Rockwell Automation T8442 Trusted TMR Speed Monitor - Manual (Page 29)

Trusted
TM
Module T8442
Issue 8 Apr 10 PD-T8442 29
3.1.14. Output Auto-Reset Checkbox
This checkbox can be set for each output within a group.
If an output has been configured as latching (see 3.1.13), setting this checkbox to the ticked state will
configure the output for automatic trip reset. For outputs that are configured as non-latching, this
configuration item has no effect.
Clearing the checkbox (default) will disable the automatic reset function for that output.
In Auto-Reset mode an output trip condition for a latching output will be automatically reset when the
group is at zero speed.
The default mode of operation is for automatic reset to be disabled.
The configuration will appear in the speed monitor configuration template as:
AUTO_RST <0|1>
Channel 0 is for the over-speed output, and channel 1 is for the over-acceleration output within a
group.
3.1.15. Relay Energise to Trip (ETT) Checkbox
This checkbox can be set for each output within a group.
This parameter only affects the load current monitoring mechanism and does not influence the output
relay coil drivers, which always operate in the de-energise to trip mode.
Setting this checkbox to the ticked state will configure the associated output load current monitoring for
energised to trip operation. i.e. Load current is expected only when the output is tripped.
If the checkbox is cleared (default), the output load current monitoring will be configured for de-
energised to trip operation. i.e. Load current is not expected when the output is tripped.
The default mode of operation is for de-energised to trip outputs, and requires the load to be
connected to the normally open output terminals. When energise to trip operation is selected, the load
must be connected to the normally closed pair of output terminals.
The configuration will appear in the speed monitor configuration template as:
ETT <0|1>
Channel 0 is for the over-speed output, and channel 1 is for the over-acceleration output within a
group.
3.1.16. No Test Checkbox
This checkbox can be set for each output within a group.
Setting the checkbox to the ticked state will disable relay testing on the associated output.
If the checkbox is cleared, relay testing will be enabled on the associated output.
The default mode of operation is for relay testing to be enabled.
The configuration will appear in the speed monitor configuration template as:
NO_RLY_TST <0|1>
Channel 0 is for the over-speed output, and channel 1 is for the over-acceleration output within a
group.