
Protection
Protection Module Configuration with IMx-M Manager
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SKF Multilog O
n-Line System IMx-M
User Manual
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Latching Sensor Fault:
In the event of a sensor fault being detected, this
option (when checked) will retain the fault condition until it is
acknowledged by the operator.
•
This fault can be acknowledged by either:
–
Selecting “Latching Alarms Reset” via a Digital Channels.
–
Resetting a fault condition via the Local Display Keypad on the
condition monitoring module.Measured value
–
Writing to Modbus Register 261 as described in the section
•
Piston Rod Drop:
This group of settings relate specifically to reciprocating
compressors.
•
The following sensor configuration settings are available:
–
Start Angle & Stop Angle
: Used in Triggered Mode and configured in
degrees relative to the trigger point to specify the part of the
revolution at which the measurement will be based.
–
Offset
: Measurement value offset for actual Piston Drop (in
µ
m/mils).
The Offset is configured in the selected engineering unit (
µ
m or mils)
and can be used to set the measurement to zero. This is done by
configuring the offset to the actual measurement value, obtained
either from the Local Display or over Modbus.
If offset is configured to a positive value the measurement will be
decreased with the value of offset. A negative offset value will increase
the measured value with the same amount.
–
Sensor distance Rod length:
The rod length and sensor distance are
used to translate the measured piston rod drop, at the sensor
position, into the actual piston drop at the piston center pin position.
–
For detailed information on Piston rod drop, refer to Piston Rod Drop
and Configuration Example of a Piston Rod Drop.
•
Calculation Help:
This is an optional feature for Other analog channel
type
only. This is to help with the calculation of sensitivity and zero level based
on the given sensor range (Min and Max). The calculated values are not
stored. For different sensitivity and/or zero level value, the new calculated
value must be generated via Calculation Help.