Schweitzer Engineering Laboratories SEL-749M, Instruction Manual

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1.7
Date Code 20080918 Instruction Manual SEL-749M Relay
Introduction and Specifications
Getting Started
If a communications card with Modbus RTU protocol is present, then the
status report depicted in
Figure 1.2 applies. Where Figure 1.2 and Figure 1.3
show
OK/FAIL
,
OK/WARN
, or
Enabled/Disabled
, an actual report shows
OK
,
FAIL
,
WARN
,
Enabled
, or
Disabled
only.
Table 7.47 provides the definition of each status report designator. The
beginning of the status report printout (see Figure 1.2 ) contains the relay
firmware identification string (FID) and checksum string (CID). These strings
uniquely identify the relay and the version of the operating firmware.
Setting the
Date and Time
DAT (Date Command)
Viewing the Date
Type DAT <Enter> at the prompt to view the date stored in the SEL-749M. If
the date stored in the relay is July 29, 2003 and the DATE_F setting is MDY,
the relay will reply:
7/29/2003
If the DATE_F setting is YMD, the relay will reply:
2003/7/29
If the DATE_F setting is DMY, the relay will reply:
29/7/2003
Changing the Date
Type DAT followed by the correct date at the prompt to change the date stored
in the relay. For example, to change the date to May 2, 2003 (DATE_F =
MDY), enter the following at the action prompt:
DAT 5/2/03
You can separate the month, day, and year parameters with spaces, commas,
slashes, colons, and semicolons.
TIM (Time Command)
Viewing the Time
Enter TIM at the prompt to view the time stored in the SEL-749M. The relay
will reply with the stored time. For example,
13:52:44
This time is 1:52 p.m. (and 44 seconds).
Changing the Time
Enter TIM followed by the correct time at the action prompt to change the
time stored in the relay. For example, to change the time to 6:32 a.m., enter the
following at the prompt:
TIM 6:32:00
You can separate the hours, minutes, and seconds parameters with spaces,
commas, slashes, colons, and semicolons.
Cleaning and
Decontamination
Use a mild soap or detergent solution and a damp cloth to carefully clean the
SEL-749 chassis when necessary. Avoid using abrasive materials, polishing
compounds, and harsh chemical solvents (such as xylene or acetone) on any
surface of the relay.
Courtesy of NationalSwitchgear.com