Siemens SINUMERIK 840D Description Of Functions page 64

3 Safety-Related Functions
3.1 Basic mechanisms of SI functions
Distribution among axis channels
with same SGA assignment
C
B
A
Z
Y
X
Internal pulse suppression
Axial
e.g. for axis X and Y
SI
channels
NCK-CPU
Fig. 3-5 Configuration, "test stop external shutdown"
In order to make it easier for the user to configure a test stop and at the same
time reduce the time required for a test stop, the external pulse cancellation test
is initiated only for one axis per configured output. Axis Y is used in Fig. 3-5 as
an example. Pulse cancellation is monitored, for all axes, whose SGA is
configured at this output ($MA_SAFE_EXT_PULSE_ENAB_OUTPUT), in
Fig. 3-4 this therefore means for all 6 axes X, Y, Z, A, B, C.
Alarm 27006, "Axis %1 Test ext. pulse cancellation running" is displayed for all
of these axes during the external pulse cancellation test.
Sequence:
The sequence of the "test stop external shutdown" is comparable with the
sequence for test stop of the NCK monitoring channel.
After selecting of the "test stop external shutdown", the SGA "pulse enable
external" is cancelled and a timer started with the value from
MD $MA_SAFE_PULSE_DIS_CHECK_TIME. If the timer expires and a
checkback signal confirming that pulses have been cancelled has not been
received, Alarm 27001 with code number 1010 is issued. By initiating a STOP
A for the drive, the pulses are cancelled via the internal shutdown path. The
only way to exit this status is with a power on.
3-64
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
Inputs
SGE Test stop external disable axis Y
Outputs
SGA Enable pulses external
&
Drive bus
Note
During "test stop external shutdown", no external stop may be present at the
drive. If an external stop is present and the test stop is present for longer than
$MA_SAFE_MODE_SWITCH_TIME, Alarm 27001 is generated, "fault in a
monitoring channel" with information 58, active external stop request.
Terminal 663 Terminal 663 Terminal 663 Terminal 663
2-axis 2-axis 1-axis
module module module
X, Y Z, A B
>=
© Siemens AG 2003 All Rights Reserved
11.03
1-axis
module
C