Product Details
Product Description
Product Description
Brand: ABB
Type: PM904F 3BDH001002R0001
Origin: the Swiss
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 of our products are widely used in metallurgy, petroleum, glass, aluminum manufacturing, petrochemical industry, coal mine, papermaking, printing, textile printing and dyeing, mechanical, electronic manufacturing, automobile manufacturing, plastic machinery, electric power, water conservancy, water treatment/environmental protection, boiler heating, energy, power transmission and distribution and so on.
The remote cascade control indications shown in Table 5-11 are available through the Modbus links: Remote Cascade is Enabled, Remote Cascade is Active, Remote Cascade is In Control, Remote Cascade is Inhibited, and Remote Cascade Input Failed Alarm. In addition to these indications, the Remote Cascade Input Setpoint is also available. Relay indications can be programmed to indicate Remote Cascade Control Active and Remote Cascade Control Enabled status’. Extraction/ Admission (EXT/ADM) Key Screens This key is always active. Figure 5-16 shows the possible screens that may appear if the EXT/ADM key is pressed. Only the screens related to the Extraction/Admission functionality programmed will be displayed. Only when the Remote Extr/Adm Setpoint is programmed, will screen 4 appear. The Extr/Adm PID dynamic and droop values can be adjusted from screens 5 and 6.
Enabling Extraction Control There are two ways of enabling/disabling extraction control: manually or automatically. The manual enable/disable routine uses the LP valve limiter’s raise/lower commands, and automatic enable/disable routine uses an enable/disable command. Automatic enabling/ disabling can only be performed if the “Automatic Enable?” setting is programmed “Yes”. With automatic Extr/Adm enabling programmed, an operator can also enable and disable Extraction control manually if desired. To manually enable Extraction control, press the LMTR key and slowly lower the LP valve limiter until the Extr/Adm PID takes control of its process, then continue running the LP valve limiter to its minimum (closed) position. If the LP valve limiter is not fully closed, it will act as an extraction limiter and will interfere with automatic governor operation. All related Extraction permissives must be met before the 505E will allow the LP valve limiter to be lowered, and Extr/Adm control enabled. If programmed for auto enable, Extr/Adm control can be enabled by pressing the front panel YES key from the Status screen (screen 2), closing the Extr/Adm Control Enable/ Disable contact (if programmed), or selecting Extr/Adm Enable from either Modbus communications link. If programmed for auto enable, Extr/Adm control is disabled by pressing the front panel NO key from the Extr/Adm Status screen (screen 2), opening the Extr/Adm Control Enable/Disable contact (if programmed), or selecting Extr/Adm Disable from either Modbus communications link. For Admission or Extraction/Admission units, refer to Chapter 3 for a detailed startup procedure. Extr/Adm control is disabled and ‘inhibited’ if a controlled shutdown is selected, the Extr/Adm input fails, or the unit shuts down. Extr/Adm control can be ‘enabled but not active’ if the generator and/or utility tie breaker are open or speed is too low, depending on configuration. Since the Extr/Adm PID controls through the ratio/limiter and LP Valve Limiter, Extr/Adm will only be “In Control” when the ratio/limiter is “In Control” of the actuator output and not limited by a steam map limit. See Table 5-13 for all possible Extr/Adm control messages.
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