User Manual

ProVU4 Controller, Profiler & Recorder/Controller - Product Manual
59407, Issue 1 – March 2008 Modbus Parameters Page 123
Read Profile Header - Response (from instrument)
Field Name Data Comments
(Dec) (Hex)
Profile Starting Setpoint High 00
00
Profile Starting Setpoint Low
A/R A/R
0 = Current Setpoint, 1 = Current Process
Variable Value
Profile Recovery High Byte 00
00
Profile Recovery Low Byte
A/R A/R
0 = Control to off, 1 = Restart profile,
2 = Maintain last profile setpoint
3 = Use controller setpoint, 4 = Continue
profile from where it was when power failed
Profile Recovery Time (Byte 4 - high)
Profile Recovery Time (Byte 3)
Profile Recovery Time (Byte 2)
Profile Recovery Time (Byte 1 - Low)
Floating point number
Profile Abort action High Byte 00
00
Profile Abort Action Low Byte
A/R A/R
0 = Control to off
1 = Maintain last profile setpoint
2 = Use controller setpoint
Profile Cycles High Byte
A/R A/R
Profile Cycles Low Byte
A/R A/R
1 to 9999 or 10,000 for “Infinite”
CRC High Byte
A/R A/R
CRC Low Byte
A/R A/R
Read A Segment
Read A Segment - 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 Byte 00 00
Read Quantity Of Registers Low Byte 11 0B
Write Start Address High Byte 22 16
Write Start Address Low Byte 06 06
Write Quantity Of Registers High Byte 00 00
Write Quantity Of Registers Low Byte 03 03
Byte Count 06 06
Command Code High Byte 82 52
Command Code Low Byte 83 53
Profile Number High Byte
A/R A/R
Profile Number Low Byte
A/R A/R
Segment Number High Byte
A/R A/R
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 the Read A Segment request as follows: