Woodward 2301E-HT, Руководство по эксплуатации продукта

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Manual 35092 2301E-HT Hydro (Francis Turbines)
Woodward 29
Any of these alarm conditions can be corrected while the unit is running and the control can be given a
“Reset” command.
Shutdown conditions will de-energize the ESD (Emergency Shutdown) relay. (one of the programmable
functions of the relay ou
tputs). This relay should be tied to the application’s Emergency Shutdown circuit.
The control cannot be started after an emergency shutdown until a “Stop” command is given and then
another “Start” command is issued.
The following is a list of conditions
that result in a Shutdown and a “Governor Shutdown” alarm:

Speed Signal Failure : When the speed signal fails, the control will shut down the unit.

Unit Overspeed
: When the unit’s speed exceeds the “Overspeed Set Point,” the control will shut
down the unit.

Gross/Large Gate Position Mismatch
: When the gate position does not match the control’s gate
position demand within the “Gross Mismatch Window” for the “Gross Mismatch Delay Time,” the
control will shut down the unit.

Gate Position Signal Failure : When the gate position signal is lost, the control will shut down the
unit.

Incomplete Start
: When the unit is given a “Start” command and does not reach the “Start Speed”
set point before the “Time to Start Speed” timer expires, the control will shut down the unit.

Modbus Input Shutdown
: When the unit is given an “Emergency Shutdown” command through
Modbus communications, the control will shut down the unit.

ESD Discrete Input:
When the unit is given an “Emergency Shutdown” command through a discrete
input, the control will shut down the unit.

Power up Trip : This shutdown occurs when the 2301E-HT is turned on or reset.
Emergency Shutdown
If the ESD Discrete Input occurs the 2301E-HT will be tripped but the
ESD discrete output won’t de-energize. This is used to prevent trip
loops.
Calibrate Mode
The 2301E-
HT has a Calibrate Mode to assist with the system’s control calibration. The Calibrate Mode
can be enabled only from the Configuration Menus, and can be operated only from the Service Menus.
Calibrate Mode must be disabled from the Configuration Menus in order to return to the normal run
operation mode or to issue a start.
The Calibrate Mode should only be entered when the unit is shut
down, de-watered, and it is safe to move the gates. All I/O points will
be under complete manual control!
When the Calibrate Mode is enabled, all analog outputs can be forced to output 0%, 25%, 50%, 75%,
100%, or a custom percentage of full scale current, the relay outputs can be manually energized, the
analog input current can be directly monitored, and the discrete inputs can be directly monitored.
Step Test
During the initial calibration of the control system, the 2301E-HT must be calibrated for optimum
performance. Step test logic is built into the 2301E-HT to aid in the tuning of the off-line PID gains and the
intermediate valve gains.
The off-line PID gains must be tuned when the unit is off-line or in isochronous mode on an isolated
system. When the step test is enabled, the step test logic introduces a step change, in percent of rated
speed, to the speed reference. The step change causes the control to respond and correct the resulting
speed error, and the PID gains can be adjusted until the optimum control response is observed.
Released