Section 6 Communication (CompoWay/F)
6-2
Communication
(CompoWay/F)
6.1 Communication method
■ CompoWay/F communication protocol
The communication function is
used by creating a program on
the host computer. As such,
the explanations in this section
are from the perspective of the
host computer.
For example, "Read/Write"
refers to the host computer
reading or writing to the E5AR/
ER.
CompoWay/F is OMRON's unified protocol for general purpose serial
communication. Featuring a unified frame format and commands that
are compliant with FINS, which has a record of successful use with
OMRON programmable controllers, CompoWay/F makes communi-
cation easy between multiple components and a computer.
FINS (Factory Interface Network Service)
This is a protocol for message communication between controllers on
an OMRON factory automation network.
■ Communication
specifications
* Initial settings are shaded.
■ Transfer protocol
(Communication/
CompoWay/F)
The host computer sends a command frame, and the E5AR/ER sends
a response frame based on the content of the command frame. One
response frame is sent in response to one command frame.
The exchange between the command frame and response frame is
explained below.
After a receiving a response from the controller, have the host
computer wait at least 5 ms before sending the next command.
Supplement
Transfer connection: Multi-point
Communication method: RS-485 (2-wire half duplex)
Synchronization method: Start-stop
Baud rate: 9.6 k/19.2 k/38.4 k bit/s
Send code: ASCII
Data length: 7/8 bits
Stop bit length: 1/2 bits
Error detection: Vertical parity (None/Even/Odd)
BCC (Block Check Character)
Start-stop synchronized data configuration
Flow control: None
Interface: RS-485
Retry function: None
Response
frame
Command
frame
Response
frame
Command
frame
Host computer
E5AR/ER
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