Rosemount 3095FB - Suggestions and Tips

Reference Manual
00809-0100-4837, Rev DA
May 2006
Rosemount 3095FB
www.rosemount.com
Section 3 Modbus Communication
Review the Modbus Protocol Guide for the Rosemount 3095FB Multivariable
Transmitter with Modbus Protocol, Revision F in the next few pages.
Use this document to determine which process variables and status bits you
wish to retrieve from the Rosemount 3095FB.
Suggestions and Tips We recommend that you review the Modbus Protocol Guide in the following
manner:
1. Read Sections 1–3 to gain an overview of how the Rosemount
3095FB implements the Modbus RTU protocol.
2. Read Sections 4–9 as needed to determine which Rosemount
3095FB registers will require read/write actions in order to meet your
process control needs.
NOTE
Be sure to consider Section 3: 8.0 in the Modbus Protocol Guide. The only
way to detect transmitter exceptions is by polling the registers described in
this section.
NOTE
Additional registers may be added to the Modbus Protocol Guide with future
software revisions and upgrades.
NOTE
The following functions are only available for Rosemount 3095FB
Transmitters with software revision 107 or greater:
- Configurable Floating Point Format (Section 3: 3.4)
- Scaled Integers (Section 3: 5.3)
- Duplicate Modbus Register Functionality including 32-bit floating
point registers (Section 3: 2.3.1)