Read a segment (command code rs) – Despatch Protocol 3 Modbus Communications User Manual
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Modbus Programming Manual
A
DDRESS LIST
Version 2
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Read Profile Header - Response (from instrument)
Field Name
Data
Comments
(Dec)
(Hex)
Profile Name Character 7
A/R
A/R
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 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
Profile Start Signal High Byte
00
00
0 = No delay, 1 = After delay, 2 = At
Time/day
Profile Start Signal Low Byte
A/R
A/R
Profile Start Time (Byte 4 - High)
Floating point number
Profile Start Time (Byte 3)
Profile Start Time (Byte 2)
Profile Start Time (Byte 1 - Low)
Profile Start Day High Byte
00
00
1 = Monday, 2 = Tuesday, 3 = Wednesday,
4 = Thursday, 5 = Friday, 6 = Saturday,
7 = Sunday, 8 = Monday to Friday,
9 = Monday to Saturday, 10 = Saturday And
Sunday, 11= All Week
Profile Start Day Low Byte
A/R
A/R
Profile Starting Setpoint High
00
00
1 = Current Process Variable Value
Profile Starting Setpoint Low
A/R
A/R
Profile Recovery High Byte
00
00
0 = Control to off, 1 = Restart profile,
2 = Maintain last profile setpoint,
4 = Continue profile from where it was when
power failed
Profile Recovery Low Byte
A/R
A/R
Profile Recovery Time (Byte 4 - high)
Floating point number
Profile Recovery Time (Byte 3)
Profile Recovery Time (Byte 2)
Profile Recovery Time (Byte 1 - Low)
Profile Abort action High Byte
00
00
0 = Control to off
1 = Maintain last profile setpoint
Profile Abort Action Low Byte
A/R
A/R
Profile Cycles High Byte
A/R
A/R
1 to 9999 or 10,000 for “Infinite”
Profile Cycles Low Byte
A/R
A/R
CRC High Byte
A/R
A/R
CRC Low Byte
A/R
A/R
2.9.5.11. Read a Segment (Command Code RS)
Read 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