedly.
(a)
Thesequence program is executed from step
0
to END(FEND).
(b)
ON/OFF data of an output
(Y)
in
the sequence program
is
output by the MINI43 link.
(c)
ON/OFF data from an inputmodule
is
taken inbythe MINIS3 link.
Fig.
1.1
OWOFF
Data
Communication
between
th.
AZC
and
the
R.mote
I/O
Modukr
1
I
1
3
??
‘I’
1
1
1
1
r=
L
r=
L-
1.
INTR0DUCTK)N
/MELSEC-A
Input/output response time
The data communication response time bwteen the
A2C
and
theremote
VO
modules
is
as
described below.
c
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P
To
take
in an
ON/OFF
change from the input module,
1
scan
at
maximum
is
required.
When an output
ON/OFF
is
changed bythe sequence
program,
1
scan
at
maximum
is
required tooutput the
change to theoutputmodule.
When
ON/OFF
controlof theoutputmodule
is
done by
ONIOFF
data
of
the input module,
2
scans
at
maximum are
required
till
the
ON/OFF
status oftheoutputmodule
changesafter an
ON/OFF
input changed.
1.
INTRoDuCTtoN
/MELSEC-A
1.1.2
Data
communication
betweem
the
A2CCPU
ad
theremote terminal module
(1)
Maximum number of remoteterminalmodules to be con-
nected
A maximum of
14
remote terminal modulescan beconnected
to the A2C.
(2)
Data communicationwith remoteterminalmodules
(a) Perform thefollowinginitial setting.
1)
The first station number of the remote terminal module
2)
Protocol
See Section
4.2.9
for details ofinitial setting.
(b) Executedata communication with the
FROM0
instruc-
tion.
See the ACPU ProgrammingManual (Common Instruc-
tions)for details ofthe FROM/TO instruction.
(b)
Transmission
of
designateddata
by
executingTOinstruction
CPU
I
A
MINI-S3
link Remote
terminal
n
7-
Station number:
9
U
I
Station number: nStation number:
5
completesignal
Data communication with the remote terminal module is executed
as
describedbelow.
(a)
The
FROM/TO
and PRC instructions areexecuted bythe sequence program.
(b) Therequest to senddesignateddata
or
the data is transmittedby executing the
FROM/TO
instruction after executing the PRC instruction.
1)
At
FROM
instruction execution
:
Datasendrequest
2)
TO instruction
:
Datasending
A2C.
signal fromthe remoteterminalmodule.
(c) The remote terminal modulesends the completion signal ofdata sendor receiveto the
(d) The A2C turns
ON
the completesigna.1
(Ml)
when
it
received the sendreceive complete
Fig.
1.2
Data
Communhtion
between
the
Ax
and
the
Rmote
Terminal
Module
(3)
Response time
Communicationof
8
data with one
FROM/TO
instruction
requires approximately
400
ms (when scan time is 100 ms).
1
,?
1
1
1
1
I
1
I
4
"I
.-
1
3
I
7
1
i.1
-1
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The
A2C
has thefollowing features.
(1)
Compact
site
TheA2Chas compact outsidedimensions:
170
mm
(6.7
in)
(height)
X
100
mm
(3.9
in) (width)
X
80
mm
(3.1
in) (length)
Also,
the
A2CI/O
module has
a
short width of
64
mm
(2.5
in).
A2CCPU
NCVO
module
1
Fig.
1.3
AX
0-
Dimensions
(2)
512
pointsofinput/outputcontrol
The
A2C
is
capable of controlling input/output operationat
512
pointsspecified between
XPlO
and
WlFF.
(3)
A
maximum of
8K
stepscanbe contained in one program.
With sequence instructions, basic instructionsand application
instructions,
a
maximum of
8K
steps can be contained in one
sequence program. Also, microcomputer programsand utility
programs made
by
the user can be run in combination with
a
sequence program.
(4)
Cableconnection between modules
Cables designed exclusively forthe A2C or twisted pair shield
cablesareusedforconnection between the
A2C
and the
A2CI/O module and between the A2CWO modules.
When
the
I/O
modules
are
arranged
Me
by
side
1
AXVO
module
A2C
\
Cabte
1
When
the
UO
modules
are
arranged
apart
1
A2C
A2CVO
module
A2CI/O
module
7
d
rl
I
3
3
Rg.
1.4
Connection
of
the
Ax
Swan
i
-'
1
1-6
J
IB
(N4
682364
1.
INTRODUCTION
(5)
Connection withthe
MINI43
linkremote
I/O
modulesand
remoteterminalmodulesis possible.
TheA2C can be connected with the MINi-S3 link remote
I/O
modules, remote terminal modules anddisclose devices. (See
Section 2.3.1
.)
The A2CI/O modules, MINI-S3link remote
I/O
modules, remote
terminal modulesand disclose devices can be used together.
/I=
A2CCPU
Twisted-pair
cable
Remoteterminal
module
I
-1
E
module
Remote
UO
module
Fig.
1.5
Use
with
the
MINI-s3
Link
Modules
(6)
Vertical and horizontal positions and mounting on
a
flat base
are possible.
