9287500991 Rev K DECS-100 Introduction iii
REVISION HISTORY
The following information provides a historical summary of the changes made to the DECS-100
hardware, firmware, and software. The corresponding revisions made to this instruction manual
(9287500991) are also summarized. Revisions are listed in chronological order.
Hardware
Version and Date
•
F, 05/01
•
•
Began supplying mounting screws
• SIL-PADS were added between power components and the heat sinks
•
Added manufacturing origin to the rear label
•
Replaced transistor Q8B1 with an improved part
•
Incremental improvements to firmware and BESTCOMS
• Improved flash memory retention
• Redesigned current transformer
• Added front panel Underexcitation Limiting indicator
•
Enhanced EMI/RFI immunity
•
Version letter O not used
• Updated CD-ROM supplied with unit to include English and French
language instruction manuals
•
Version letter Q not used
•
Resolved UEL issue with firmware modification
S, 05/07
•
Provided German language manual on CD-ROM supplied with DECS-100
•
Released firmware version 2.13.XX
•
Improved power amplifier circuitry with more robust components
V, 03/08
•
Added Setpoint Auto Save feature
•
Released BESTCOMS version 1.08.XX.
•
Added enhancement for production testing.
Firmware
Version and Date
•
• Enabled the protection function during the first 5 seconds of operation
• Modified the OEL setpoint scale factor to be compatible with BESTCOMS
version 1.03.XX
• Added the scale factor for per-unit gain
•
Established minimum voltage regulation at 30% of nominal sensing voltage
1.12.XX, 03/02
•
Added register to detect CT type
• Added underexcitation limiting
• Added takeover-style excitation limiting
•
Added bus voltage matching provisions
•
Added Setpoint Auto Save setting
BESTCOMS for
Windows
®
OS
Version and Date
•
1.03.XX, 08/01
• Changed OEL scale from 100 to 1,000 to match the change in firmware
version 1.11.01
• Changed OEL default setting from 1 to 15
• Changed the default for all protection functions to enabled
•
Add support for French regional settings
•
Made BESTCOMS compatible with older firmware versions