Despatch Protocol 3 Modbus Communications - Manual (Page 51)

Modbus Programming Manual A DDRESS LIST
Version 2 51
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2.9.5.13. Read Profile Memory Status (Command Code PS)
This command returns the status of the profile memory used. The response to this command is to
return a table of all the profile numbers that are in use. A value of 0x00 indicates that the profile
position is free and value of 0x01 indicates that the position is used by a profile. Using this
command in conjunction with the read profile name command will give a directory of profile
numbers to profile names.
Read Profile Memory Status - 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 32 20
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 01 01
Byte Count 02 02
Command Code High Byte 80 50
Command Code Low Byte 83 53
CRC High Byte A/R A/R
CRC Low Byte A/R A/R
The instrument replies to the Read Profile Memory Status request as follows:
Read Profile Memory Status - 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 64 40
Profile 1 Position 0 or 1 0 or 1 For each of the 64 possible profile positions,
a value of 0 is returned if the position is free,
or 1 if the position is empty.
Profile 2 Position 0 or 1 0 or 1
etc…..
Profile 63 Position 0 or 1 0 or 1
Profile 64 Position 0 or 1 0 or 1
CRC High Byte A/R A/R
CRC Low Byte A/R A/R