PowerFlex 40P User Manual - Частотные преобразователи Allen

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PowerFlex 40P User Manual - Частотные преобразователи Allen | Manualzz

Encoder Usage and Position StepLogic Application

F-11

E248 [Enh Control Word]

This parameter allows many of the positioning functions to be completed via parameter control using an explicit message. This allows the operation over communications instead of with hardware inputs. The bits have the same functions as the digital input options of the same name.

Options relating to positioning are:

Bit 0 “Home Limit”

Bit 1 “Find Home”

Bit 2 “Hold Step”

Bit 3 “Pos Redefine”

E230-E244 [Step Units x]

All of the position steps can be written to while the drive is running. The changes will take place at the next move. For example, if step 0 is over-written while the drive is moving to step 0, the drive will move to the previous commanded position at step 0. The next time the drive is commanded to return to step 0 it will proceed to the new position. One possible use of this capability is when an application requires full control of the movement by a controller external to the drive. The Step Logic program might be written to jump from step 0 back to step 0 when Input

1 is active. The controller could write any desired position to step 0 and then toggle the input 1 bit of E248 [Enh Control Word] to cause the drive to move to the new position. This allows almost unlimited flexibility and can be used with absolute or incremental moves.

Setup Notes

The RA computer tools (DriveExplorer and DriveTools SP) can make setup of the positioning functions much easier. Please refer to the latest versions for additional tools or wizards which can aid in the setup.

F-12

Notes:

Encoder Usage and Position StepLogic Application

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