ABB RELION REX640 Technical Manual page 1340

Supervision functions
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
Limit supervision
This module compares the motor run-time count to the set values of
and
counts exceed the levels.
The activation of the WARNING and ALARM outputs depends on the
mode setting. Both WARNING and ALARM occur immediately after the conditions are
met if
"Timed Warn", WARNING is activated within the next 24 hours at the time of the day
set using the
Warn Alm", the WARNING and ALARM outputs are activated at the time of day set
using
The function contains a blocking functionality. Activation of the BLOCK input blocks
both WARNING and ALARM.
6.6.5 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.
1340
Initial value setting.
Alarm value to generate the WARNING and ALARM outputs respectively when the
Operating time mode is set to "Immediate". If Operating time mode is set to
Operating time hour setting. If Operating time mode is set to "Timed
Operating time hour .
Operating time hour setting is used to set the hour of day in
The
Coordinated Universal Time (UTC). The setting has to be adjusted
according to the local time and local daylight-saving time.
1MRS759142 F
Warning value
Operating time
REX640
Technical Manual