Siemens SINUMERIK 840D Description Of Functions page 260

4 Data Descriptions
4.3 Interface signals
incorrectly configured, there is a delay up to the time
$MC_ESR_DELAY_TIME1 and $MC_ESR_DELAY_TIME2 compared to STOP
D until the braking operation is initiated.
After these times have expired, braking is initiated at the current limit.
An external STOP E in contrast to the other external stops, results in Alarm
27020, which can only be acknowledged with a reset. The program cannot be
directly continued, since retraction from the desired contour was performed by
the configured ESR. The reset required must also be taken into consideration
for the test stop sequence.
Description of signals from the monitoring channel
SGA When internal pulse cancellation is used, the pulses are cancelled without
external pulse enable using the NCK I/O for the drive module involved (currently only possible for
(from axis only) 611D Performance 2 modules). If bit 30 is set in
$MA_SAFE_PULSE_ENABLE_OUTPUT, the pulses are internally cancelled.
SGA This SGA is used by the drive monitoring channel to signal the status of the
SBH and SG functions in the following way:
SBH/SG active
0 signal:
1 signal:
SGA This SGA controls terminal 663 to enable signals for the drive.
enable pulses
(from axis only)
SGA After the shutdown path test has been initiated via the SGE "test stop selection"
status, pulses or if a limit-value is violated with a resulting STOP A response, this signal is
are cancelled output to indicate that the drive pulses have been internally cancelled (refer to
Chapter 3 "Shutdown paths").
(from drive only)
0 signal: Pulses are enabled
1 signal: Pulses are cancelled
SGA This SGA indicates whether the relevant axis/spindle is safely referenced (refer
axis safely referenced to Chapter 3.11.2, "Adjustment, calibration, axis states and previous history").
0 signal:
1 signal:
SGA These signals are used to indicate which plus or minus cam of cam pair 1, 2, 3
SN1+, SN1- or 4 is "actuated".
SN2+, SN2-
0 signal:
SN3+, SN3-
SN4+, SN4-
1 signal:
4-260
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
SBH/SG is not active
SBH/SG is active
Axis is not safely referenced
Axis is safely referenced
Axis/spindle is located to the left of the cam
Axis/spindle is located to the right of the cam
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11.03