Deleting a segment (command code ds) – Despatch Protocol 3 Modbus Communications User Manual
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DDRESS LIST
Modbus Programming Manual
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Version 2
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2.9.5.7. Deleting a Segment (Command Code DS)
The delete segment command deletes the specified segment from the specified profile. The
following segments are moved up one place in the profile (e.g. if segment 6 is deleted segment 7
now becomes segment 6).
Delete A Segment - Request (to instrument)
Field Name
Data
Comments
(Dec)
(Hex)
Unit Address
A/R
A/R
The ID address of the instrument
Function Code
23
17
Requires the multi read/write function
Read Start Address High Byte
32
20
Read Start Address Low Byte
06
06
Read Quantity Of Registers High
00
00
Read Quantity Of Registers Low
01
01
Write Start Address High
32
20
Write Start Address Low
06
06
Write Quantity Of Registers High
00
00
Write Quantity Of Registers Low
03
03
Byte Count
06
06
Command Code High Byte
68
44
Command Code Low Byte
83
53
Profile Number High Byte
A/R
A/R
Number of the profile that the segment
wants to be deleted from
Profile Number Low Byte
A/R
A/R
Segment Number High Byte
A/R
A/R
Number of the segment that wants to be
deleted
Segment Number Low Byte
A/R
A/R
CRC High Byte
A/R
A/R
CRC Low Byte
A/R
A/R
The instrument replies to this message with an Edit Response Message Section 2.9.5.9.
2.9.5.8. Getting the Number of Segments Remaining (Command Code SR)
Returns the number of unused segments remaining in the instrument. The number will be
between 0 and 255, depending on how many have been used in the profiles so far created.
Get Segments Remaining - Request (to instrument)
Field Name
Data
Comments
(Dec)
(Hex)
Unit Address
A/R
A/R
The ID address of the instrument as required
Function Code
23
17
Requires the multi read/write function
Read Start Address High Byte
32
20
Read Start Address Low Byte
06
06
Read Quantity Of Registers High
00
00
Read Quantity Of Registers Low
01
01
Write Start Address High
32
20
Write Start Address Low
06
06
Write Quantity Of Registers High
00
00
Write Quantity Of Registers Low
01
01
Byte Count
02
02