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CompoWay/F Frame Structure
Send Standby Time
3-2
CompoWay/F Frame Structure
Command Frames
Response Frames
The send standby time is used to adjust the time required for the host to
switch from sending to receiving status. For the G3ZA, this adjusts the time
between creating a response after receiving a transmission and switching to
send status.
Host
Send status
Send
Receive status
G3ZA
Response created
If switching time will not cause problems, the send standby time can be short-
ened to reduce the communications time with the host.
The propriety OMRON communications protocol called CompoWay/F is used
as the communications protocol. Commands from the host and responses
from the G3ZA are sent in data packets called frames. The structures of the
command and response frames are shown below.
FINS-mini
SID
Node No.
STX
Subaddress
command text
02H
"00"
"0"
1
2
2
1
BCC calculation range
FINS-mini
STX
Node No.
Subaddress
End code
response text
02H
"00"
1
2
2
2
STX
Code that indicates the beginning of the communications
frame. Always set 02H.
Node No.
This number specifies the destination. This is the same as the
communications unit number set on SW1 and SW2.
Subaddress and SID These are not used by the G3ZA. Set them to all zeros.
FINS-mini
The text of the command. Refer to 3-6 Operation Command
command text
on page 19 for details.
ETX
Code that indicates the end of the communications frame.
Always set 03H.
BCC
This stores the result of the BCC calculation from the Node
No. to EXT.
FINS-mini
SID
Subaddress
STX
Node No.
command text
02H 30H 30H 30H 30H 30H 30H 35H 30H 30H 03H 36H
+
+
+
+
+
+
BCC = 30H
30H
30H
30H
30H
30H
indicates an exclusive OR.
+
Receive status
Receive
Receive
Send
Send status
Send standby time
BCC
ETX
03H
1
1
ETX
BCC
03H
1
1
BCC
ETX
+
+
+
35H
30H
30H
03H = 36H
Section 3-2
15
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