C-3
FX Series PLC User's Manual - Data Communication Edition
Parallel Link
1 Outline
1.1 Outline of System
A
Common Items
B
N:N Network
C
Parallel Link
D
Computer Link
E
Inverter
Communication
F
Non-Protocol
Communication
(RS/RS2 Instruction)
G
Non-Protocol
Communication
(FX
2N
-232IF)
H
Programming
Communication
I
Remote
Maintenance
Apx.
Discontinued
models
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
2(FX)/FX2C PLCs).
.......
For selection,
refer to Chapter 3.
Communication
equipment operating
in accordance with
RS-485
Communication
equipment operating
in accordance with
RS-485
FX PLC
FX PLC
Master station Slave station
500 m (1640' 5") [50 m (164' 0") when 485BD is used]
.......
2 units
Number of linked units
Total extension distance
For specifications,
refer to Chapter 2.
Bit devices
M800 to M899
M900 to M999
Word devices
D490 to D499
D500 to D509
Bit devices
M800 to M899
M900 to M999
Word devices
D490 to D499
D500 to D509
.......
The number of linked
devices can be selected
among two patterns.
For details,
refer to Chapter 2.
.......
For wiring,
refer to Chapter 4.
++
Transfer direction
.......
To check applicable
PLC models,
refer to Section 1.3.
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.
Important points and reference
chapter/section
System
.......
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