Siemens SINUMERIK 840D sl Series Diagnostics Manual page 681

08/2005
Cause: The filtered (steady-state) value of the line supply voltage is less than the fault threshold
(p0283).
Alarm condition: Vrms < p0283 * p0210.
Fault value (r0949, floating point):
Actual steady-state line supply voltage.
See also: p0283
Remedy: - check the line supply.
- check the line supply voltage (p0210).
- check the fault threshold (p0283).
206105 <location>Infeed: Line undervoltage
Reaction: NONE
Acknowledge: NONE
Cause: The filtered (steady-state) value of line supply voltage is lower than the alarm threshold
(p0282).
Alarm condition: Vrms < p0282 * p0210.
Alarm value (r2124, floating point):
Actual steady-state line supply voltage.
See also: p0282
Remedy: - check the line supply.
- check the line supply voltage (p0210).
- check the alarm threshold (p0282).
206200 <location>Infeed: Failure of one or several line phases
Reaction: OFF2 (OFF1)
Acknowledge: IMMEDIATELY (POWER ON)
Cause: Failure of one or several line phases.
The fault can be output in two operating states:
1. During the power-on phase of the infeed unit.
The measured line supply angle deviates from the regular characteristic for a 3-phase
system - the PLL cannot be synchronized.
2. While the infeed is operational.
After a voltage dip has been detected (A06205) in one or several line phases a fault
occurred within 100 ms (also refer to other relevant messages).
Probable causes of the fault:
- voltage dip on the line side or phase phase failure lasting longer than 10 ms.
- overload condition on the load side with peak current.
- commutating reactor missing.
Remedy: - check the line supply and fuses.
- check the connection and size (rating) of the line commutating reactor.
- check the load.
See also: p3463
206205 <location>Infeed: Voltage dip in at least one line supply phase
Reaction: NONE
Acknowledge: NONE
Cause: Voltage dip or overvoltage in one or several line supply phases has been detected in
operation.
The pulses are then cancelled for 10 ms. The ready signal of the infeed unit in r0863.0
remains and the pulse inhibit due to the phase failure is displayed in r3405.2.
Alarm value (r2124, decimal):
Internal fault type of the line angle characteristic.
Remedy: - check the line supply and fuses.
- check the line supply quality and system fault level.
- check the load.
See also: r3405, p3463
© Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
Overview of Alarms
2-681