ICS TRIPLEX T8231

Brand:ICS TRIPLEX

Type:T8231

Origin: the United States

Warranty: 365 days

Colour: new/used

Shipping method: Courier delivery

Module of PLC, DCS, ESD system card, the card is a vibration monitoring system, steam turbine control system module, the advantages of the gas generator spare parts brand: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts

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Cascade Setpoint Tracking To allow a bumpless transfer from turbine Speed/load control to Cascade control, the Cascade PID can be programmed to track its controlling process input when disabled. When this tracking feature is programmed, the Cascade PID will be satisfied when enabled, and no turbine speed or load correction will be performed. After the Cascade control is enabled, its setpoint can be moved as required to another setting. Cascade Setpoint with No Tracking If the Cascade control is programmed not to use the setpoint tracking feature, the setpoint will remain at its last setting (running or shutdown). When the 505E is powered-up the setpoint is reset to the ‘Setpt Initial Value’. With this configuration, when Cascade control is enabled, and the sensed process signal does not match setpoint, the Cascade control will ramp turbine speed/load up or down to match the two signals, at a controlled “not- matched” rate (defaulted to the ‘Speed Setpoint Slow Rate’ setting, and tunable through the Service mode). If Cascade is the controlling parameter and one of the permissives is lost or Cascade is disabled, the speed setpoint will remain at the last setting until another parameter adjusts it. Cascade Droop When sharing control of a parameter with another external controller, the Cascade PID can also receive a programmable DROOP feedback signal for control loop stability. This feedback signal is a percentage of the Cascade PID’s output. By including this second parameter into the control loop, the Cascade PID becomes satisfied, and does not fight with the other external controller over the shared parameter. 

If Cascade droop is used, the Cascade input signal will not match the Cascade setpoint when in control. The difference will depend on the amount (%) of droop programmed and the output of the Cascade PID. The Droop value fed back to the Cascade PID is equal to the following defaulted settings:Example: 25% x 5% x 600 psi x 0.0001 = 7.5 psi The ‘CASCADE DROOP %’ and ‘MAX CASC SETPOINT’ values are set in the Program Mode and the ‘PID output %’ is determined by the Cascade demand. Refer to Volume 2 of this manual for information on related Service mode tunables. Invert Cascade Depending on the control action required, the Cascade input signal can be inverted. If a decrease in HP governor valve position is required to increase the Cascade process signal, program the ‘INVERT CASCADE INPUT’ setting to ‘YES’. An example of this required control action would be when the Cascade PID is configured to control turbine inlet steam pressure. To increase turbine inlet steam pressure, the HP control valve position must be decreased.