Structure Of Command/Response Text - Omron E5ZN Operation Manual

Structure of Command/Response Text

5-3 Structure of Command/Response Text
Command Text
Response Text
List of Services
The command/response text constitutes the main body of a command/
response frame. The structure of the command/response text is described
below.
The command text consists of the MRC (Main Request Code) and the SRC
(Sub Request Code), followed by the required data.
Node Sub-
STX No. address SID
02H "00" "0"
MRC SRC
2 2 bytes
The response text consists of the MRC and SRC, followed by the MRES
(Main Response Code), the SRES (Sub Response Code), and the required
data.
Node Sub- End
STX
No. address code
02H "00"
MRC SRC MRES SRES
2 2 2 2 bytes
If the Temperature Controller fails to execute a specified command, it gener-
ates a response consisting of the MRC, SRC, MRES, and SRES only.
MRC SRC Service name
"01" "01" Read from Variable Area
"01" "02" Write to Variable Area
"01" "04" Read from Multiple Vari-
able Area
"01" "13" Write to Multiple Variable
Area
"05" "03" Read Controller Attribute This service reads the model number
"06" "01" Read Controller Status
"08" "01" Echoback Test
"30" "05" Operation Commands
FINS-mini
command text
ETX BCC
03H
Data
FINS-mini
ETXBCC
response text
03H
Data
This service reads from the variable
area.
This service writes to the variable area.
This service performs non-consecutive
multiple reads from the variable area.
This service performs non-consecutive
multiple writes to the variable area.
and the communications buffer size.
This service reads the run status of the
Controller.
This service performs the echoback
test.
This service performs RUN/STOP, AT
Execute/Cancel, Move for Setting Area
1, etc.
Section 5-3
Description
67