Communication Module DVPSCM12/52-SL
DVP-PLC Operation Manual
43
(Abbreviated)
Word
number
Content Description
1 10h Start bit
2 0 … FAh, FFh Device address (IA)
3 Function code (FF)
4
Checksum (CS)
(IA+FF)
5 16h End marker
(Full)
Word
number
Content Description
1 68h Start bit
2 Length
3 Length (repeat)
4 68h Start bit (repeat)
5 0 … FAh, FFh Device address (IA)
6 Function code (FF)
7 Parameter index (PI)
… n word, data block
Length+5
Checksum (CS)
(Add from IA to the
previous item.)
Length+6 16h End marker
(Control)
Word
number
Content Description
1 68h Start bit
2 03h Length
3 03h Length (repeat)
4 68h Start bit (repeat)
5 0 … FAh, FFh
Device address
(IA)
6 Function code (FF)
7
Parameter index
(PI)
8
Checksum (CS)
(Add from IA to PI.)
9 16h End marker
(2) The usage
There are nine types of usage in which the SCM module communicates with the electricity meter
through the combination of three record types.
Type Instruction to the electricity meter Response (through the record type)
1
Reset
Abbreviated record
N/A
2
Query about the status of the device: abbreviated
record
Abbreviated record
3
Measured value and error (cyclic data)
Abbreviated record
Full record
4
Event data analyzed erroneously
Abbreviated record
Full record
5
Measured value
Control record
Full record
6 Output parameter: control record Full record
7 Status: control record Full record
8 Device specifications: control record Full record
9 Real-time timing data: Full record