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IB02602002E MP-4000
With RUN PGM, if the User reprograms the MP-4000 while the motor
runs, the relay continues to protect with the all the old settings. All
setting changes are stored in a scratchpad area and not immediately
used. Finally, when the reprogramming is nished, the User exits the
PROGRAM mode by pushing the Program button again (see
Section 4). Only at this moment does the MP-4000 recalculate its in-
ternal values and put the new settings into effect. Note what happens
when it does so:
The thermal-model accumulator bucket is dumped and
resets to 40°C (104°F).
Any active run delay timers are reset and must start timing
again.
All jogging functions are reset - time between starts, cold
starts, and starts per time limits are all cleared.
The MP-4000 remembers that it was in the RUN state when
the program mode was exited, and continues that state. The
transition function will not reset, or trigger a reduced voltage
starter to switch to reduced voltage.
5.12.7 Setting P12L7, Emergency Override Enable (EMRG EN or
EMRG DIS)
Select P12L7 if the emergency override button is enabled or disabled.
If enabled, an emergency override can be executed by pushing the
Emrg Override button behind the front panel security door. In any
case, an emergency override can be performed by a remote contact
connected to either of the discrete inputs DI1 or DI2 programmed as
EMG OVR, or via data communications from a PowerNet host. The
as-shipped setting is disabled.
Emergency Override allows a panic restart of a tripped motor with-
out completely disabling protection. When the override request is
received, the thermal-model accumulator bucket is drained to its initial
level of 40°C (104°F). Jogging limit counters and timing, including
antibackspin timing, are reset. Cold starts are fully restored.
The motor protection is now in the state it would be in if the motor had
been standing for a long time prior to the moment of the override. This
allows an immediate restart of the motor. The override can also delay
an impending thermal trip of a running motor. The emergency override
action is counted in the history record, and noted with its time tag in the
logbook record.
CAUTION
THE EMERGENCY OVERRIDE FUNCTION CLEARS AND RE-
STARTS ALL PROTECTIVE FUNCTIONS OF THE MP-4000. USING
THIS FUNCTION CAN DAMAGE THE MOTOR. USE IT ONLY FOR
TRUE EMERGENCIES, WHEN IT KNOWN WHAT CAUSED THE
TRIP. OVERRIDE PERMITS THE RISK OF MOTOR DAMAGE TO
AVOID AN EVEN MORE DANGEROUS PROCESS SITUATION
CAUSED BY THE TRIPPING OF THE MOTOR.
5.12.8 Setting P12L8, Set Real Time Clock Display (12-HOUR or
24-HOUR)
P12L8 selects the time display to be the 12-hour format (with AM or
PM) or the 24-hour (military time or international time) format.
5.12.9 Setting P12L9, Month (MONTH)
P12L9 sets the real-time clock month, 1 to 12.
5.12.10 Setting P12L10, Day (DAY)
P12L10 sets the real-time clock day of the month. The MP-4000 tracks
leap years to the year 2100.
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•
•
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5.12.11 Setting P12L11, Year (YEAR)
P12L11 sets the real-time clock year.
5.12.12 Setting P12L12 , Hour (HOUR)
P12L12 sets the real-time clock hour (0 to 23). Use 13 to 23 for set-
ting, even if the 12-hour AM/PM mode was selected above for display.
5.12.13 Setting P12L13, Minute (MIN)
P12L13 sets the real-time clock minute. Since the minute does not
update on its own while the relay is in program mode, make this the
last setting to adjust before exiting.
NOTICE
THERE IS NO SETTING FOR SECONDS. THE CLOCK SECONDS
ARE SET TO ZERO WHEN THE USER EXITS THE PROGRAM
MODE. TO SYNCHRONIZE THE SECONDS, SET THE MINUTE
VALUE AHEAD, AND EXIT (PRESS THE PROG BUTTON) AS THE
NEXT MINUTE BEGINS.
5.12.14 Setting P12L14, Date Display Format (M D Y or D M Y)
P12L14 selects a display of either MONTH DAY YEAR, or
DAY MONTH YEAR.
5.12.15 Setting P12L15, IMPACC Communications Mode (MP3 EN
or MP3 DIS)
To congure the MP-4000 to communicate in a manner limited to that
of the preceding MP 3000 product, choose MP3K EN. This is the
factory default setting. It is needed for operation with older IMPACC
host systems. To take full advantage of MP-4000 capabilities with a
newer PowerNet host, choose MP3K DIS. Refer to Section 10, Data
Communications, for more details. This setting has no inuence on
performance or protection behavior of the protective relay itself.
5.12.16 Setting P12L16, Internal Diagnostic Failure Action (RLYF
TRP, RLYF ALM. RLYF T+A)
P12L16 selects the action to take if any of the MP-4000 internal back-
ground self-monitoring programs detect a problem with the relay. The
factory setting is to trip and alarm. However, Users with critical pro-
cesses may prefer to set for alarm only so that the motor can continue
to run while maintenance personnel attend to the relay.
CAUTION
IF THE RLYF ALM SETTING IS CHOSEN, BE SURE TO CON-
NECT AN EFFECTIVE ALARM TO THE ALARM RELAY OUTPUT,
AND TEST IT PERIODICALLY. OTHERWISE, THE MOTOR RUNS
WITHOUT PROTECTION IF THE RELAY SUFFERS A HARDWARE
FAILURE.
5.12.17 Setting P12L17, INCOM Trip Enabled or Disabled (INCT EN
or INCT DIS)
P12L17 selects whether or not the MP-4000 accepts and executes a motor
trip command from a remote PowerNet or IMPACC operator via data com-
munications. This is dictated by security concerns and operating proce-
dures of Users who connect the MP-4000 to a facility control system.
5.12.18 Setting P12L18, Arm or Disarm Trip Relay (ARMED or
DISARMED)
This maintenance function blocks the MP-4000 trip output, while all
the tripping functions continue to operate internally. If DISARMED is
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