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Section 6
1MAC050144-MB C
Supervision functions
476
615 series ANSI
Technical Manual
output is the total duration for which
POS_ACTIVE
is active. The unit of time duration
count for
OPR_TIME
is hour. The value is available through the Monitored data view.
The
OPR_TIME
output is a continuously increasing value and it is stored in a non-volatile
memory. When
POS_ACTIVE
is active, the
OPR_TIME
count starts increasing from the
previous value. The count of
OPR_TIME
saturates at the final value of 299999, that is, no
further increment is possible. The activation of
RESET
can reset the count to the
Initial
value
setting.
Limit Supervision
This module compares the motor run-time count to the set values of
Warning value
and
Alarm value
to generate the
WARNING
and
ALARM
outputs respectively when the counts
exceed the levels.
The activation of the
WARNING
and
ALARM
outputs depends on the
Operating time mode
setting. Both
WARNING
and
ALARM
occur immediately after the conditions are met if
Operating time mode
is set to “Immediate”. If
Operating time mode
is set to “Timed
Warn”,
WARNING
is activated within the next 24 hours at the time of the day set using the
Operating time hour
setting. If
Operating time mode
is set to “Timed Warn Alm”, the
WARNING
and
ALARM
outputs are activated at the time of day set using
Operating time
hour
.
The function contains a blocking functionality. Activation of the
BLOCK
input blocks both
WARNING
and
ALARM
.
6.8.5
Application
The machine operating time since commissioning indicates the use of the machine. For
example, the mechanical wear and lubrication requirement for the shaft bearing of the
motors depend on the use hours.
If some motor is used for long duration runs, it might require frequent servicing, while for
a motor that is not used regularly the maintenance and service are scheduled less
frequently. The accumulated operating time of a motor together with the appropriate
settings for warning can be utilized to trigger the condition based maintenance of the
motor.
The operating time counter combined with the subsequent reset of the operating-time
count can be used to monitor the motor's run time for a single run.
Both the long term accumulated operating time and the short term single run duration
provide valuable information about the condition of the machine and device. The
information can be co-related to other process data to provide diagnoses for the process
where the machine or device is applied.
The
Operating time hour
setting is used to set the hour of day in
Coordinated Universal Time (UTC). The setting has to be adjusted
according to the local time and local daylight-saving time.
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