Despatch Protocol 3 Modbus Communications - Manual (Page 44)

A DDRESS LIST Modbus Programming Manual
44 Version 2
Copyright © 2012 by Despatch Industries.
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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