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1MAC050144-MB C
Section 6
Supervision functions
615 series ANSI
475
Technical Manual
6.8
Runtime counter for machines and devices, OPTM
6.8.1
Identification
6.8.2
Function block
Figure 253:
Function block
6.8.3
Functionality
The generic operation time counter function OPTM 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.
6.8.4
Operation principle
The function can be enabled and disabled with the
Operation
setting. The corresponding
parameter values are Enable and Disable.
The operation of the generic operation time counter can be described by using a module
diagram. All the modules in the diagram are explained in the next sections.
Figure 254:
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
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Operation time counter
MDSOPT
OPTS
OPTM
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