User`s manual

7-30
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■ EA-PG port
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Communication specifications (EA-PG port) Communication specifications (EA-PG port)
Communication specifications (EA-PG port) Communication specifications (EA-PG port)
Communication specifications (EA-PG port)
[1] Communication method
This section describes how to communicate between a host computer (personal computer etc.) and a
PLC (the communication ports on the JW300).
- The PLC only responds to signals from the host computer. The PLC cannot send communication
requests to the host computer.
- A signal from the host computer to the PLC is referred to as a "command." A signal from the PLC to the
host computer is referred to as a "response."
∼
Expansion rack panel
I/O bus expansion adapter
(JW-32EA)
EA-PG port: RS-422A
Personal computer, etc.
(Usable when the support
tool is not connected)
No. of modules
connectable to
JW300
115200/76800/38400/19200/9600 bps
ASCII alphanumeric characters
Start bit : 1 bit
Data length : 7/8 bits
Parity bit : 1 bit (odd, even, or none)
Stop bit : 1/2 bits
Shielded twisted pair wire
Total length (Maximum): 1 km,
4 wire type (party line connection)
Max. 31 (1 : N connection)
Items
Specifications
RS-422A connection
Transfer line
Transfer rate
Data system
Used Characters
PLC01
PLC02
PLC03
Host computer
: Sending : Receiving