Siemens SINUMERIK 840D Description Of Functions page 319

11.03
27008
Axis %1 SW limit switch deactivated
Parameter %1 = axis number
Explanation An SI acceptance test safe end position has been started with the acceptance
test wizard at the operator panel. For these acceptance tests, the single-
channel SW limit switches are de-activated for the axis/spindle in order to
ensure that the safe limit positions can be approached.
Response Alarm display
Remedy De-select the acceptance test, e.g. using the acceptance test wizard or wait for
the end of the test.
Program continuation Alarm display disappears with alarm cause. No further operator action
necessary.
27010
Axis %1 tolerance for safe operating stop exceeded
Parameter %1 = axis number
Explanation The axis has moved too far away from the reference position. It is further away
than allowed in MD $MA_SAFE_STANDSTILL_TOL.
The alarm can be re-configured in the MD
$MN_ALARM_REACTION_CHAN_NOREADY (channel not ready).
Response Mode group not ready
Channel not ready
NC start inhibit in this channel
Interface signals were set
Alarm display
NC stop for alarm
Channel not ready
Stop the axis with speed setpoint = 0 (STOP B). As soon as the speed actual
value is less than that defined in the MD
$MA_SAFE_STANDSTILL_VELO_TOL, at the latest however, after the time in
MD $MA_SAFE_PULSE_DISABLE_DELAY expires, the pulses are cancelled
(STOP A).
Remedy Check the tolerance for the standstill monitoring: does the value match the
precision and control dynamics of the axis?
If not, increase tolerance. If yes, check the machine for damage and repair it.
Program continuation Power-down the control and power-up again.
27011
Axis %1 safely-reduced speed exceeded
Parameter %1 = axis number
Explanation The axis has moved too quickly and faster than that specified in MD
$MA_SAFE_VELO_LIMIT. When SBH/SG is active and for a 1-encoder
system, the speed, that corresponds to the encoder limit frequency saved in
MD SAFE_ENC_FREQ_LIMIT was exceeded.
Response NC start inhibit in this channel
Interface signals are set
Alarm display
NC stop for alarm
The axis is stopped with STOP A, C, D or E, depending on what has been
configured in MD $MA_SAFE_VELO_STOP_MODE or MD
$MA_SAFE_VELO_STOP_REACTION.
Remedy If no obvious operator error has occurred: Check the value entered into the
MDs, check SGEs: Was the correct safely-reduced speed selected? If the MDs
and SGEs are o.k., check the machine for any damage and rectify.
Program continuation Clear the alarm with the RESET key. Restart part program.
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
6.1 Alarms for SINUMERIK 840digital
6 Alarms
6-319