5: U
SER
C
OMMUNICATION
I
NSTRUCTIONS
5-24
FC6A S
ERIES
M
ICRO
S
MART
A
LL
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IN
-O
NE
T
YPE
C
OMMUNICATION
M
ANUAL
FC9Y-B1730
User Communication via Serial Communication
With user communication via serial communication, the FC6A Series MicroSmart can send and receive data between external
devices connected to port 1 to port 3, such as a printer or barcode reader, by using the TXD (user communication transmit) and
RXD (user communication receive) instructions.
User Communication Overview
By installing a communication cartridge on the FC6A Series MicroSmart expansion communication port, the FC6A Series
MicroSmart can communicate with two external devices simultaneously.
When using an RS485 communication cartridge, FC6A Series MicroSmart modules can communicate with a maximum of 31 RS485
devices using the user communication.
User communication transmit and receive instructions can be programmed to match the communication protocol of the equipment
to communicate with. Possibility of communication using the user communication mode can be determined referring to the user
communication mode specifications described below.
A barcode reader is connected to port 1 of the FC6A Series MicroSmart.
User Communication Mode Specifications
Type
RS232C User Communication
RS485 User Communication
Communication Port
Port 1 to port 3
Port 1 to port 3
Maximum Nodes
1 per port
31 maximum
Standards
EIA RS232C
EIA RS485
Baud Rate
1,200, 2,400, 4,800, 9,600, 19,200, 38,400, 57,600, 115,200 bps (Default: 115,200)
Data Bits
7 or 8 bits (Default: 7)
Parity
Odd, Even, None (Default: Even)
Stop Bits
1 or 2 bits (Default: 1)
Receive Timeout
10 to 2,540 ms (10 ms increments) or none
(Receive timeout is disabled when 2,550 ms is selected.)
The receive timeout has an effect when using RXD instructions.
Communication Method
Start-stop synchronization system
Maximum Cable Length
5 m
200 m
Maximum Transmit Data
1,536 bytes
Maximum Receive Data
1,536 bytes
BCC Calculation
XOR, ADD, ADD-2comp *, Modbus ASCII *, Modbus RTU *
(* For calculation examples, see "BCC Calculation Examples" on page 5-49.)
RS232C Equipment
To Serial Port 1
FC6A Series MicroSmart
To RS232C Port
Attach a proper connector to the open
end of the cable referring to the cable
connector pinouts shown below.
User Communication Cable
FC6A-KC1C
5 m (16.4 ft.) long
Serial Port 1