1. INTRODUCTION
--------------------
MELSEC-A
I
1.2
Features
The A2C has
the
following features.
(1)
Compact
size
(a)
The
A2C
has
compact
outside
dimensions:
170
mm
(6.69
in)(height) x 100 mm (3.94 in)(width) x 80 mm (3.15 in) (length)
(b) The A2CCPUP21/R21
data
link
module
has
compact
outside
dimen-
sions : 170 mm (6.69 in) (height) x 170 mm (6.69 in) (width) x 80 mm
(3.15 in)(length).
(c) The A2CI/O
module
has a short
width
of 64 mm (2.5 in).
A2CCPU
80
mm
(3.15
in)
170
mm
(6.69
in)
A2CCPUP21/R21
80
mm
(3.15
in)
170
mm
(6.69
in)
80
mm
(3.15
in)
170
mrn
(6.69
in)
A2CI/O
module
•
Fig.
1.3
A2C
Outside
Dimensions
(2) 512 points of
input/output
control
The A2C is capable of controlling
input/output
operation at 512 points
specified between
X/YO
and X/Y1FF.
170
mm
(6.69
in)
(3) A maximum of 8K steps can be contained in one program.
With sequence instructions, basic
instructions
and
application
instruc-
tions, a maximum of 8K
steps
can be
contained
in one
sequence
program. Also,
microcomputer
programs
and utility
programs
made by
the
user can be run in combination with a
sequence
program.
(4) Data link modules usable as master stations or local stations
The A2CCPUP21/R21 can be used as either
a master station or a local
station in
the
MELSECNET link system.
The A2CCPUP21/R21 cannot be used as
the
master station for
the
third
tier.
1-5
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