KEB COMBIVERT F5 BASIC - Page 259

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KEB COMBIVERT F5
Name: Basis
28.01.02
6
Section PageDate
© KEB Antriebstechnik, 2002
All rights reserved
Chapter
Functional DescriptionEncoder Interface
6.10.7 Additional
Parameters
The following parameters are needed only for specific encoder interfaces and are
explained more closely in the appropriate documentation.
If an SSI-multiturn-absolute value encoder is connected, the number of the bits for the
multiturn-resolution can be adjusted here (12 Bit).
The clock frequency of the SSI-encoder is adjusted in Ec.22. Two clock frequencies
are available 0 : 312,5 kHz or 1 : 156,25 kHz. The smaller clock frequency should only
be adjusted for long cables or in case interferences occur.
The unit supports two data formats for the SSI-encoders:
0 : binary coded 1 : Gray code
As reference speed the max. tachometer speed is adjusted in Ec.25.
Ec.31 and Ec.32 show the position values of channel 1 and 2 after the gearbox.
With a HARDWARE-RESET at the absolute value encoder only the positions after
decimal point are reset. In order to display the new absolute position in parameter
ec.31/32 a RESET of ec.33/34 must take place.
Formula : ec.33/34 = position value- reference point (ps17)
ru.54 = reference point (ps.17)
By writing on this parameter the systems offset is reset.
The acutal position (ru.54) is automatically recalculated, except for ps.14 bit0..1 = 3
the mode Store Position Value is selected.
Formla: actual position (ru.54) = position value - system offset (ec.33/34)
Ec.36 indicates the type of the first encoder interface.
Ec.37 indicates the status of the Hiperface.
Ec.38 adjusts the performance of the Hiperface.
SSI Multiturn resolution
(Ec.21)
SSI Clock frequency select
(Ec.22)
SSI Data code (Ec.23)
Nominal tacho speed (Ec.25)
Position Channel 1 (Ec.31)
Position Channel 2 (Ec.32)
System offset Channel 1
(Ec.33)
System offset Channel 2
(Ec.34)
Encoder 1 Typ (Ec.36)
Encoder 1 Status (Ec.37)
Encoder 1 r/w (Ec.38)
In order to replace S4-systems by F5-S the following calculation must be carried out:
ec.7 ( S4) * Pole pair number
- Furthermore pay attention to the encoder cable -
- The lower 16 Bit of the result must be entered in Ec.2/12 -