BENTLY 3500/15 106M1079-01

Brand:BENTLY

Type:3500/15 106M1079-01

Origin: the United States

Warranty: 365 days

Colour: new/used

Shipping method: Courier delivery

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The Extr/Adm setpoint range must be defined in the program mode. Program settings ‘Min Extr/Adm Setpoint’ and ‘Max Extr/Adm Setpoint’ define the range of the Extr/Adm setpoint and control. When a raise or lower Extr/Adm Setpoint command is issued, the setpoint moves at the programmed ‘Extr/Adm Setpt Rate’ setting. If an Extr/Adm raise or lower command is selected for longer than three seconds, the Extr/Adm setpoint will move at the fast rate which is three times the Extr/Adm setpoint rate. The Extr/Adm setpoint rate, fast rate delay, and fast rate can all be adjusted in the Service mode.

The shortest length of time a setpoint will move for an accepted raise or lower command is 120 milliseconds (240 milliseconds for a Modbus command). If the Extr/Adm setpoint rate is programmed for 10 psi/sec, the smallest increment it will move is 1.2 psi (2.4 psi for Modbus). A specific setpoint may also be directly entered through the 505E keypad or Modbus communications. When this is performed, the setpoint will ramp at the ‘Extr/Adm Setpt Rate’ (as defaulted in Service mode). To “enter” a specific setpoint from the 505E keypad, press the Ext/Adm key to view the Extr/Adm control screen, press the ENTER key, enter the setpoint level desired, then press the ENTER key again. If a valid number was entered, equal-to or between the min and max setpoint settings, the setting will be accepted and the Extr/Adm setpoint will ramp to the “entered” setpoint level. If an invalid number is “entered”, the setting will not be accepted and the 505E’s screen will momentarily display a value out-of-range message. When ramping to a valid setting, the setpoint ramps at the Extr/Adm Setpoint “entered” rate which is defaulted to the E/A setpoint rate. This “entered” rate is tunable through the Service mode. EXTR/ADM Setpoint Tracking This feature is programmable and usable only if the 505E is programmed for an admission or extraction/admission application. To reduce the number of steps required to enable Extr/Adm control bumplessly, the Extr/Adm setpoint can be programmed to track the Extr/Adm process input when disabled. This tracking feature allows the Extr/Adm PID to be satisfied when enabled, thus there is no immediate or radical process correction required. After the Extr/Adm control is enabled, its setpoint can be moved, as required, to another setting. EXTR/ADM Setpoint with No Tracking If the Extr/Adm control is programmed not to use the setpoint tracking feature, the setpoint will remain at its last setting (running or shutdown). With this configuration, when Extr/Adm control is enabled and the sensed process signal does not match setpoint, the Extr/Adm control will ramp the Extr/Adm process up or down to match the two signals. When the 505E is powered-up, the setpoint is reset to the ‘Setpt Initial Value’. With this configuration, if one of the permissives is lost or Extr/Adm control is disabled, the Extr/Adm setpoint will remain at its last setting until otherwise adjusted. Refer to Volume 2 of this manual for further information on Service mode and online tunables. All pertinent Extr/Adm control parameters are available through the Modbus links. See Chapter 6 for a complete listing of Modbus parameters. Remote Extr/Adm Setpoint The Extr/Adm setpoint can be positioned through an analog signal. Optionally, one of the 505E’s analog inputs can be programmed to position the Extr/Adm PID setpoint. This allows the Extr/Adm setpoint to be positioned remotely by a process control or distributed plant control system.