A.2
SEL-749M Relay Instruction Manual Date Code 20080918
Firmware and Manual Versions
Firmware
➤ Added more resolution to %TCU in the MET T report.
➤ Settings-related changes:
➤ Changed RTC equations when RTC = AUTO.
➤ Changed default setting for COOLTIME to 84 minutes
➤ Added PROTOCOL and SLAVEID settings to Port 3 for
Modbus or SEL protocol selection.
SEL-749M-R104-V0-Z002002-D20060126 ➤ Added SEL-5010 Relay Assistant Software compatibility.
➤ Changed default value of frequency parameter from 0 to 60 Hz
for DeviceNet.
➤ Improved frequency tracking algorithm to make it robust.
➤ Corrected delay timer operation for LOADUP and LOADLOW
elements
➤ Corrected blocking of LOP function.
20060126
SEL-749M-R103-V0-Z002002-D20050623
➤ Corrected possible error condition when reading event reports. 20050623
SEL-749M-R102-V0-Z002002-D20041027
➤ Modified 50P and Undercurrent (Load Loss) element ranges.
➤ Added Loss-of-Potential function.
➤ Added Frequency in event reporting
➤ Lengthened passwords to 12 characters
➤ Added “Time to Reset” for lockout timer in Modbus map
(register 011B) and Meter T report.
20041027
SEL-749M-R101-V0-Z001001-D20040216
➤ Corrected timing for Curve method Starting element 20040216
SEL-749M-R100-V0-Z001001-D20031210 ➤ Original Firmware Release 20031219
Table A.1 Firmware Revision History (Sheet 2 of 2)
Firmware Identification (FID) Number Description of Changes Manual Date Code
Courtesy of NationalSwitchgear.com
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