ABB RELION Series, Technical Manual

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6.3.3 Functionality
The runtime counter for machines and devices function MDSOPT calculates and
presents the accumulated operation time of a machine or device as the output. The unit
of time for accumulation is hour. The function generates a warning and an alarm when
the accumulated operation time exceeds the set limits. It utilizes a binary input to
indicate the active operation condition.
The accumulated operation time is one of the parameters for scheduling a service on
the equipment like motors. It indicates the use of the machine and hence the
mechanical wear and tear. Generally, the equipment manufacturers provide a
maintenance schedule based on the number of hours of service.
6.3.4 Operation principle
The function can be enabled and disabled with the Operation setting. The
corresponding parameter values are "On" and "Off".
The operation of MDSOPT can be described using a module diagram. All the modules
in the diagram are explained in the next sections.
GUID-6BE6D1E3-F3FB-45D9-8D6F-A44752C1477C V1 EN
Figure 275: Functional module diagram
Operation time counter
This module counts the operation time. When
POS_ACTIVE
is active, the count is
continuously added to the time duration until it is deactivated. At any time the
OPR_TIME
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.
1MRS758755 A
Section 6
Supervision functions
REC615 and RER615 527
Technical Manual