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PGEARI Parameter (S300-S700)

ASCII - Command PGEARI    
Syntax Transmit PGEARI [Data]    
Syntax Receive PGEARI <Data>   Available in  
Type Variable rw   MMI Yes
ASCII Format Integer32   CANBus Object Number 35CA (hex)
DIM µm   PROFIBUS PNU 1802 (dec) IND = 1 (dec)
Range long int   DPR 202 (dec)
Default 10000    
Opmode All   Data Type Bus/DPR Integer32
Drive State -   Weighting  
Start Firmware 1.0    
Configuration No   Last Change of this Object 2.6
Function Group position loop   EEPROM Yes
Short Description Position Resolution (Numerator)

Description

Description:

The pararameter PGEARI is used in conjunction with the PGEARO parameter to convert the internal position and speed from increments into user-defined units. The PGEARI parameter contains the number of user-defined units that are counted at PGEARO turns. The user decides which unit is used by the formula PGEARI/PGEARO.

Note: If PGEARI = PGEARO * 2^PRBASE, then there will be no conversion from user-defined units into increments. In this case, the position and velocity must be given in increments.

1. Example:

If a band-conveyer moves 3cm by one turn of the rotor shaft and the operator wants to use the unit mm, the value of PGEARI/PGEARO must be 30000. It is advisable to set PGEARI=30000 and PGEARO=1. The position can now be adjusted in mm.

If a gearing is connected previous to the band-conveyer with a ratio of 3:1, the user just needs to set PGEARO=3. Also odd-numbered values of the ratio are possible (e.g. 2.5:1). For that purpose PGEARI must be multiplicated with 2 and PGEARO with 5.

2. Example

A motion task should be driven by a certain speed. Therefore Bit 13 of the motion task control word o_c has to be set on 1. For that purpose the parameter o_v describes the target speed in the user-defined unit/sec. To get the target speed in SI-units use the following formula:

o_v=10000; PGEARI=1000, PGEARO=1

n [rev*sec^-1] = o_v / ( PGEARI / PGEARO )



Examples to explain the

Resolution = PGEARI / PGEARO :

Linearmotor >>> 1

Turntable >>> 2

Turntable extern driven >>> 3

Spindel >>> 4

Beltdrive >>> 5