Omron ZEN Communications Manual

SECTION 2 CompoWay/F Communications Protocol
14
2.2 Structure of Command Text
■ PDU Structure
• An MRC (Main Request Code) and SRC (Sub-Request Code) followed
by the various required data are transferred in the command text.
Service Request PDU
• The MRES (Main Response Code), SRES (Sub-Response Code),
followed by the data are transferred following the above MRC/SRC in
the response frame.
Service Response PDU (Normal Response)
• If the specified command text could not be executed, the service
response PDU will contain only the MRC/SRC and MRES/SRES.
Note: MRES/SRES provides the response code. MRES/SRES is not
output when processing ends in a normal completion.
Service Response PDU (Command Text Not Executed)
■ Addresses
An address is appended to each of the variable types. Express
addresses in 2-byte hexadecimal and append them for the specified
access size.
■ Number of Elements
Specify the number of elements as “0001” (fixed). The number of
elements is expressed in 2-byte hexadecimal.
MRC SRC
Data
MRES SRES MRC SRC
Data
MRES SRES MRC SRC

Omron ZEN Specifications

General

Display	LCD
Mounting Type	DIN Rail
Operating Temperature	-10 to 55°C
Power Supply Voltage	100-240V AC
Output Type	Relay, Transistor
Number of Outputs	4-8
Programming Language	Ladder Logic