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4
Setting Up the MJ-4A & MJ-4B Control Panel
Power Factor,
Tap position,
To activate Events Logging, view Log Event; then select
ON. You must also define which events are to be logged.
To activate logging for a specific Event, view the appropri-
ate Event = data item, and select ON for that Event.
The Event logs contain the 1000 most recent events.
4.5.2
Interval Logging
The Interval Log records data at specific time intervals, as
defined in the <LOG SETUP> Menu. At the end of each
interval, the following readings are logged:
Interval Date, Time, and Interval ID
Present, max, min, and demand values for:
Vld
KW
KVA
Instantaneous value of Vsrc
Instantaneous value of Power Factor
Power Factor at KVAmax
Power Factor at KVAmin
Present, max, and min values for Tap Position
Total Operations
To activate Interval logging, view Log Interval; then select
ON.
To define the time between logs, view Interval; then spec-
ify the time as HHhrMMmin.
To reset the minimum and maximum values at the start of
each interval, view ResLogMinMax; then select ON.
Interval logging is synchronized to the time of day. Interval
logging occurs when "seconds" is zero. For 15 and 30
minute intervals, the MJ-4 logs data at even quarter and
half-hour increments, respectively. For a 1-hour setting,
the MJ-4 logs data on the hour. For 4 and 6-hour settings,
the MJ-4 logs data synchronized to 12:00:00 midnight.
The Interval logs contain the 1000 most recent intervals.
4.5.3
Clearing Event/Interval Log Data
To clear the entire Event Log, view the Clr Event Log item,
toggle to Y, then press the Save key.
To clear the entire Interval Log, view the Clr IntervLog
item, toggle to Y, then press the Save key.
32
Power (KW, KVAR, KVA),
Vsrc
Ild
KVAR
4.6
Password Security Protection—
the <PASSWORD> Menu
MJ-4 security allows unrestricted read access to any data
item while providing password security against changes
and resets.
4.6.1
Overview
MJ-4 password protection is a hierarchical system, con-
sisting of a "System Key" that provides a level of protec-
tion for the security system itself, and two Levels of
security for MJ-4 data items:
1.
A Level 1 password enables the change/reset func-
tion; if a valid Level 1 password is entered, any data
item (which is not further protected by Level 2) can
be changed or reset.
2.
A Level 2 password is associated with a specific
Menu. When a Menu is protected at Level 2, the
Level 2 password must be entered before changes/
resets can be made to data items within that Menu.
Entering any Level 2 password provides access to all Level
1 protected data items as well as to data items contained
in Menus that are protected by that specific Level 2 pass-
word. In other words, when a Level 2 (Menu) password
has been entered, the change/reset function is enabled for
any data item that is not protected by another Level 2
password.
Either Level can be activated independent of the other.
Security activation and password assignment are separate
functions. In other words, even though you have assigned
a password to a Level, password checking can be active or
inactive for that Level.
With this flexible structure you can set up a security sys-
tem with:
•
A single Level 1 password.
•
A Level 1 password with additional Level 2 pass-
words for specific Menus.
•
No Level 1 password, but one or more level 2 (Menu)
passwords.
•
No passwords at all.
•
Passwords defined, but password checking tempo-
rarily disabled.
The default configuration for the password security sys-
tem is with all password protection disabled (except for
the <DIAGNOSTIC> Menu).
Control of the security system requires the use of a "Sys-
tem Key, " which protects the changing of passwords and
the activation and de-activation of the two security Levels.
To ensure proper control of the MJ-4 security system, you
may wish to designate one individual as security adminis-
Siemens Energy, Inc.
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