Delta AH500 - Page 311

Chapter 8 Serial Communication Module AH10/15SCM
8-49
(2) Record types
The slave ID of the power meter is 5. All telegrams consist of one of three types of records.
These types of records are abbreviated records, control records, and full records. The use of
these record types is described below.
〈Abbreviated record〉
Character
number
Contents Description
1
16#10
Start bit
2
16#00…16#
FA, 16#FF
Instrument
address (IA)
3
Function field
(FF)
4
Checksum (CS)
(CS=IA+FF)
5
16#16
End mark
〈Control record〉
Character
number
Contents Description
1 16#68 Start bit
2 16#03 Length
3 16#03 Length (repeat)
4 16#68
Start bit
(repeat)
5
16#00…16
#FA, 16#FF
Instrument
address (IA)
6
Function field
(FF)
7
Parameter
index (PI)
8
Checksum
(CS)
(Summation of
the characters
starting from IA
to PI)
9 16#16 End mark
〈Full record〉
Character
number
Contents Description
1 16#68 Start bit
2 Length
3 Length (repeat)
4 16#68 Start bit (repeat)
5
16#00…16
#FA, 16#FF
Instrument
address (IA)
6
Function field
(FF)
7
Parameter index
(PI)
…
n character, data
block (DB)
Length+5
Checksum (CS)
(Summation of
the characters
starting from IA to
the last data
type)
Length+6 16#16 End mark
(3) Usage
AH10/15SCM-5A can communicate with the power meter through the three types of records.
Type
Telegram to the power meter
Response (via a record type)
1
Resetting the instrument
(via an abbreviated record)
None
2
Querying the status of the instrument
(via an abbreviated record)
Abbreviated record
3
Most important measured values and errors
(cyclic data)
(via an abbreviated record)
Full record
4
Event data for error analysis
(via an abbreviated record)
Full record