Siemens SINUMERIK 840D Description Of Functions page 101
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11.03
The active speed limit value (SG 1, 2, 3 or 4) is selected via SGEs "SG
Selecting SG
selection bits 1 and 0". The desired override is selected by combining SGEs
overrides
"Override selection bits 3, 2, 1 and 0". The override is only valid for the speed
limit value for SG2 and SG4.
Table 3-26
Selecting SG override values for safely-reduced speeds
SG
SG
SG
Selection
Selection
Override
Bit 1
Bit0
Selection
Bit 3
= 0
= 0
x
= 0
= 1
= 0
- " -
= 0
- " -
= 0
- " -
= 0
- " -
= 0
- " -
= 0
- " -
= 0
- " -
= 0
- " -
= 1
- " -
= 1
- " -
= 1
- " -
= 1
- " -
= 1
- " -
= 1
- " -
= 1
- " -
= 1
= 1
= 0
x
= 1
= 1
= 0
- " -
= 0
- " -
= 0
- " -
= 0
- " -
= 0
- " -
= 0
- " -
= 0
- " -
= 0
- " -
= 1
- " -
= 1
- " -
= 1
- " -
= 1
- " -
= 1
- " -
= 1
- " -
= 1
- " -
= 1
x: Signal status is optional since override values are not effective for SG1 and SG3
Configuring
NCK SGEs (override selection bits 3, 2, 1, 0) are configured using the following
machine data:
NCK SGEs
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
SGE
SG
SG
Override
Override
Selection
Selection
Bit 2
Bit 1
x
x
= 0
= 0
= 0
= 0
= 0
= 1
= 0
= 1
= 1
= 0
= 1
= 0
= 1
= 1
= 1
= 1
= 0
= 0
= 0
= 0
= 0
= 1
= 0
= 1
= 1
= 0
= 1
= 0
= 1
= 1
= 1
= 1
x
x
= 0
= 0
= 0
= 0
= 0
= 1
= 0
= 1
= 1
= 0
= 1
= 0
= 1
= 1
= 1
= 1
= 0
= 0
= 0
= 0
= 0
= 1
= 0
= 1
= 1
= 0
= 1
= 0
= 1
= 1
= 1
= 1
3 Safety-Related Functions
3.5 Safely-reduced speed (SG)
SG
Meaning
Override
Selection
Bit 0
x
Speed limit value for SG1 active
= 0
Speed limit value for SG2 active
with override 0
= 1
... with override 1
= 0
... with override 2
= 1
... with override 3
= 0
... with override 4
= 1
... with override 5
= 0
... with override 6
= 1
... with override 7
= 0
... with override 8
= 1
... with override 9
= 0
... with override 10
= 1
... with override 11
= 0
... with override 12
= 1
... with override 13
= 0
... with override 14
= 1
... with override 15
x
Speed limit value for SG3 active
= 0
Speed limit value for SG4 active
with override 0
= 1
... with override 1
= 0
... with override 2
= 1
... with override 3
= 0
... with override 4
= 1
... with override 5
= 0
... with override 6
= 1
... with override 7
= 0
... with override 8
= 1
... with override 9
= 0
... with override 10
= 1
... with override 11
= 0
... with override 12
= 1
... with override 13
= 0
... with override 14
= 1
... with override 15
3-101
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