Emerson SI-Universal User Manual page 70

Position feedback power supply trips
The position feedback power supply from the drive can be switched off by the drive either because
the power supply is overloaded (Enc PS Overload trip) or because the internal 24 V supply within
the drive is overloaded (drive PSU 24V trip). The internal 24 V supply in the drive provides power
for the position feedback power supply, user 24 V output, digital I/O, option modules etc.
To ensure that an Enc PS Overload trip is not initiated when the internal 24 V is overloaded, and
subsequently switched off by the drive, there is a delay of 40 ms in the detection of Enc PS
Overload trip. It is possible for other position feedback trips, such as wire break detection (i.e. Wire
break trip), to occur when the power supply is removed from the position feedback device.
Therefore overloading the internal 24 V supply on the drive or the position feedback supply could
result in an immediate Wire break trip. To ensure that the correct reason for the trip is given, Enc PS
Overload trip will override an existing Wire Break trip to SSI error trip. This means that both the
original trip (Wire Break trip to SSI error trip) and then the new trip (Enc PS Overload) are stored in
the trip log.
Setup Changed P1 trips
If P1 Error Detection Level (1x.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 P1 trip suppression is only active with AB, FD, FR, AB Servo, FDServo
and FR Servo type encoders, all other encoders will trip the drive if one of the setup parameters
has changed whether the drive is running or disabled.
1x.041
Minimum
Default
Type
Display Format
Coding
Value
0
1
70
P1 Auto-configuration Select
0
1
8 Bit User Save
None
RW, Txt
Text
Disabled
Enabled
Maximum
Units
Update Rate
Decimal Places
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