SKF Multilog On-Line System IMx-M User Manual page 133

Table 2-21: Sensor fail value behavior example 2.
Measured
Configured
Scale Min
Sensor fail
value
Scale Max
SKF Multilog On-Line System IMx-M
User Manual
Range according to the diagram above
A
(sensor fail)
Scale Min
Scale Min
Scale Max

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
–
Resetting a fault condition via the
condition monitoring module.
–
Writing to Modbus Register 261 or 265 as described in the section
Imported (Write Single) Modbus
–
@ptitude Observer over an Ethernet connection.

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 m/mils).
The Offset is configured in the selected engineering unit (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
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
and Configuration Example of a Piston Rod
Protection Module Configuration with IMx-M Manager
B C
(sensor fail)
Measured Measured
Scale Min Measured
Scale Max Measured
Digital
Local Display Keypad
Registers.
Local Display or over Modbus.
Protection
D E
(sensor (sensor
fail) fail)
Measured Scale Max
value
Scale Min Scale Min
value
Scale Max Scale Max
value
Channels.
on the
Piston Rod Drop
Drop.
2 - 113