Function Of Application Layer - Siemens SICAM P37 Manual

Communication

6.2.2 Function of Application Layer

6.2.2 Function of Application Layer
Read Data Command (function code 03 H)
• Down frame format
Communication
address (0-247)
• Response frame format
Communication
address (0-247)
• Example
- Down frame of 3-phase voltage data read
Device address
- Response frame
Device address
Preset Multi-Register Command (function code 10 H)
• Down frame format
Func-
Device
address
code
0-247
(10 H)
• Response frame format
Func-
Device
address
code
0-247
(10 H)
• Example
- Down frame when PT conversion ratio is 1234.5678 (hexadecimal notation of 12345678: 00BC 614EH)
Device
address
- Response frame
Device address
42
Function
High byte of
code
start address
of data
(03 H)
Function
Number of
code
bytes of data
length
(03 H)
03 H 10 H
03 H 06 H
High byte Low byte
of start of start
tion
address address
of vari- of vari-
able able
High
Low byte
byte of
of start
tion
start
address
address
of vari-
of vari-
able
able
10 H 00 H 03 H 00 H 02 H 04 H 00 H BC H 61 H 4E H Low check High check
10 H 00 H
Low byte of High byte
start address of length
of data of data
Content of Content of
data data
00 H 00 H
Data 1 Data 2
High byte Low
Byte
of vari- byte of
n of
able variable
data
number number
High Low
byte of byte of Low byte
variable variable of CRC
number number
03 H 00 H 02 H
SICAM P37, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C563-4, Release Date 06.2018
Low byte of
Low byte
length of
of CRC
data
Content of Low byte of
data CRC
03 H Low check
... Low check
Byte Byte Byte Low
1 of of n of byte of
data data data CRC
High byte
of CRC
Low check High check
High byte
of CRC
High byte
of CRC
High check
High check
High
byte of
CRC