User Communication Via Serial Communication - IDEC FT1A Series User Manual

10: U C
SER
Introduction
This chapter describes user communication that converts the specified data to the data type for the external devices connected to
the SmartAXIS and sends and receives that data.
User communication allows the following two types of communication methods:
Serial communication with an external device connected to the RS232C port or the RS485 port
•
Ethernet communication with an external device connected by the Ethernet port
•

User Communication via Serial Communication

This section describes the user communication function for communication between the SmartAXIS and external devices with an
RS232C or RS485 port, such as a computer, modem, printer, or barcode reader. The SmartAXIS uses user communication
instructions for transmitting and receiving communication to and from external devices.
User Communication Overview
By installing a communication cartridge on the SmartAXIS expansion communication port, the SmartAXIS can communicate with
two external devices simultaneously.
When using an RS485 communication cartridge, SmartAXIS 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.
User Communication Mode Specifications
Type
Communication Port
Maximum Nodes
Standards
Baud Rate
Data Bits
Parity
Stop Bits
Receive Timeout
Communication Method
Maximum Cable Length
Maximum Transmit Data
Maximum Receive Data
BCC Calculation
Note: The following configuration cannot be selected: Data Bits: 7, Parity: None
OMMUNICATION
RS232C User Communication
Port 2 and Port 3
1 per port
EIA RS232C
1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps (Default: 115200)
7 or 8 bits (Default: 7) (Note)
Odd, Even, None (Default: Even) (Note)
1 or 2 bits (Default: 1)
10 to 2540ms (10ms increments) or none
(Receive timeout is disabled when 2550 ms is selected.)
The receive timeout has an effect when using RXD instructions.
Start-stop synchronization system
3m
200 bytes
200 bytes
XOR, ADD, ADD-2comp *, Modbus ASCII *, Modbus RTU *
(* For calculation examples, see "BCC Calculation Examples" on page 10-28.)
S AXIS P
MART
I
NSTRUCTIONS
/L U ' M FT9Y-B1378
RO ITE SER S ANUAL
RS485 User Communication
Port 2 and Port 3
31 maximum
EIA RS485
200m
10-1