Woodward 8923-2143 Turbine Shutdown Trip Block Assemblies

If an overspeed is detected, the unit trips. As the speed exceeds the currently

displayed peak speed, the peak speed is updated and stored in non-volatile

memory. The operator interface is still active. That is, all parameters can be

displayed, and tunable parameters can be changed.

Peak speed is not stored in non-volatile memory if an overspeed condition has

not occurred.

To reset a unit's peak speed, place the key switch in the PROGRAM position,

then press the RESET key. The message "RESET PEAK? ADJ  = YES ADJ 

= NO" appears. Press the ADJ  key to reset the peak speed. After pressing

either the ADJ  or the ADJ  keys, the unit resumes normal operation. If

neither key is pressed within 10 seconds, a "no" response is assumed and the

prompt disappears. Return the key switch to the MONITOR position.

Up to two Remote RTN modules may be installed into each MicroNet Plus 8/14 expansion chassis (only

one RTN for 6/12 slot expansion chassis). When initialized by the main chassis CPU, the Remote RTN

modules will acquire either a SYSCON or STANDBY status. The Remote RTN module that becomes

SYSCON will control the expansion chassis where it is located. It will synchronize with the STANDBY

Remote RTN module and perform any redundancy functions as necessary. Input and output data from all

I/O modules will be managed appropriately and made available to the GAP Application running in the

main-chassis CPUs.