Emotron EMX-B, Инструкция по эксплуатации

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24 Built-in functions
CG Drives & Automation 01-6048-01r3
3.3 Rotation monitor (DIP switch 6)
Two different kinds of rotation monitors can be selected. These are used to
secure that the belt is not damaged and in other case notify the user via Rotation
alarm.
The first, UltraRotoSense™ (patent pending) is a unique, ultra-sensitive method
for detecting light load variations w/o even affecting the set operating speed of
the motor using only smart built in software algorithm in the micro controller
(no external equipment needed).
The second method, external rotation monitoring is using a more traditional
solution with external sensor and magnet mounted on the heat exchanger. This
is an alternative to UltraRotoSense™ and may be used when applicable for e.g.
the very most light weight / smallest rotors.
The rotation monitors give alarms through operating indications (LED) and via
the alarm relay (external signal) See Table 1, page 10. The motor does not stop
with this alarm.
3.3.1 Internal UltraRotoSense
TM
Activated by setting DIP6 to Off.
DIP switch 6 (see chapter 3.9.2 page 30) in position “OFF” (downwards),
means that the built in UltraRotoSense™ algorithm is enabled.
This method is using the motor as a sensor which means that no external
hardware is necessary for belt detection. Further, it is designed to measure load
variations even without changing the operating speed which allows continuous
belt supervision (~every other minute). This allows a very fast alarm response in
case of broken belt which may be critical for the system operating in cold
outdoor temperatures. Further, since the operating reference speed is
maintained during the belt test it will not affect the heat recovery process/room
temperature.
UltraRotoSense™ belt testing is automatically activated every other minute in all
operating states with the exception of intermittent purge mode but only if the
motor current is below a value considered as a possible no-load condition.
The controller indicates that this sequence is initiated by setting both green and
red led on at the same time. During this test the current set point speed is
maintained. The test is ongoing only for as long as necessary to detect the
presence of a load (belt intact) but for a maximum of 40 seconds. The controller
then goes directly back to normal operation.