Emerson SI-Universal User Manual page 111

Setup Changed P2 trips
If P2 Error Detection Level (2x.040) bit 4 is set then:
• The drive will not trip if any of the setup parameters are changed whilst the drive is in the Inhibit or
Ready state. The encoder will be automatically re-configured with the new setting (no reset
required).
• The drive will trip if any of the setup parameters are changed whilst running.
• The Setup Changed P2 trip suppression is only active with AB, FD, FR type encoders, all other
encoders will trip the drive if one of the setup parameters has changed whether the drive is running
or disabled.
2x.041
Minimum
Default
Type
Display Format
Coding
Value
0 Disabled
1 Enabled
P2 Device type (2x.038) : EnDat, BiSS*
If auto-configuration has not been disabled (i.e. P2 Auto-configuration Select (2x.041) = 0) then
during position feedback Initialization, the encoder is interrogated to determine whether the
encoder is a rotary or linear encoder and P2 Linear Feedback Select (2x.051) is set up
appropriately. The following parameters are then set-up based on information from the encoder:
Rotary
P2 Rotary Turns Bits (2x.033)
P2 Rotary Lines Per Revolution (2x.034)
P2 Comms Bits (2x.035)
The following actions are also taken to set up the timing for the encoder.
Comms
Protocol
P2 Calculation Time (2x.060) = From the encoder
EnDat 2.1 P2 Recovery Time (2x.061) = 30 μs
Line delay measured and result written to P2 Line Delay Time (2x.062)
P2 Calculation Time (2x.060) = From the encoder
P2 Recovery Time (2x.061) = 4 μs and the recovery time within the encoder is set
EnDat 2.2 up to the shortest value of 3.75 μs if the P2 Comms Baud Rate (2x.037) is 1M or
more.
Line delay measured and result written to P2 Line Delay Time (2x.062)
P2 Recovery Time (2x.061) = 12 μs
BiSS*
Line delay measured and result written to P2 Line Delay Time (2x.062)
SSI Line delay measured and result written to P2 Line Delay Time (2x.062)
* BiSS is not currently supported.
SI-Universal Encoder User Guide
Issue: 2
P2 Auto Configuration Select
0
1
8 Bit User Save
None
RW, Txt
Text
Maximum
Units
Update Rate
Decimal Places
Linear
P2 Linear Comms Pitch (2x.052)
P2 Linear Line Pitch (2x.053)
P2 Comms Bits (2x.035)
P2 Linear Comms And Line Pitch Units (2x.054)
Actions taken
1
Background read
0
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