The A2C and A2CI/O modulescan beinstalled
in
three different
positions.
I1111
0
0
I
.....
I
VerticalHorizontal
Flat
base
~~ ~~~~
FQ.
1.6
Installng
Positions
of
the
Ax
and
A2CI/O
Modulw
(7)
Can be mountedtothe DIN rail.
The A2C
and
A2CUO
modules are usually mounted directly to
a
control panel
or
equipment to
be
controlled using screws. Using
the DIN rail adapter, however,the A2C modules can
be
mounted
to the DIN rail. (A clearance of
4
mm betweenmodules is
obtainedwhen the DINadaptersare mounted side
by
side
without leaving clearancebetweenthem.
(See
App.1.))
HOOK
for removing
themodulefrom
A2C
A2CUO
module
!
the
DIN
rail
DIN
rail
adapter
Fig.
1.7
A2C
and
A2CI/O
Modules
Mounted
to
the
DIN
Rail
1.
INTRODUCTlON
/MELSEC-A
1.3
GenW
Tmr
and
Abbreviations
General terms andabbreviationsused
in
this manual are
explained.
A2C
An abbreviation of the A2CCPU general-purpose programm-
able controller.
A2CUO module
A generalterm for the following
UO
modules whichare of the
same type as the A2CCPU.
a) 32-pointinputmodules
b) 32-point outputmodules
c) 32-point
I/O
modules
See
Section 2.3 for typeclassification of theA2CVO modules.
A2C
special functionmodule
Ageneral termforthefollowing special functionmodules
which are ofthe same type as the A2CCPU.
a)
High speedcounter module
b) Analog-digitalconversionmodule
See Section 2.3 fortype classification ofthe A2C special
function modules.
MINI-S3 link
An abbreviation of theMELSECNET/MINI-S3 data link system.
Peripheral devices
A
general termfor A6GPP,AGPHP,A6HGP and A7PU.
Remote
UO
module
Ageneral termforthefollowing modules.
a)
A2CI/O modules
b)
MINI43 linkremote
UO
modules
1)
Out-of-panel typeremote
I/O
modules
2) Compact typeremote
I/O
modules
3) AJ72PT35 typelinkmodule
4)
MELSEC-Fseries programmablecontrollers
5) Mitsubishi general-purpose inverters
6) Manifoldsolenoid valves
See Section 2.3 for type classification of A2CI/O modules
andapplicableMINI-S3 linkremote
I/O
modules.
Remote module
A general term for remote
UO
modules and remote terminal
modules.
Remote terminalmodule
A general term for theA2C special function modules and the
MINI43 linkremote terminal modules.
See Section 2.3 for type classification of A2C special function
modules
and
applicable MINI-S3 linkremoteterminalmod-
ules.
1-8
18
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1.
INTRODUCTION
/MELSEC-A
1.4
Referbnco
Mmuals
Refer to
the
manualslistedbelow to use
the
A2C.
(1) ACPU ProgrammingManual (Fundamentals): IB(NAl-66249
For details of the programming method,devices, parameters
and kind of program necessary for
the
programming for the
A2C.
(2) ACPU ProgrammingManual(Commoninstructions):IB(NA)-
66250
For details of operation by thesequence instructions, common
instructions and application instructionsfeasible with theA2C.
(3) A2CI/O Module User's Manual: IB(NAl-66236
For specifications and outside dimensionsofthe A2CI/O
modules.
(4)
MELSECNETMINI-S3 Batch RefreshType Remote
I/O
Module
User's Manual: IB(NA)-66215
For specifications andhandlingof the batch refresh type
remote
I/O
modules.
(5) AJ35PTF-R2 Type RS-232C Interface Module User's Manual:
For specifications and handlingforcommunicationwith
calculators usingthe RS-232C interface module.
IB(NA)-66219
(6)
Special Function ModulesManual
Forspecifications, handlingandprogrammingfor speciat
functionmodules used.
(7)
MELSEC-F Series ProgrammableControllersManual
Forspecifications, handling and programmingforthe
MELSEC-F series PCs.
(8)
FR-Z2OO SeriesGeneral-Purpose Inverters Manual
For specifications and handling of the
FR-ZZOO
series general-
purpose inverters.
2,
SYSTEM
CONRGURAflON
/MELSEC-A
2.
SYSTEM
CONflGURATlON
?
2.1
Overall
Configuration
,'
--
I
cw
module
I
I
DIN
adapter
I
L
II
II
L
L
For
24
VDC
power
supply
remote
br0
module
remoteterminal
Twistedpair
shield
cable
1
I
41r!
I
ra
..-'
'n
'Y
2.
SYSTEM
CONFIGURATION
/MELSEC-A
Audio
recorder
+=
writer unit
‘2
95
writer
pLl
keyboard
system disk
‘4
c
Printers:
KGPR,
K?PR,
A7PR,
general-
purpose
printer
KGPR-K,
GT-10,
k==
user disk
SW4GP- GPPAEE
systemdisk
n
‘4
r-
SWO-FDC
clesning disk
hI
intelligent
A6GPPE
~
I
GPP
,-xq
composite
I
videocable
I
El
keyboard
I
REMARK
1
1)
See
App.
