Eaton MP-4000, Instruction Bulletin For Installing, Operating, And Maintaining

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Page 12-2
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IB02602002E MP-4000
The annunciator connects to terminals 17 and 18. With this connec
-
tion, an alarm occurs if the relay or its power supply fails. All other
problems the MP-4000 can actively report are alarmed in the same
manner.
However, if the MP-4000 is de-energized routinely in service, use the
alarm relay in Mode 1 and connect the annunciator to terminals 18
and 19 to avoid nuisance alarms.
The alarm condition is automatically cleared if the measurement caus
-
ing the condition falls below the alarm setting. At this time, the Alarm
LED and alarm relay reset.
All possible alarm conditions are listed in Table 12.1. Related probable
causes and solutions are also included in this table.
12.2.2 Trip Conditions
A trip condition operates the trip relay contact. Other contacts are
programmed to respond to the particular offending condition. These
conditions fall into two groups:
• The measurement is greater than the programmed setting
value. Start delays, and run or pickup delays, must expire
before the function can trip. The red Trip LED lights and
a message appears in the Display Window to assist the
operator.
• The MP-4000 may detect a malfunction, which is usually
external to the motor control – such as a broken report back
signal circuit from the machine or process. There are also
conditions that may be internal to the control system, such
as a bypass of the trip contact or an MP-4000 internal self-
monitoring failure (refer to Subsection 12.3).
Note that the STEX alarm is conditional. While the motor is running, it
is an alarm. If the motor is stopped before it clears, it becomes a trip.
Refer to Subsections 5.5.1 and 5.5.2.
Trip conditions have these features:
• A time tag and a listing of the metering values just prior
to the occurrence of a trip is stored in memory, and they
can be recalled by using the Log Mode Display (refer to
Table 4.5).
• For IOC and ground fault trips, the offending transient fault
over current values are saved in the log with the time tag.
• The Display Window automatically alternates between the
last item displayed and the cause of the trip condition. If two
or more trip conditions occur at the same time, the display
alternates between or among the menu item and the cause
of each trip.
• The internal trip relay is always actuated. The other three
output relays may be actuated, depending on the output
configuration settings and which specific trip occurred.
• The trip condition must be manually reset by pressing the
Reset pushbutton. The remote reset input (terminal 8), the
REMOTE INPUT or INCOM command, can also be used to
reset the trip condition.
NOTES:
A thermal-model trip (I2T trip) cannot be reset until the ther
-
mal bucket level drops (cools) below the I2T
alarm setting.
A trip caused by a jogging function (starts per time exceed
-
ed, anti-backspin timing, time between starts) is not cleared
by resetting, and counts down with the remaining time vis
-
ible on the display. The trip then clears itself.
Trip conditions from operating causes or motor problems are listed in
Table 12.2. Related probable causes and solutions are also listed in
this table.
NOTE:
If the MP-4000 is in the Program mode with the motor running
and a trip condition occurs, the unit exits the Program mode
without saving any setting changes that might have been en
-
tered in the scratch pad area up to that time. After diagnosing
the trip, the reprogramming task must be repeated. Note that
the relay was protecting the motor with only its old settings at
the time of the trip.
12.3 Troubleshooting the MP-4000
Troubleshooting the MP-4000 is straightforward. If the Operator Panel
is inoperative (either the LEDs and the Display Window are off or they
are not responding properly), check Table 12.3. When doing so, keep
in mind that the most likely and easy to check problems are listed first.
WaRNING
IF ThE MP-4000 IS REPlaCED, ThE USER MUST REPROGRaM
all SETTING ValUES FOR ThE SPECIFIC aPPlICaTION IN ThE
NEW UNIT. Do not aTTEMPT TO RESTaRT ThE MOTOR UNTIl
all ValUES aRE ENTERED aND ChECKED. DaMaGE TO
EQUIPMENT aND/OR PERSONal INjURy May OCCUR IF ThIS
PROCEDURE IS NOT FOllOWED.
The MP-4000 can prevent saving settings that are inconsistent with
proper protection. If a programming error of this type occurs, the User
cannot exit the programming mode by pressing the Prog pushbutton
(refer to Section 5.0.1, Conditional Setting Ranges, for more informa-
tion)
.
The MP-4000 performs continuous internal diagnostic checks. If
a malfunction is detected during a diagnostic check, the MP-4000
displays one of the messages listed in Table 12.4. The User setting
P12L16 determines whether the MP-4000 only alarms for these prob-
lems, or if it both alarms and trips the motor.
WaRNING
IF ThE USER haS a CRITICal PROCESS, ThE USER May
ChOOSE TO alaRM ONly, BUT IT IS ESSENTIal TO REPlaCE
ThE MP-4000 aS SOON aS POSSIBlE. aSSUME ThaT ThE UNIT
IS NOT PROTECTING ThE MOTOR IF ONE OF ThESE alaRMS
OCCUR. MaNUally MONITOR ThE MOTOR aND PROCESS
ClOSEly. DO NOT REly ON MP-4000 DISPlayS IN ThIS CaSE.
If the motor trips or alarms for one of these failures, the MP-4000 must
be replaced. Return the unit to the factory for repair. There are no
User service procedures.
12.4 Technical assistance
For information, technical assistance, referral to an authorized distribu
-
tor, or instructions for returning products for repair, contact Eaton’s
Power Management Applications Support at 1-800-809-2772, Option
4. Or visit www.eaton.com to access our searchable database that
provides self-help solutions with troubleshooting information. Select
the appropriate country in the drop-down box, and choose the Product
eXpert option on the following page.