ProVU4 Controller, Profiler & Recorder/Controller - Product Manual
59407, Issue 3 – May 2011
Modbus Parameters
Page 117
Instruction Sequence to read a profile
1. Use the command RP to read the profile header data
2. Use the command RS to read the 1
st
segment’s data
3. Use the command RS to read the 2
nd
segment’s data.
4. Repeat steps 2 and 3 until an end segment is reached.
The following rules apply when creating a profile over communications:
•
Profiles must always be terminated with an end segment.
•
Segments cannot be added after an end segment has been added.
•
All changes made to the selected profile are immediately saved in the instrument.
Creating Or Editing A Profile Header
Creating Or Editing A Profile Header - 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
01
01
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
19
13
Byte Count
38 or 40
26 or 28
38dec / 0x26hex if creating a profile at the
next available location.
40dec / 0x28hex if creating a profile at a
specified location, or editing a profile.
Command Code High Byte
67, 69 or
87
43, 45 or
57
Create Profile (CP) = 67dec / 0x43hex
Edit Profile (EP) = 69dec / 0x45hex
Write Profile (WP) = 87dec / 0x57hex
Command Code Low Byte
80
50
Profile Number High Byte
A/R
A/R
Note: The profile number is not included
in the message when creating a profile
at the next available position.
Profile Number Low Byte
A/R
A/R
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 etc
Note: Only valid characters from the
instruments supported character set
should be used
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