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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)



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