4
forrestrictionsforuseof
*I
to
‘5.
2)
See Section
5.3
for specifications of 5-core flat cables and twisted pair cables
*.
2-2
18
INAi
66238A
2.
SYSTEM
CONFIGURATION
-/MELSEC-A
2.2
Notes
on
System Construction
(1) Connection
of
remote
I/O
modulesandremoteterminal
modules
A maximum
of
64
stations
of
remote
I/O
modules and remote
terminalmodules canbeconnected to the A2C.
Also, the MINI-S3 link disclose devices can be connected. (See
Section2.3.)
(2)Applicableremoteterminalmodules
A
maximum
of
14 remoteterminalmodulesamongthose
mentionedbelow can be connected to the A2C. However,
when only theAJ35PTF-R2 RS-232Cinterface module is used,
upto
7
modules canbeconnected.
a)
A68ADC NDconversion module
b) AD61C high speedcounter module
c) AJ35PTF-R2RS-232C interface module (no-protocol mode
only)
(3) Use
of
the MINI43 linkmodules
The following restrictions are applied when the MINI-S3 link
remote
I/O
modules and remote terminal modules are used.
a) Twisted pair data linkmodule:
No
restrictionis applied.
b) Opticalltwistedpair data linkmodule:
Usable when theoptical data linkmoduleis
used.
c) Optical data linkmodule:
Usable when the opticalhisted pair data link
module is used as the optical data link module.
Twistedpairshieldcable Twistedpairshield
cable
A2CCPU
(A):
Twisted pair data link module
(8):
Opticalltwistedpairdata
link
\
I
Opticalfiber
cable
module
(C):
Opticaldatalinkmodule
Fig.
2.2
Cunnoction
of
the
MELSECNET/MINt-S3
Moduk.
P
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..
..
c...
r
I
L....
c
c.
r
(-'
c-
ii.
p
c
2.SYSTEM
CONFIGURATON
/MELSEC-A
(4)
Power supplyforthe
A2CVO
module and the
A2C
special
functionmodules
The
A2CVO
modules and the
A2C
special function modules
require
24
VDC
power supply. Use the
A66PC
power supply
module or
a
general-purpose
24VDC
powersupply.
(5)
Both remote
I/O
modules and remote terminalmodules, when
used with the
A2C,
need station number setting.
If
two
or more different modulesare
set
for one same station
number, incorrect inputand output willoccur. Make sure that
there are no moduleswhich are
set
for onesame station
number before thepower
is
turned
ON.
See Section
4.7
for details ofstation setting.
(6)
To
eliminate incorrect input
at
the remote
I/O
modules, design
the
A2C
system consideringthe following.
a)
Measures on turning
ON
and
OFF
thepower
1)
When turning
ON
the power, turn
ON
theremote
I/O
modules first, and then, turn
ON
the
A2C.
Or, turn
ON
the
A2C
and the remote
I/O
modules together
at
the
same time.
2)
When turning
OFF
the power, turn
OFF
the
A2C
first, and
then, turn
OFF
the remote
I/O
modules.
Or,
turn them
OFF
together
at
the same time.
Power supply for theremote
110
modulesindicates thefollowing.
1)
UO
module power supply: Power supplied to the
WO
moudle power supply is
converted to
5
VM:
inside the system and usedinthe internal circuitof the
I/O
module.
2)
Input external power supply:Powersupply forinputmodules
3)
Outputexternalpowersupply: Power supply foroutputmodules
See the followingmanualfor details.
A2WO
Module User's Manual
P
c..
2.
SYSTEM
CONffiURATION
/MELSEC-A
b)
Measures againt momentary power failure for the
1/0
module
Momentary power faiture of the power supply of the
I/O
module may cause incorrectinput.
1)
Cause for incorrectinput due to momentarypower
failure
The
VO
modulehardwareconvertsthe
I/O
module
powersupply
(24
VDC) to
5
VDC
insidethemodule.
If momentary power failure occurs in the
1/0
module,
incorrect input occurs if
I10
refresh
is
executed within
duration (A)shown below because: (Time from occurr-
ence of external power supply
OFF
to turning
OFF
of
internal 5VDC)
>
(ON
to
OFF
response time of input
module).
External supply
24
VDC
(for
WO
module power supply and input
externalpowersupply)
Inside
5
VDC
ON
OFF
Input(Xn)
I
1
OFF
1
I
L-4
When the input external power supply
is
turned
off,
input(Xn)turns
off
afterthe
ON-OFF
response'time
of
theinputmodule.
2)
Prevention of incorrectinput
Connect the A2C,A66PC, stabilized power supply and
AC inputto onesame power supply.
I
I
I
I
Inputmodule
WO
modute
+
,
Stabilized
powersupply
l..-_______l.
24
VDC
powersupply
A66PC
L
--
4--
-
1
Inputexternal
powersupply
A2CCPUTwistedpair
cable
Inputmodule
i
I
I
-\
rl
I
I
Fig.
2.3
Pow
Supply
Wiring
Exmk
2-5
IB
(NAI
66238-A
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