Omron SYSDRIVE 3G3JV, Руководство по связи

Страница: 28 / 45

Chapter 2
2-7
CompoWay/F Communications Procedures
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 field.
Service Request PDU
• The MRES (Main Response Code) and SRES (Sub-Response Code) are transferred in the
response frame following the MRC and SRC. Data is then transferred following the MRES and
SRES.
Service Response PDU (Normal Response)
• If the specified command text could not be executed, the service response PDU will contain only
the MRC, SRC, MRES, and SRES.
MRES and SRES will provide a response code other than a code for normal completion.
■
Area Definitions
Only the variable area is used.
■
Type Code (Variable Type)
The following tables show the variable area type codes.
The following table summarizes setup areas 0 and 1.
Area Description
Setup area 0 This area groups together the RUN Mode and Adjustment Mode.
Setup area 1 This is the area for the Initial Settings Mode.
MRC SRC Data
MRC SRC MRES SRES Data
MRC SRC MRES SRES
Variable type (1 byte)
MSB LSB
1 1 0 0 0 0
Access size
11: Double word
Area
0: Setup area 0
1: Setup area 1
Read/Write
0: Read only
1: Read/Write