Manual 26710V1
ProTechTPS Total Protection System
Woodward
79
Speed Redundancy Manager Input Difference Alarm (if speed redundancy
manager is used)
Speed Redundancy Manager Input 1 Invalid (if speed redundancy manager
input 1 is used)
Speed Redundancy Manager Input 2 Invalid (if speed redundancy manager
input 2 is used)
Speed Redundancy Manager Input 3 Invalid (if speed redundancy manager
input 3 is used)
Temporary Overspeed Setpoint Enabled Alarm
Manual Simulate Speed Test Enabled Alarm
Auto Simulated Speed Test Enabled Alarm
Auto Simulated Speed Test Failed Alarm
Auto-Sequence Test Active Alarm
Auto-Sequence Continue Input Timeout Alarm (if continue input is used)
User Test 1 Active (if configured)
User Test 2 Active (if configured)
User Test 3 Active (if configured)
Trip Cycle Time Mon 1 (if configured)
Trip Cycle Time Mon 2 (if configured)
TRIP (if configured)
User configurable Alarms 1-75 (if configured)
NOTE: The user can define the Name associated with each user-defined Alarm.
Trip Latch
In almost every case, the ProTechTPS and associated trip system will be
designed such that two modules must be issuing a trip command before the unit
will be tripped. This is referred to as a 2-out-of-3 (2-o-o-3) trip scheme. In the
“Independent Trip Relay” version of the ProTechTPS, the trip action of each
module may put part of the trip system into a tripped state and at least two
modules must be tripped to trip the unit. In the “Voted Trip Relay” version of the
ProTechTPS, at least two modules would have to be in the tripped state for the
voter relay to go to its tripped state.
A "trip" of the module refers to the action of the ProTechTPS module changing the
state of its Trip output. When any of the Trip Latch inputs becomes true, the output
of the trip latch is set TRUE. The red TRIPPED light is illuminated on the front
panel. The module trip relays are put in the trip state (which could be configured as
energized or de-energized). Each Trip Input is individually latched, and those
latched outputs are available on Modbus. The individual latches are reset by the
reset function if the input is false. The first input to set the Trip latch, or First Out
(FO), is also latched. This first out indication is available in the trip log and on
Modbus. The Trip latch output remains TRUE and the First Out indication remains
unchanged until the reset function occurs and all inputs are false.
When configured as de-energize-to-trip, the modules power up in the
tripped state. When configured as energize-to-trip, the modules
power up such that they do not enter the tripped state unless a trip
condition is present.
The logic unit requires that it be in the tripped state in order to
change the configuration.