2 Specification
2.4 Communication Specification
23
FX3U-16CCL-M User's Manual
1
Introduction
2
Specification
3
System
Configuration
4
Installation
5
Wiring
6
Introduction of
Functions
7
Data Link
Processing
Time
8
Parameter
Setting
9
Data Link
Procedure
10
Buffer Memory
2.4 Communication Specification
2.4.1 Data transfer between master station and slave station
Data is transferred using FROM/TO instructions via the buffer memory (or direct specification of buffer
memory) between the FX
3G/FX3U/FX3UC PLC and the FX3U-16CCL-M. Data is replaced with internal devices
(such as M, R and D), and used in sequence programs.
Cyclic transmission and extended cyclic transmission are available between the slave station and the
FX
3U-16CCL-M.
2.5 Maximum Transmission Distance
2.5.1 Maximum transmission distance (for Ver. 1.00)
This subsection describes the relationship between the transmission speed and the maximum transmission
distance.
1. In the system consisting of only remote I/O stations and remote device stations
*1. Cable length between remote I/O or remote device stations
*2. Cable length between the master station and an adjacent station
• CC-Link dedicated cable (requiring terminal resistor of 110 )
*3. The cable length between remote I/O stations or remote device stations is within this range and if
even one location is wired, the maximum overall cable distance will be as indicated above.
Transmission speed
Cable length between stations
Maximum transmission
distance
*1 *2
156 kbps
30 cm or more
1 m or more
1200 m
625 kbps 600 m
2.5 Mbps 200 m
5 Mbps
30 cm to 59 cm
*3
110 m
60 cm or more 150 m
10 Mbps
30 cm to 59 cm
*3
50 m
60 cm to 99 cm
*3
80 m
1 m or more 100 m
FX
3G
/FX
3U
/FX
3UC
main unit
FX
3U
-16CCL-M
BFM (Buffer memory)
RX : Remote input
RY : Remote output
RWw (Remote register)
RWr (Remote register)
Slave station
RX : Remote input
RY : Remote output
RWw (Remote register)
RWr (Remote register)
M (auxiliary relay) etc.
FROM
instruction
TO
instruction
FROM
instruction
TO
instruction
extension
bus
M (auxiliary relay) etc.
D (data resister) etc.
D (data resister) etc.
CC-Link
Cyclic/
Expanded cyclic
Remote I/O station
or remote device
station
Master station
Remote I/O station
or remote device
station
Remote I/O station
or remote device
station
Remote I/O station
or remote device
station
*2 *2 *1 *1
Maximum transmission distance