Zener MSC-3, Инструкция по эксплуатации

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IM00120
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IM00120
MSC-3 Start Up
WARNING regarding Essential Services Override
The Essential Services Override (ESO) feature provides a “run to destruction” mode
of operation for applications that justify this approach. For applications in which this
approach is not mandatory, the safety and other implications of the ESO operating
mode should be carefully considered in the light of alternative approaches before
choosing to use the ESO functionality of the MSC-3. It is fundamental to the ESO
mode of operation that all protection against overheating of the MSC-3 and the
associated motor is disabled. This may represent a fire or other hazard. Damage to
the MSC-3 due to overheating during ESO operation is not covered by warranty.
Equipment that has been exposed to ESO operation under conditions that may
have been outside the normal boundaries of rated operation should be inspected for
damage and internal component degradation prior to being returned to service in a
critical application. This inspection and any necessary repairs should be conducted
irrespective of whether the MSC-3 appears to be working normally or not. Only
competent personnel should undertake this work.
CAUTION
Any use of the Essential Services Override feature should be arranged to comply with
all local rules and regulations concerning the particular application.
Key ESO configuration parameters are:
• C034 ESO RAMP (function activation)
• F03 ESO Ref (reference selection)
• I08 ESO (input terminal selection)
Minimum Speed Idle Function
The minimum speed idle function will stop operation if the MSC-3 output frequency has been operating
with output frequency equal to
C010 MIN Hz
for a specified time interval. The time interval is specified
by
C011 IDLE DELAY.
The MSC-3 will restart operation when the reference exceeds the C012 Resume
Hz value. The diagram below illustrates the function. The conditions for the MSC3 to enter the idle state
are:
• MSC-3 output enabled (the “EN” terminal connected to “+5V” terminal).
• MSC-3 must not be tripped.
• Reverse is disabled (D05 Reverse).
• ESO is not active.
• The jog function is not active.
• No motor stop condition exists: ~STOP wiring in remote mode; STOP button in local mode.
• A run signal is given: FWD & LATCH wiring in remote mode; FWD push button press in local mode.
• The C18 Resume Hz value must be greater than the C01 MIN Hz value.
• The selected speed reference is lower than both C01 MIN Hz speed and the
• C18 Resume Hz value for the C17 Idle delay period.