Position Bias Function - Omron RX Series User Manual

6 Vector Control
 Setting Example
Main motor
Sub motor
Ratio of main motor rpm
To operate the inverter under the above conditions, set the following data on the slave inverter.
Pulse Train Input Selection (P013)
Electronic Gear Position Selection (P019)
Electronic Gear Ratio Numerator (P020)
Electronic Gear Ratio Denominator (P021)
The following shows an example of the ratio of the slave rpm to the master rpm according to the P019
to P021 settings.
It assumes that the same number of encoder pulses (1,024 pulses) is set on both inverters.
Electronic Gear Position Selection
Electronic Gear Ratio Numerator (P020)
Electronic Gear Ratio Denominator (P021)
Slave rpm/Master rpm
6-6-3

Position Bias Function

• Use this function to shift the origin position by adding the value set in the Position Bias Amount
(P024) to the value of the origin determined through origin search (encoder Z-phase detection)
operation in the pulse train position control mode.
• This function is useful for shifting the mechanical system origin to an application-specific origin,
adjusting the phase of synchronization points during synchronous operation, and so on.
• Set an addition value in the Position Bias Amount (P024). A positive value adds the value in the
forward direction.
Parameter No.
P024
Note The current value at completion of origin search operation, etc. can be preset.
6 - 38
Item
Item
(P019)
command side)
1,024
2,048
1/2
Function name
Position Bias Amount
High-function General-purpose Inverter 3G3RX-V1 User's Manual (I578-E1)
Number of encoder pulses = 1,024
Number of encoder pulses = 3,000
to sub motor rpm = 2:1
00 (90°phase difference pulse train)
01 (REF)
3,000
1,024 × 2 = 2,048
REF REF
(Position (Position
command side)
2,048
1,024
2
Data
–204 to –100 (–2048 to –1000),
–999. to 2048
Setting
Setting
FB FB
(Position (Position
feedback side) feedback side)
1,024 2,048
2,048 1,024
2 1/2
Default data
0. –
Unit