Despatch Protocol 3 Modbus Communications - Manual (Page 50)

A DDRESS LIST Modbus Programming Manual
50 Version 2
Copyright © 2012 by Despatch Industries.
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Read Profile Name - 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 Byte 00 00
Read Quantity Of Registers Low Byte 08 08
Write Start Address High Byte 32 20
Write Start Address Low Byte 06 06
Write Quantity Of Registers High Byte 00 00
Write Quantity Of Registers Low Byte 02 02
Byte Count 04 04
Command Code High Byte 80 50
Command Code Low Byte 78 4E
Profile Number High Byte A/R A/R Number of the profile to read
Profile 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 the Read Profile Name request as follows:
Read Profile Name - Response (from instrument)
Field Name Data Comments
(Dec) (Hex)
Unit Address A/R A/R The ID address of the instrument
Function Code 23 17 The multi read/write function
Byte Count 16 10
Profile Name Character 1 A/R A/R
The ASCII codes equivalent to each of the
16 characters of the profile name, e.g. :
A = 65dec / 0x41, B = 66dec / 0x42 etc
a = 97dec / 0x61, b = 98dec / 0x62
The space character (32dec / 0x20hex) is
used to fill any unused characters at the end
of the name.
Characters 9 to 16 are not used so can be
ignored.
Profile Name Character 2 A/R A/R
Profile Name Character 3 A/R A/R
Profile Name Character 4 A/R A/R
Profile Name Character 5 A/R A/R
Profile Name Character 6 A/R A/R
Profile Name Character 7 A/R A/R
Profile Name Character 8 A/R A/R
Profile Name Character 9 32 20
Profile Name Character 10 32 20
Profile Name Character 11 32 20
Profile Name Character 12 32 20
Profile Name Character 13 32 20
Profile Name Character 14 32 20
Profile Name Character 15 32 20
Profile Name Character 16 32 20
CRC High Byte A/R A/R
CRC Low Byte A/R A/R