Testing The Shutdown Paths - Siemens SINUMERIK 840D Description Of Functions

11.03
Start
STOP A
>=
Timer
"Pulse
disabled
status"
Pulses
disabled
status
&
External
pulse supression
NCK-CPU
Fig. 3-4 Shutdown path of NCK CPU via internal pulse cancellation
Activating Activation is carried out by configuring the SGAs "enable pulses" and "enable
pulses externally" and the SGE "test stop external shutdown".
If bit 30 is set in $MA_SAFE_PULSE_ENABLE_OUTPUT, the pulses are
internally cancelled. In this case, MD
$MA_SAFE_EXT_PULSE_ENAB_OUTPUT must also be configured so that
the NCK has a further option for canceling pulses. However, this path is only
used if the internal pulse cancellation fails.
$MA_SAFE_PULSE_ENABLE_OUTPUT can still be configured on a hardware
output or in the SPL (refer to Chapter 3.10).
This can be used, for example, in order to initiate responses in the SPL while
canceling the pulses, and not having to wait until the state "pulses are
cancelled" has been detected.
3.1.3

Testing the shutdown paths

Description The test stop carries out a test of the entire shutdown path plus external wiring
for each monitoring channel. In the course of the test, the comparators and stop
modules of the two monitoring channels that are responsible for the stop
function are processed in succession. Also refer to Chapter 2.6.3 "Forced
checking procedure".
When must a test stop The shutdown paths must be tested (forced checking procedure) at a suitable
be carried out? time after the machine has been powered-up and thereafter in set-up mode
once every eight hours. It is advisable to carry out the test before the protective
device is opened or
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
SGE Test stop selection
SGE Test external pulse disabling
Inputs
Enable SGA pulses external
&
Outputs
Internal
pulse
suppression
Drive bus
Drive closed-loop control
3 Safety-Related Functions
3.1 Basic mechanisms of SI functions
(via NCK I/Os or SPL)
(via NCK I/Os or SPL)
Terminal 663
>=
Relay
+5V
drive_IMP
0V
Safety
relay
0V 0V
+24V
AS1 AS2
3-61