Page 25 - GuardII+ Series 4208 Platform EV User Manual

GuardII+ EV Card Operation

When a measurement is saved in due to a Resonance Trigger, it will have
this icon in EVView.

NOTE:
For a Resonance Trigger to occur, the load and temperature Operating
Conditions must be available either through a Remote I/O Unit or directly
through Modbus.
Additionally, a Shaft Trigger signal from the machine must be available to
reliably detect phase changes.

4.6.10. Looseness Trigger
This Trigger compares measurement data across multiple measurements to detect a
change in vibration that is indicative of looseness and resolves down to a specific input. This
means that looseness on input EV1 causes a different Trigger than looseness on input EV12;
each input has its own Triggers.
The Trigger interval for this Trigger is 30 days; additionally, the result must be confirmed
over multiple measurement cycles before the Trigger occurs.

When a measurement is saved in due to a Looseness Trigger, it will have
this icon in EVView.

NOTE:
For a Looseness Trigger to occur, the load and temperature Operating
Conditions must be available either through a Remote I/O Unit or directly
through Modbus.

4.6.11. Multiple Triggers

When multiple Triggers occur on the same measurement, then the measurements saved
will have an icon in EVView indicating that multiple Triggers occurred. The tooltip for the icon
will list the Triggers that occurred.

When a measurement is saved in due to multiple Triggers, it will have this
icon in EVView.

4.7. Modbus Outputs

EV Measurement data is hosted inside the monitor for an external Modbus master to read.
To access the data registers, connect to the GuardII+ using Ethernet and query the monitor
using the standard Modbus over TCP/IP protocol. This data is updated during every
measurement cycle. Modbus data outputs include:
• Measurement time

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