Emerson SI-Universal User Manual page 106

2x.032
Minimum
Default
Type
Display Format
Coding
P2 Marker Flag (2x.032) is set to one when a marker event occurs. The flag must be cleared by the
user.
2x.033
Minimum
Default
Type
Display Format
Coding
P2 Rotary Turns Bits (2x.033) only has any effect if the position feedback interface is being used
with a rotary device (i.e. P2 Linear Feedback Select (2x.051) = 0).
P2 Device type (2x.038) : EnDat, BISS*, SSI
P2 Rotary Turns Bits (2x.033) is used to determine the number of bits within the comms messages
from the position feedback device that represent turns. For a single turn encoder P2 Rotary Turns
Bits (2x.033) must be set to zero. It should be noted that some SSI encoders include leading zeros
before the turns information and in this case the number of turns bits should include the leading
zeros. The most significant bits in P2 Revolution/Pole Pitch Counter (2x.028) that are not included
in the turns information provided by the encoder comms are held at zero. If P2 Rotary Turns Bits
(2x.033) = 0 (single turn encoder) the whole of P2 Revolution/Pole Pitch Counter (2x.028) is held at
zero.
P2 Device type (2x.038): Any other device type
It is sometimes desirable to mask off the most significant bits of P2 Revolution/Pole Pitch Counter
(2x.028), but this does not have to be done for the drive to function correctly. If P2 Rotary Turns Bits
(2x.033) = 0 the whole of P2 Revolution/Pole Pitch Counter (2x.028) is held at zero. If P2 Rotary
Turns Bits (2x.033) has any other value it indicates the number of bits in P2 Revolution/Pole Pitch
Counter (2x.028) that are not held at zero. For example, if P2 Rotary Turns Bits (2x.033) = 5, then
P2 Revolution/Pole Pitch Counter (2x.028) counts up to 31 before being reset.
* BiSS is not currently supported.
106
P2 Marker Flag
0
0
1 Bit Volatile
None
RW, NC
P2 Rotary Turns Bits
0
16
8 Bit User Save
None
RW
Maximum
Units
Update Rate
Decimal Places
Maximum
Units
Update Rate
Decimal Places
SI-Universal Encoder User Guide
1
250 µs write
0
16
Background read, auto-
configuration write
0
Issue: 2