Siemens SINUMERIK 840D Description Of Functions page 220

4 Data Descriptions
4.1 Machine data
36926 $MA_SAFE_ENC_FREQ_LIMIT
MD number Encoder frequency for safe operation
Default: 300000
Change becomes effective after POWER ON:
Data type: DWORD
Meaning Encoder frequency above which amplitude monitoring is disabled. A speed corresponding
to this frequency may not be exceeded in safe operation. If the encoder frequency is
exceeded in safe operation (SBH or SG), the stop response parameterized for the active
monitoring function is triggered.
For Performance-2 control modules, High Standard and High Performance, this frequency
can be set higher than 300 kHz.
Parameterization errors are flagged with Alarm 27033.
36930 $MA_SAFE_STANDSTILL_TOL
MD number Standstill tolerance
Default: 1 mm
Change becomes effective after POWER ON:
Data type: DOUBLE
Meaning The tolerance for the safe operating stop is set in this data.
If the difference between the position reference value and position actual value is greater
than the tolerance set here when safe operating stop is selected, then the control system
activates Alarm 27010 with STOP A or B.
Corresponds with ... MD 36956: $MA_SAFE_PULSE_DISABLE_DELAY
36931 $MA_SAFE_VELO_LIMIT[n]
MD number Limit value for safely-reduced speed
Default: 2 000 mm/min
Change becomes effective after POWER ON:
Data type: DOUBLE
Meaning The limit values for safely-reduced speeds 1, 2, 3 and 4 are set in this data.
When SG1, SG2, SG3 or SG4 is selected and the current speed exceeds the limit set
here, then the control system activates Alarm 27011 with the stop response configured in
$MA_SAFE_VELO_STOP_MODE.
n = 0, 1, 2, 3 stand for limit value of SG1, SG2, SG3, SG4
Special cases, errors With active SBH/SG and a 1-encoder system, the speed is monitored on the basis of an
encoder limit frequency of 200kHz (300 kHz from SW 4.2). An appropriate alarm is output
when the limit is exceeded.
Corresponds with ... MD 36961: $MA_SAFE_VELO_STOP_MODE
36932 $MA_SAFE_VELO_OVR_FACTOR[n]
MD number Override factor for SG
Default: 100
Change becomes effective after POWER ON:
Data type: DWORD
Meaning Using SGEs it is possible to select overrides for safely-reduced speeds 2 and 4 and to set
the associated override value (percentage) in this machine data.
n = 0, 1, ... , 15 stand for overrides 0, 1, ... 15
Application $MA_SAFE_VELO_OVR_FACTOR[0]=30
$MA_SAFE_VELO_OVR_FACTOR[1]=50
$MA_SAFE_VELO_OVR_FACTOR[2]=80
$MA_SAFE_VELO_OVR_FACTOR[3]=100
Depending on whether override 0, 1, 2 or 3 is selected, safely-reduced speeds 2 and 4
are monitored for 30, 50, 80 or 100% of the set limit value.
•
Special cases, errors
•
Corresponds with ...
MD 36978: $MA_SAFE_OVR_INPUT[n]
MD 36931: $MA_SAFE_VELO_LIMIT[n]
References Refer to Chapter 3, "Override for safely-reduced speed"
4-220
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
Min. input value: 300000
Protection level (R/W) 7/2
Applies from SW 6.3
Min. input value: 0
Protection level (R/W) 7/2
Applies from SW 3.4
Min. input value: 0
Protection level (R/W) 7/2
Applies from SW 3.4
Min. input value: 1
Protection level (R/W) 7/2
Applies from SW 4.2
The "Override for safely-reduced speed" function is enabled via MD 36901
(MD 1301):
This override is not applied to the limit values for safely-reduced speeds 1 and 3.
Max. input value: 420000
Unit: freq.
Max. input value: 100
Unit: mm, inches, degrees
Max. input value: *
Unit: mm/min
inch/min, rev./min
Max. input value: 100
Unit: %
(Override 0)
(Override 1)
(Override 2)
(Override 3)
© Siemens AG 2003 All Rights Reserved
11.03
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