20-94 PID Integral TimeRange: Function:20.00 s* [0.01 - 10000.00 =Off s]The integrator adds over time (integrates) the error betweenthe feedback and the setpoint reference. This is required to en-sure that the error approaches zero. Quick frequency converterspeed adjustment is obtained when this value is small. However,if too small of a value is used, the frequency converter’s outputfrequency may become unstable.7.1.4. Main Menu ModeBoth the GLCP and NLCP provide access to themain menu mode. Select the Main Menu modeby pressing the [Main Menu] key. Illustration6.2 shows the resulting read-out, which ap-pears on the display of the GLCP.Lines 2 through 5 on the display show a list ofparameter groups which can be chosen bytoggling the up and down buttons.130BP066.10Illustration 7.9: Display example.Each parameter has a name and number which remain the same regardless of the programmingmode. In the Main Menu mode, the parameters are divided into groups. The first digit of theparameter number (from the left) indicates the parameter group number.All parameters can be changed in the Main Menu. The configuration of the unit (par.1-00) willdetermine other parameters available for programming. For example, selecting Closed Loop en-ables additional parameters related to closed loop operation. Option cards added to the unit enableadditional parameters associated with the option device.7.1.5. Parameter SelectionIn the Main Menu mode, the parameters aredivided into groups. Select a parameter groupby means of the navigation keys.The following parameter groups are accessi-ble:Group no. Parameter group:0 Operation/Display1 Load/Motor2 Brakes3 References/Ramps4 Limits/Warnings5 Digital In/Out6 Analog In/Out8 Comm. and Options9 Profibus10 CAN Fieldbus11 LonWorks13 Smart Logic14 Special Functions15 Drive Information16 Data Readouts18 Data Readouts 220 Drive Closed Loop21 Ext. Closed Loop22 Application Functions23 Time-based Functions24 Fire Mode25 Cascade Controller26 Analog I/O Option MCB 109Table 7.3: Parameter groups.VLT ® AQUA DriveOperating Instructions 7. How to programme the frequency converterMG.20.M2.02 - VLT ® is a registered Danfoss trademark 817