Siemens SINUMERIK 840D Description Of Functions page 203

11.03
3.13 Behavior of Safety Integrated when the drive bus fails (from SW 6.4.15)
; Parameterization for the Y axis (AX2):
; STOP C is initiated when the SG is exceeded in SG stage 1, STOP E
; in SG stages 2, 3 and 4
$MA_SAFE_VELO_STOP_MODE[AX2] = 5; =>
$MA_SAFE_VELO_STOP_REACTION[0, AX2] = 2 ; SG stage 1
$MA_SAFE_VELO_STOP_REACTION[1, AX2] = 14 ; SG stage 2
$MA_SAFE_VELO_STOP_REACTION[2, AX2] = 14 ; SG stage 3
$MA_SAFE_VELO_STOP_REACTION[3, AX2] = 14 ; SG stage 4
; Parameterization for the Z axis (AX3):
; STOP D is initiated when the SG is exceeded in SG stage 1, STOP E
; in SG stages 2, 3 and 4
$MA_SAFE_VELO_STOP_MODE[AX3] = 5; =>
$MA_SAFE_VELO_STOP_REACTION[0, AX3] = 3 ; SG stage 1
$MA_SAFE_VELO_STOP_REACTION[1, AX3] = 14 ; SG stage 2
$MA_SAFE_VELO_STOP_REACTION[2, AX3] = 14 ; SG stage 3
$MA_SAFE_VELO_STOP_REACTION[3, AX3] = 14 ; SG stage 4
This results in the following behavior when the drive bus fails:
1.
2.
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SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
$MA_SAFE_VELO_STOP_REACTION becomes effective
$MA_SAFE_VELO_STOP_REACTION becomes effective
If SG1 is selected in any one of the three axes at the instant that the bus
fails, then the pulses are immediately cancelled for all 3 axes. This is
because terminal 663 is controlled from all 3 axes via one output and the
pulses are immediately cancelled from the axis with SG1 via this output.
If one of the SG stages 2 to 4 is selected in all three axes, then pulse
cancellation is delayed for 500 ms.
3 Safety-Related Functions
3-203