West Control Solutions ProVU 4 - Manual (Page 126)

ProVU4 Controller, Profiler & Recorder/Controller - Product Manual
59407, Issue 1 – March 2008 Modbus Parameters Page 125
Segment Data
The Segment Data is included in the response to a Read Segment request. It is provided in
two parts (Segment Info A and B).
The meaning of the data contained in Segment Info A and B depends on the type of segment
it relates to. Null is shown for unused data, this can be any value.
Segment Info Segment
Type
A B
Description
Ramp Time Time Target setpoint Ramp to the target setpoint “B” in the time “A”
Ramp Rate Ramp rate Target setpoint Ramp to the target setpoint “B” at the ramp rate “A”
Step Null Target setpoint Step to a target setpoint “B”
Dwell Dwell time Null Stay at the current setpoint for a period of time “A”
0 = Operator Null Wait for the operator to release the hold
1 = Time of day Start Time Wait until time of the day “B” in seconds since
midnight. (recorder only).
2 = Aux A digital
input Null Wait for digital input A signal
Hold
3 = Aux B digital
input Null Wait for digital input B signal
Loop Number of times to
repeat 1 to 9999 Segment number Loop to the specified segment number “B” from this
point. Repeat this “A” times. Only segments below
the current segment can be entered. Two loops
must not cross each other.
Join Null Profile number On completion of this profile jump run profile “B”
0 = Control off Null Turn off all control outputs.
1 = Maintain profile
setpoint Null Stay at the final setpoint of the profile
End
2 = Use controller
setpoint Null Use the active controller setpoint.
0 = Outputs off Repeat the profile sequence number “B” times,
then turn off the control outputs
1 = Maintain profile
setpoint Repeat the profile sequence number “B” times,
then hold the last profile setpoint.
Repeat
Sequence
Then End
2 = Use controller
setpoint
Number of times to
repeat sequence
Repeat the profile sequence number “B” times,
then use the active controller setpoint.
Read Profile Name
This command returns the name of the profile defined by the profile number requested.
Read Profile Name - 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 08 08
Write Start Address High Byte 32 20
Write Start Address Low Byte 06 06