Minilinkfeatures - Mitsubishi MELSEC-A AJ71PT3 User Manual

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1. INTRODUCTION
1.1 MINI Link Features
IMELSEC;4
The MINI link is a remote 1/0 system which uses the master
module on the main or extension base unit.
This system is designed to reduce wiring work costs for 1/0
devices installed away from the PC CPU.
For example, remote 1/0 stations installed to a conveyor line,
machines and equipment, etc. can be controlled from the master
module via optical fiberltwisted pair cables.
(1) Max. 512 link points
One master module allows up to 64 remote 1/0 stations to be
connected and up to 512 inputsloutputs to be controlled.
The number of master modules loaded is not limited.
(2) Fast 1/0 refresh
The I/O refresh time between the master and remote 1/0
stations is between 3.2 and 3.9ms for 512 points.
(3) 1/0 refresh system
A batch or a partial refresh system is available in accordance
with the remote 1/0 unit used.
(a) Batch refresh
Remote 1/0 station data is transferred by one 1/0 refresh. 8
input or output points can be controlled by a remote 1/0
unit which occupies 1 station.
(b) Partial refresh
Remote 1/0 station data is transferred by several 1/0
refreshes. This system allows many 1/0 points to be
controlled by a few occupied stations, e.g. 64 input and 64
output points can be controlled by the AJ35PTF-128DT
which occupies 4 stations.
(4) Remote 1/0 unit types
The following remote 1/0 units and module are available:
(a) Stand-alone remote 1/0 unit
Has a high-strength, drip-proof casing made of aluminum
diecast for installation onto a machine and may be used as
a relay box.
Its protective structure conforms to IP54G (JEM1030).
(b) Compact remote 1/0 unit
Same in style as the AOJ2 1/0 units. Models available are
32-point dedicated input, 24-point dedicated output, 16-
point input/12-point output and 32-point input/24-point
output compound units.
(c) Partial refresh type remote 1/0 unit
Refreshes remote 1/0 station data in groups of given
points. Allows many I/O points to be controlled with a few
stations occupied by the master module.
(d) AJ72PT35 link module
Allows the A series building block type 1/0 modules to be
used in the MINI link system.
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