Commissioning
4.3 Creating a STEP 7 project
Connecting SIMOVERT MASTERDRIVES MC to the Technology-CPU
Product Information, 03/2008, A5E00272072-05
37
SIMOVERT MASTERDRIVES Motion Control
The encoder used for the drive configuration is selected using the order number (motor
rating plate).
The required settings of the parameters can be found in the following tables.
Parameter: U922 index 1 (encoder actual values)
Meaning:
The actual position value is connected to the encoder interface via U922.i001. With an
absolute encoder, the absolute value from the encoder is specified as the actual position
value. Please note that it takes a moment to read this value after initialization of the Motion
Control system (the correct value is available).
If a resolver or encoder is used, connector KK120 (actual position value) must be set in
U922.i001 (actual position value encoder interface). If, however, a multiturn encoder is used,
the connector KK100 (absolute position) must be set in U922.i001 (actual position value
encoder interface).
Parameter: P183 index 1 (position sensing configuration)
Meaning:
The position detection configuration is entered in this parameter.
The last digit enables position sensing.
xxx1 = Enable resolver/encoder
xxx2 = Enable multiturn encoder (x means not relevant)
Parameter: P171(position resolution)
Meaning:
In MASTERDRIVES, the position resolution, including a fine resolution (multiplication factor),
is specified. The resolution is specified as a power of two.
The position resolution must be set as follows:
2
P171
= encoder resolution x multiplication factor of the cyclic encoder actual value
i.e. for incremental encoders: incResolution x IncResolutionMultiplierCyclic
i.e. for absolute value encoders: AbsResolution x AbsResolutionMultiplierCyclic
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