IDEC FC4A-C10R2 User Manual page 409

25: D
ATA
Introduction
This chapter describes the data link communication function used to set up a distributed control system.
A data link communication system consists of one master station and a maximum of 31 slave stations, each station com-
prising a 16- or 24-I/O type
enabled, the master station has 12 data registers assigned for each slave station, and each slave station has 12 data registers
for communication with the master station. Using these data registers, the master station can send and receive data of 6
data registers to and from each slave station. No particular program is required for sending or receiving data in the data
link communication system.
When data of inputs, outputs, internal relays, timers, counters, or shift registers are moved to data registers using the move
instructions in the user program, these data can also be exchanged between the master and slave stations.
The OpenNet Controller, MICRO
tion system.
The all-in-one 10-I/O type
Master Station
Data Link Specifications
Electric Specifications
Baud Rate
Synchronization
Communication Cable
Maximum Cable Length
Maximum Slave Stations
Refresh Mode
Transmit/Receive Data
Special Internal Relay
Data Register
Special Data Register
L C
INK OMMUNICATION
CPU module or any slim type CPU module. When the data link communication is
MicroSmart
3 3
, MICRO C , and FA-3S series PLCs can also be connected to the data link communica-
CPU module does not have data link communication capabilities.
MicroSmart
Slave Station 1
Compliance with EIA-RS485
19,200 or 38,400 bps
Start-stop synchronization
Start bit: 1
Data bits: 7
Parity: Even
Stop bit: 1
Shielded twisted pair cable, core wire 0.3 mm
200m (656 feet) total
31 slave stations
Separate refresh
0 through 6 words each for transmission and receiving per slave station
M8005-M8007:
M8080-M8116:
M8117:
D900-D1271:
D8069-D8099:
« FC4A M
communication control and error
communication completion for each slave station
communication completion for all slave stations
transmit/receive data
communication error code
S U ' M
ICRO MART SER S ANUAL
Slave Station 31
2
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