Emerson SI-Universal User Manual page 84

The flags are assigned as shown below.
Position Feedback
Bit
0 P1
1 P2
If a drive reset is initiated, the bits in Position Feedback Initialized (1x.076) are checked, and if any
position feedback devices are not initialized an attempt is made to initialize them.
The following table shows the initialization process for different position feedback devices that can
be connected to the drive.
Encoder types
None. Initialization is immediate and is always successful. The position
AB, FD, FR
feedback is set to zero on initialization.
The absolute position used to control a motor can only be defined accurately
AB Servo after two different changes of state of the UVW commutation signals.
FD Servo Initialization resets the system that ensures that the UVW signals alone will be
FR Servo used to define the motor position until the encoder has moved through two valid
SC Servo commutation signal state changes. Initialization is immediate and is always
successful. The position feedback is set to zero on Initialization.
The SINCOS interpolation system must be initialized. Initialization is immediate
SC
and is always successful. The position feedback is set to zero on Initialization.
Auto-configuration if required except SC SSI.
SC Hiperface
The absolute position must be obtained via comms. This may cause a large
SC EnDat
change in position feedback.
SC SSI
The SINCOS interpolation system must be initialized. This may have a small
SC BiSS*
effect on the position feedback.
EnDat Auto-configuration if required except SSI.
BiSS* The absolute position must be obtained via comms. This may cause a large
SSI change in position feedback.
1x.085
Minimum
Default
Type
Display Format
Coding
Encoder Simulation Source (1x.085) is used to select a parameter as the input to the encoder
simulation system. If Encoder Simulation Source (1x.085) is zero then no source is selected and
the encoder simulation system is disabled. The encoder simulation output connections are shared
with the P1 and P2 position feedback interfaces, and so encoder simulation may be disabled
because the connections are not available. See Encoder Simulation Status (1x.086) for details. Any
parameter can be selected as the source, but it is assumed that the input is a 16 bit value with a
range from 0 to 65535 or from -32768 to 32767. The source parameter is treated differently
depending on the value of Encoder Simulation Mode (1x.088) as given in Table 7-6 Encoder
simulation source .
* BiSS is not currently supported.
84
Interface
Encoder Simulation Source
0.000
0.000
16 Bit User Save
None
RW, PT, BU
Initialization process
Maximum
Units
Update Rate
Decimal Places
SI-Universal Encoder User Guide
59.999
Reset read
3
Issue: 2