Lenze 8400 TopLine - Manual (Page 349)

Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
349
6 Encoder/feedback system
6.3 Multi-Encoder (X8)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
6.3.5 Internal interfaces | System block "LS_MultiEncoder"
The LS_MultiEncoder system block provides the application with speed, position and error
information from the encoder connected to the multi encoder interface X8 in the form of process
signals.
Inputs
Outputs
Identifier
Data type
Information/possible settings
wActPosExternalHW
wActPosExternalLW
WORD
(from version 14.00.00)
These inputs serves to feed in the position signal of an external encoder (e.g. via CAN
or another fieldbus) and use it as position signal.
Scaling: LW = 1 revolution, HW = number of revolutions
Thus, an encoder revolution is displayed with 65536 increments.
Identifier
Data type
Value/meaning
dnPosition_p
DINT
Actual position value from the encoder in [increments]
nActSpeed_v
INT
Actual speed from the encoder in [increments/ms]
nActSpeed_a
INT
Actual speed from the encoder in [%]
• 100 % ≡ reference speed ( C00011 )
wHighWord
wLowWord
WORD
32-bit data telegram from the encoder (raw data)
 SSI absolute value encoder with Stegmann-SSI protocol ( 337)
The output is always made in binary format, i.e. in case of Graycode encoders after
the received data is decoded. The MSB of the data is at bit 16 of the wHighWord
output. In order to obtain a standard data format (LSB at the lowest position), an
offset can be set in C00426/7 .
 Left shift of raw value ( 340)
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