MLGearWriteRatSlp

 Function A function calculates a result according to the current value of its inputs. A function has no internal data and is not linked to declared instances. - Sets the Ratio Slope value of a selected Gear Pipe Block.

Inputs

Input	Data Type	Range	Unit	Default	Description
BlockID	DINT	-2147483648 to 2147483647	N/A	No default	ID number of an initialized Gear Pipe Block.
Slope	LREAL	No range	1/sec	No default	New Ratio value to be assigned to the selected Gear Pipe Block. Values lower then 1.0 can be entered, but require a leading 0 (zero). Example: 0.8 instead of .8.

Outputs

Output	Data Type	Range	Unit	Description
Default (.Q)	BOOL			Returns TRUE if the Ratio Slope value is changed in the selected Gear Pipe Block. See Pipe Network - General Rules.

Remarks

• Ratio Slope sets the limit at which step changes in ratio are implemented.
• The GEAR block output adds a position Position means a point in space which is described by different coordinates. Depending on the used system and transformation it can consist of a maximum of six dimensions (coordinates).This means three Cartesian coordinates in space and coordinates for the orientation. In ACS there can be even more than six coordinates. If the same position is described in different coordinate systems the values of the coordinates are different. offset to the GEAR block input when using a RatioSlope.
• See RatioSlope Offset for examples.

• 
  

• Set the RatioSlope < (Ratio * EtherCAT Ethernet ofr Control Automation Technology. EtherCAT® is an open, high-performance Ethernet-based fieldbus system. The development goal of EtherCAT is to apply Ethernet to automation applications which require short data update times (also called cycle times) with low communication jitter (for synchronization purposes) and low hardware costs. Update Rate).
  The Gear block makes a jump (without a ramp The gradual acceleration and deceleration of a stepping motor. This is essential if performance beyond the start/stop range is required. The slope of the ramp is a function of screw pitch, load, drive voltage and design, and motor.) from one gear to the next when the RatioSlope is greater than the Ratio change factor multiplied by the update rate scale factor.

RatioSlope Offset

With Offset

• If MLGearWriteRatSlp is set as to generate a ramp (instead of a step) when going from a gear ratio of 1 to 2, there is a position offset when the gear ratio settles as 2.
• In this image:
  • The ratio goes from 1.0 to 2.0.
  • Green is PN Gear Block Output.
  • Red is Gearbox Input.

Green line: PN Gear Block Output. Red line: PN Gearbox Input. When the ratio changes. Phase difference.

Without Offset

If MLGearWriteRatSlp is set without a ramp, , there is no offset.

Green line: PN Gear Block Output. Red line: PN Gearbox Input. When the ratio changes. Synched.

FBD Language Example

FFLD Language Example

IL Language Example

Not available.

ST Language Example

//Set the Ratio Slope value of Gear1 Pipe Block to 100
MLGearWriteRatSlp(PipeNetwork.GEAR1, 100.0);

See Also

• MLGearInit
• MLGearReadOffSlp