Identification and Monitoring Data
Overview
The call mechanism in use for the Identification and Monitoring (I&M) functions are defined within the standard IEC 61158-6, chapter 6.1. The data structure of a call mechanism consists of DP-V1 header, call header, and the body.
Request
|
Definition |
Number of Bytes |
Value |
Comment |
Category |
|---|---|---|---|---|
|
FUNCTION_NUM |
1 octet |
5 Fh |
Indicates write fix |
DP-V1 header |
|
Slot number |
1 octet |
0 to 255 |
Variable |
|
|
Index |
1 octet |
255 |
Fix |
|
|
Length of net data |
1 octet |
68 (with body) |
Length of I&M data set |
|
|
EX-TENDED_FUNCTION_NUM |
1 octet |
08 h |
Indicates CALL fix |
Call header |
|
Reserved |
1 octet |
0 h |
Fix |
|
|
IM_INDEX |
2 octets |
65000 to 65199 |
Reserved for I&M |
|
|
IM_FUNCTION |
64 octets |
In accordance with the definition |
I&M3 descriptor |
Body |
Response
|
Definition |
Number of Bytes |
Value |
Comment |
Category |
|---|---|---|---|---|
|
FUNCTION_NUM |
1 octet |
5 Eh |
Indicates read fix |
DP-V1 header |
|
Slot number |
1 octet |
0 to 255 |
Variable |
|
|
Index |
1 octet |
255 |
Fix |
|
|
Length of net data |
1 octet |
68 (with body) |
Length of I&M data set |
|
|
EX-TENDED_FUNCTION_NUM |
1 octet |
08 h |
Indicates CALL fix |
Call header |
|
Reserved |
1 octet |
0 h |
Fix |
|
|
IM_INDEX |
2 octets |
65000 to 65199 |
Reserved for I&M |
|
|
IM_FUNCTION |
64 octets |
In accordance with the definition |
I&M3 descriptor |
Body |