EMBEDDED EPCPCRA#136 B5

Brand:EMBEDDED

Type:EPCPCRA#136 B5

Origin: the United States

Warranty: 365 days

Colour: new/used

Shipping method: Courier delivery

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In many turbines, it is desirable to avoid certain speeds or speed ranges (or pass through them as quickly as possible) due to excessive turbine vibration or other factors. During 505E programming, two critical speed avoidance bands may be selected. These bands may be any speed ranges that are between idle speed and minimum governor speed. Either the Idle/Rated or the Auto Start Sequence functions must be programmed to perform critical speed avoidance. Within a critical speed range, the 505E moves the speed setpoint at the critical speed rate programmed and does not allow the speed setpoint to stop within the critical speed avoidance band. If the turbine is accelerating through a critical avoidance band and excessively high vibrations are experienced, selecting the speed setpoint lower command will bring the unit back to the lower limit of the band.

Keypad and Display The 505E’s service panel consists of a keypad and LED display located on the front of the control as shown in Figure 1-8. The LED display has two, 24 character lines that can be used to display operating parameters and troubleshooting parameters in plain English. Also, there are 30 keys available to provide complete control from the front of the 505E. No additional control panels are required to operate the turbine; every turbine control function can be performed from the 505E’s front panel. 

Figure 1-8. 505E Key Pad and Display A description of each key’s function follows. Some descriptions refer to the function blocks contained in the programming (chapter 4) and operating flowcharts (chapter 5). SCROLL: The large diamond shaped button in the middle of the keypad with arrows at each of it’s four corners. The (scroll left, right) moves the display left or right through the function blocks of the Program or Run Mode. The (scroll up, down) moves the display up or down within a function block of the Program or Run Mode. SELECT: The Select key is used to select control of the 505E display’s top or bottom line variable. The @ sign is used to indicate which line (variable) can be adjusted by the adjust keys. Only when there is a changeable variable on both lines (dynamics, valve calibration modes) does the “select key” and @ sign determine which line variable can be adjusted. When there is only one adjustable parameter displayed on the screen the “select key” and @ sign’s position are irrelevant.