Emerson SI-Universal User Manual page 68

Encoder trips
The following table shows trips that can be initiated that are related to the position feedback
interface. All trips will be prefixed by "Slotx Error", where x defines the slot number where the
module is fitted.
Module trip
* Enc PS Overload
* Wire break P1
* Wire break A P1
* Wire break B P1
* Wire break Z P1
* UVW phase P1
Phase offset P1
* Comms timeout P1
* CRC error P1
* SSI error P1
** Setup changed P1
Comms period P1
Encoder type P1
Rotary LPR P1
Line pitch P1
Turns bits P1
Comms bits P1
+ These trips can be enabled or disabled with P1 Error Detection Level (1x.040) bits 0 to 2.
* These trips can be enabled or disabled with P1 Error Detection Level (1x.040) bit 3.
** This trip can be enabled or disabled with P1 Error Detection Level (1x.040) bit 4.
*** BiSS is not currently supported.
68
Encoders
All
AB, FD, FR, AB Servo,
FD Servo, FR Servo
SC, SC Servo, SC
Hiperface, SC EnDat, SC
SSI, SC BiSS***
AB Servo, FD Servo, FR
Servo, SC Servo
SC Hiperface, SC EnDat,
SC SSI
SC Hiperface, SC EnDat,
EnDat, BISS***
SC Hiperface, SC EnDat,
EnDat, BISS***
SC SSI, SSI
SC Hiperface, SC EnDat,
EnDat, BiSS***
SSI, SC SSI
All
EnDat, SSI, BiSS***
SC Hiperface, BiSS***
SC Hiperface, SC EnDat,
EnDat, BiSS***
Reason for error
Power supply short circuit
+Hardware wire-break detect on A1, B1 and
1
Z1 inputs . There is no wire break detection
on the U1, V1 and W1 commutation inputs
+Software wire break detection on sine wave
signals. There is no wire break detection on
the U1, V1 and W1 commutation inputs
2
+Phase error
+Sine/cosine phase error
Comms timeout
Checksum/CRC error
Not ready at start of position transfer (i.e. data
input not one)
The encoder has indicated an error
+Power supply alarm bit active
A set-up parameter for the device has been
changed.
P1 Device Type (1x.038), P1 Comms Bits
(1x.035), P1 Comms Baud Rate (1x.037), P1
Calculation Time (1x.060), P1 Recovery Time
(1x.061), P1 Line Delay Time (1x.062) and
P1 User Comms Enable (1x.067) are used to
determine the time taken for the
communications exchange with the encoder.
If this time exceeds 250 µs a Comms Period
P1 trip is initiated.
The encoder could not be identified during
auto-configuration
Data read from the position feedback device
during auto-configuration is out of range
SI-Universal Encoder User Guide
3
Issue: 2