Square-Wave Encoder Maximum Speed Difference Per Sampling Cycle; Encoder Diagnostic Signal Selection / Enc Diag Select - Siemens SINAMICS DCM List Manual

Dependency: The following parameters are relevant for encoderless operation.
Caution: For a value = 1, 2, 3, 5 the following applies:
- encoderless operation must have been started.
- if, for synchronous motors, an encoder fault occurs below the switchover speed p1755, when switching over to
encoderless operation, the motor can stall.
For a value = 1, 5 the following applies:
- in spite of the motor encoder fault that has occurred, the motor continues to operate.
Note: For a value = 1, 2, 3, 5 the following applies:
- Refer to the status signal "encoderless operation due to a fault" (BO: r1407.13).
- If, with r1407.13 = 1, a different drive data set is selected (e.g. interconnection from p0820), then the open-loop or
closed-loop control type p1300 of this data set must match that of the original data set (e.g. p1300 = 21). Encoderless
closed-loop controlled operation is kept when changing over.
For a value = 4, the following applies:
- The value can only be set for all motor data sets when p1231 = 3, 4.
- For synchronous motors, an armature short circuit is initiated on an encoder fault.
- For induction motors, DC braking is initiated on an encoder fault. DC braking must be commissioned (p1232,
p1233, p1234).
For a value = 5, the following applies:
Same function as for value = 1. However, encoder faults are output as alarm and the message bit "Fault active"
(r2139.3) is not set. The encoder fault has to be acknowledged via the encoder interface in order to resume operation
with encoder.
p0492

Square-wave encoder maximum speed difference per sampling cycle /

n_dif max/samp_cyc
DC_CTRL, Can be changed: U, T
DC_CTRL_R,
Data type: FloatingPoint32
DC_CTRL_R_S,
P-Group: Encoder
DC_CTRL_S
Not for motor type: -
Min
0.00 [rpm]
Description: Sets the maximum permissible speed difference within the current controller sampling time for squarewave
encoders.
When the value is exceeded, depending on p0491, either encoderless closed-loop speed/torque control is selected
or the drive is powered down.
Note: For a value of 0.0, the speed change monitoring is disabled.
if the set maximum speed difference is only exceeded for one sampling time of the current controller, then an
appropriate alarm is output. However, if the maximum speed difference is exceeded over several sampling times,
then a corresponding fault is output.
p0496[0...2]

Encoder diagnostic signal selection / Enc diag select

DC_CTRL, Can be changed: U, T
DC_CTRL_R,
Data type: Integer16
DC_CTRL_R_S,
P-Group: Encoder
DC_CTRL_S
Not for motor type: -
Min
0
Description: Selects the trace signal to be output in r0497, r0498 and r0499 for encoder diagnostics.
Value: 0:
1:
10:
11:
12:
13:
14:
15:
16:
17:
SINAMICS DCM
List Manual (LH8), 02/2015, 6RX1800-0ED76
Inactive
r0497: Mechanical revolution
r0498: Raw value track A, r0499: Raw value track B
r0498: Fine position X (-A/2), r0499: Fine position Y (-B/2)
r0498: Fine position Phi, r0499: -
r0498: Offset correction X, r0499: Offset correction Y
r0498: Phase correction X, r0499: Amplitude correction Y
r0498: Cubic correction X, r0499: Fine position X
r0498: oversampling channel A, r0499: oversampling channel B
r0498: fan-out amount, r0499: fan-out number
Calculated: CALC_MOD_REG
Dyn. index: -
Unit group: -
Scaling: -
Max
210000.00 [rpm]
Calculated: -
Dyn. index: -
Unit group: -
Scaling: -
Max
86
2 Parameters
2.2 List of parameters
Access level: 3
Func. diagram: -
Unit selection: -
Expert list: 1
Factory setting
0.00 [rpm]
Access level: 4
Func. diagram: -
Unit selection: -
Expert list: 1
Factory setting
0
91