Delta RMC101 Uživatelský manuál stáhnout pdf (Strana 245)

100

101

Position/Pressure Control 4.12

Controller Features 4-59

o The overshoot disappeared because the pressure did not change as quickly. There is some

lag upon the transition, but can likely be corrected by adjusting the entering speed.

• Another method of eliminating the lag immediately after the transition is to use the following two

parameters:

o Integrator Preload

o Drive Transfer Percent

Both of these parameters add drive to the Integral Drive when pressure control begins. The

difference between these two is that Integrator Preload adds a set value to the drive, while Drive

Transfer Percent adds a percentage of the drive immediately prior to the transition.

• The Drive Transfer Percent is useful when the entering conditions vary, such as the speed. The

Integral Preload is useful when the entering conditions are the same every time.

Warning! These parameters add drive to the Integral Drive. In order for this drive to "unwind" (go

towards zero), the Integral Gain must be greater than zero! If the Integral Drive cannot unwind,

the system will not control properly.

• Setting the Integral Preload to 200 (200 mV of drive), issuing a P cmd, and then running Event

Step 1 results in the following plot:

1 2 ... 240 241 242 243 244 245 246 247 248 249 250 ... 950 951

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Delta RMC101 Uživatelský manuál Strana 245

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