Siemens SINUMERIK 840D Description Of Functions page 311

11.03
Response Alarm display
Interface signals are set
Remedy Note the supplementary conditions of the brake test, refer to supplementary
info.
Program continuation Clear the alarm with the Clear key or with NC START.
27000
Axis %1 is not safely referenced
Parameter %1 axis number
Explanation There are two reasons for this alarm:
- the user has still not acknowledged the machine position,
- the machine position has still not been verified by subsequent referencing.
Even if the axis is already referenced, there is no acknowledgement that
referencing has supplied the correct result. For example, incorrect results can
occur if the axis was moved after the control was powered-down, with the result
that the standstill position saved prior to powering-down is no longer correct. To
make sure that this does not happen, the user must acknowledge the displayed
actual position after the first referencing process.
When the user agreement has first been set, the axis must be subsequently
referenced each time that the control is run-up (with absolute encoders, this
subsequent referencing is automatically executed). This procedure is carried
out to verify the standstill position saved prior to powering-down the control.
The alarm display can be set using MD
$MN_SAFE_ALARM_SUPPRESS_LEVEL (MD>=3) so that the group alarm
27100 is displayed for all SI axes.
Response Alarm display
The SGA "Axis safely referenced" is not set. SE is disabled if the safety actual
position has not yet been acknowledged by user agreement. If user agreement
is set SE remains active. The safe cams are calculated and output, but their
significance is limited because referencing has not been acknowledged.
Remedy Move the axis to a known position, change to the "Referencing" mode and
press the softkey "Agreement". Check the positions displayed in the agreement
diagram at the machine. If these correspond to those expected at the known
positions, confirm this using the toggle key. If the user agreement has already
been set, reference the axis again.
The user agreement can only be changed in key-actuated switch setting 3 or
after entering a password.
WARNING:
If the axis has not been safely referenced and there is no user agreement, then
the following applies:
- the safe cams are still not safe
- the safe limit positions are still not active
Program continuation The alarm display disappears together with the cause of the alarm. No further
operator action necessary.
!
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
Warning
If the axis has not been safely referenced and there is no user agreement,
then the following applies:
- the safe cams are still not safe
- the safe limit positions are still not active
6.1 Alarms for SINUMERIK 840digital
6 Alarms
6-311