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2 CompoWay/F Communications Procedures
2-2
Structure of Command Text
2-2-1
PDU Structure
An MRC (Main Request Code) and SRC (Sub-Request Code) followed by the various required data is
transferred to the command text.
• Service Request PDU
MRC SRC
The MRES (Main Response Code) and SRES (Sub-Response Code) are transferred to the
response frame following the above MRC/SRC. Data is then transferred following the MRES and
SRES.
• Service Response PDU (Normal Response)
MRC SRC
MRES SRES
If the specified command text could not be executed, the service response PDU will contain only the
MRC/SRC and MRES/SRES.
• Service Response PDU (Command Text Not Executed)
MRC SRC MRES SRES
MRES/SRES provides the response code. MRES/SRES are not output when processing ends in a
normal completion.
2-2-2
Area Definitions
Areas comprise only the variable area.
2-2-3
Type Code (Variable Type)
The following figure shows the variable area type code.
MSB
Access size
11: Double word
10: Word
The following table summarizes setup areas 0 and 1.
Area
Setup area 0
Setup area 1
The type code depends on the parameter. Refer to 3-1 Variable Area (Setting Range) List for details.
2 - 6
Data
Data
Variable type (1 byte)
0
0
0
0
Area
0: Setup area 0
1: Setup area 1
This area groups together the protect, manual control, operation, adjustment, and
monitor/setting item levels.
This area groups together the initial setting, communications setting, advanced
function setting, and calibration levels.
E5@D Digital Temperature Controllers Communications Manual (H225)
LSB
Read/Write
0: Read only
1: Read/Write
Description
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