Siemens Sinumerik 840D sl Diagnostic Manual page 738

Overview of Alarms
SINAMICS-Alarms
207086 <location>Units changeover: Parameter limit violation due to reference
value change
Message Parameter: %1
value:
Drive object: A_INF, B_INF, S_INF, SERVO, TM41, VECTOR
Reaction: NONE
Acknowledge: IMMEDIATELY
Cause: A reference parameter was changed in the system. This resulted in the fact that for the parameters
involved, the selected value was not able to be written in the per unit representation (cause: e.g. the
steady-state minimum/maximum limit or that defined in the application was violated). The values of
the parameters were set to the corresponding violated minimum/maximum limit or to the factory set-
ting.
Fault value (r0949, parameter):
Diagnostics parameter r9450 to display the parameters that were not able to be re-calculated.
See also: p0304, p0305, p0310, p0596, p2000, p2001, p2002, p2003, r2004
Remedy: Check the adapted parameter value and if required correct.
See also: r9450 (Reference value change parameter with unsuccessful calculation)
207087 <location>Drive: Encoderless operation not possible for the selected
pulse frequency
Message Parameter: %1
value:
Drive object: SERVO
Reaction: NONE
Acknowledge: IMMEDIATELY
Cause: Encoderless operation is not possible for the selected pulse frequency (p1800).
Encoderless operation is activated under the following conditions:
- the changeover speed for encoderless operation (p1404) is less than the maximum speed (p0322).
- a control type with encoderless operation has been selected (p1300).
- encoder faults of the motor encoder result in a fault response with encoderless operation (p0491).
See also: p0491, p1300, p1404, p1800
Remedy: Increase the pulse frequency (p1800).
Note:
In encoderless operation, the pulse frequency must be at least as high as half the current controller
clock cycle (1/p0115[0]).
207088 <location>Units changeover: Parameter limit violation due to units
changeover
Message Parameter: %1
value:
Drive object: A_INF, B_INF, S_INF, SERVO, TM41, VECTOR
Reaction: NONE
Acknowledge: IMMEDIATELY
Cause: A changeover of units was initiated.
Possible causes for the violation of a parameter limit are:
- when rounding off a parameter corresponding to its decimal places, the steady-state minimum or
maximum limit was violated.
- inaccuracies for the data type "Floating Point".
In these cases, when the minimum limit is violated then the parameter value is rounded up and when
the maximum limited is violated the parameter value is rounded down.
Fault value (r0949, interpret decimal):
Diagnostics parameter r9451 to display all parameters whose value had to be adapted.
See also: p0100 (IEC/NEMA mot stds), p0349 (System of units, motor equivalent circuit diagram
data), p0505 (Selecting the system of units), p0595 (Selecting technological units)
Remedy: Check the adapted parameter values and if required correct.
See also: r9451 (Units changeover adapted parameters)
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SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
© Siemens AG 2009 All Rights Reserved
03/2009