Outline - Mitsubishi FX3U-USB-BD User Manual

FX Series PLC User's Manual - Data Communication Edition
Parallel Link
1.

Outline

This chapter explains the parallel link.
1.1 Outline of System
The parallel link allows connection between two FX PLCs of the same series to mutually link devices.
1) According to the number of devices to be linked, either pattern can be selected between the regular mode
and the high speed mode.
2) Data link is automatically updated between up to two FX PLCs.
3) The total extension distance is 500 m (1640' 5") maximum (when only the 485ADPs are used except,
when the 485BDs are used with FX
500 m (1640' 5") [50 m (164' 0") when 485BD is used]
FX PLC
+
Communication
equipment operating
in accordance with
RS-485
Master station
Bit devices
M800 to M899
M900 to M999
Word devices
D490 to D499
D500 to D509
The figure above shows the maximum number of linked devices. There are differences in the specifications and
limitation depending on the selected link pattern and FX Series.
(FX)/FX PLCs).
2 2C
System
2 units
Transfer direction
Important points and reference
.......
Number of linked units
....... Total extension distance
For specifications,
FX PLC refer to Chapter 2.
To check applicable
PLC models,
.......
refer to Section 1.3.
+
Communication
equipment operating For selection,
.......
in accordance with
refer to Chapter 3.
RS-485
For wiring,
.......
refer to Chapter 4.
Slave station
The number of linked
.......
Bit devices
devices can be selected
among two patterns.
M800 to M899
For details,
refer to Chapter 2.
M900 to M999
Word devices
D490 to D499
D500 to D509
1 Outline
1.1 Outline of System
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