Siemens SINUMERIK 840D sl Function Manual page 129

05.08
Stop response sequence
If a stop response is initiated in the drive, a signal is sent to the NC that responds
by initiating the same stop response (two–channel safety). Likewise, if a stop re-
sponse is initiated in the NC, the drive is automatically signaled and responds by
requesting the same stop response.
This mechanism ensures that stop responses are managed with a high degree of
safety.
External stops
Using this function, the user can stop the drive using SGEs.
The drives can be brought to a standstill in the following ways:
S By canceling the drive pulses SGE "deselect ext. STOP A"
S Braking with n
S Braking along a path
S Initiate an ESR
Enabling and activating the function
The function "external STOPs" is enabled and activated using the following ma-
chine data:
S Enabling the function
MD 36901/parameter p9501: $MA_SAFE_FUNCTION_ENABLE/
"SI motion, enable safety functions"
Bit 0:
Bit 6:
Bit 4:
Note
S In addition to enabling the function "external STOPs", function SBH/SG must
also be enabled as a minimum requirement.
S The external STOP E must be enabled with bit 4 = 1 in addition to bit 6 "enable
external STOPs".
Configuring NCK–SGEs
for 840D sl:
MD 36977: $MA_SAFE_EXT_STOP_INPUT[n]:
(input assignment, external stop request) with n = 0, 1, 2, 3.
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
= 0
set
Enable SBH/SG (see note)
Enable external STOPs
Enable external STOP E
Safety Functions Integrated in the System/Drive
SGE "deselect ext. STOP C"
SGE "deselect ext. STOP D"
SGE "deselect ext. STOP E"
6.3 Safe Stops A–F
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