Badger Meter SRD/SRI Valve Positioners - Manual (Page 33)

CONFIGURATION / PARAMETER
Identifier Page
Most of the data on the Identifier page is not modifiable . This page
shows the factory-configured ID information of the SRD991, including:
• Device ID
• Firmware Version
• Serial Number
• Last Calibration
All white fields can be changed, such as Tag Number, Tag Name, Tag
Date and Message .
Device
This is a single-byte field that contains the positioner’s model code . For the SRD991, this must always be 36 decimal, and the
value is set at the factory . That code identifies the positioner to all possible hosts as a SRD991 .
Since the SRD991 positioner only responds to secure commands, a 5-byte Device ID is read during the initial handshake . All
other communications are done with this Device ID used to make sure that only the correct device responds to the particular
request . This ID includes 5 bytes defined as follows:
• Device’s Serial Number (2 bytes)
• Device’s Julian Date of Manufacture (2 bytes)
• Device (1 byte)
Last Calibration / Manufacturing Date
Positioners only respond to secure commands . This means that after the initial handshake is passed, everything else will
calculate a CRC based on the 5-byte Device ID that was read earlier . This ID includes 5 bytes defined as follows:
• Device’s Serial Number (2 bytes)
• Device’s Julian Date of Manufacture (2 bytes)
• Device (1 byte)
On fabrication, the date of manufacture is initialized . While the date is entered in normal form, 02-Sep-05, it is converted into a
2-byte field inside the positioner:
Firmware Revision
The two-byte field, firmware revision, is initialized at the factory on fabrication . It consists of two parts, the major revision
number and the minor revision number . For example, it might read v1 .108, where the major number is 1 and the minor is 108 .
Any bug reports should include this version number for quicker response .
Serial Number
This is a 2-byte field that forms the first part of the Device ID .
Positioners only respond to secure commands . This means that after the initial handshake is passed, everything else will
calculate a CRC based on the 5-byte Device ID that was read earlier . This ID includes 5 bytes defined as follows:
• Device’s Serial Number (2 bytes)
• Device’s Julian Date of Manufacture (2 bytes)
• Device (1 byte)
Configuration / Parameter
Page 33 August 2014 POS-UM-00011-EN-02