Siemens SINUMERIK 840D Description Of Functions page 239

11.03
36995 $MA_SAFE_STANDSTILL_POS
MD number Standstill position
Default value 0
Change becomes effective after POWER ON:
Data type: DWORD
Meaning The position at which the axis has currently stopped is displayed in this MD.
To be able to perform a plausibility check on the axis referencing when the control system
is powered-up the next time, the current axis position is saved permanently when the
following events take place:
•
•
Special cases, errors Any manual changes to the MD are detected the next time the control is powered-up and
the axis reference checked for plausibility. "User agreement" is required again after
referencing.
36997 $MA_SAFE_ACKN
MD number User agreement
Default: 0
Change becomes effective after POWER ON:
Data type: DWORD
Meaning The user agreement status is displayed in this machine data.
The user can confirm or cancel his "user agreement" via an appropriate screen display.
If it is internally detected in the software that the reference to the machine has been lost,
then the "user agreement" is automatically cancelled (e.g. during gear changes, or if the
plausibility comparison with the stored standstill position fails during referencing).
Special cases, errors Any manual changes to the MD are detected the next time the control is powered-up and
the axis reference checked for plausibility. "User agreement" is required again after
referencing.
36998 $MA_SAFE_ACT_CHECKSUM
MD number Actual checksum
Default: 0
Change becomes effective after POWER ON:
Data type: DWORD
Meaning The actual checksum calculated after POWER ON or for a RESET, over the current
values of safety-relevant machine data is entered here.
36999 $MA_SAFE_DES_CHECKSUM
MD number Setpoint checksum
Default: 0
Change becomes effective after POWER ON:
Data type: DWORD
Meaning This data contains the setpoint (reference) checksum of the actual values of safety-
relevant machine data that was saved during the last machine acceptance test.
37000 $MA_FIXED_STOP_MODE
MD number Travel to fixed endstop mode
Default: 0
Change becomes effective after POWER ON:
Data type: BYTE
Meaning Bit 0:
Bit 1:
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
Min. input value:
-2 147 483 647
Protection level (R/W) 0/0
Applies from SW 3.4
When safe operating stop (SBH) is selected
Cyclically when SE/SN is active
Min. input value: 0
Protection level (R/W) 7/2
Applies from SW 3.4
Min. input value: 0
Protection level (R/W) 7/-
Applies from SW 3.4
Min. input value: 0
Protection level (R/W) 7/1
Applies from SW 3.4
Min. input value: 0
Protection level (R/W) 7/1
Applies from SW
Selects "Traverse to fixed endstop" from the part program or
synchronous actions.
Selects "Traverse to fixed endstop" for the function test of the
braking mechanical system from the PLC
4 Data Descriptions
4.1 Machine data
Max. input value:
2 147 483 647
Unit: -
Max. input value: FF FF FF FF
Unit: Hexadecimal
Max. input value: FF FF FF FF
Unit: Hexadecimal
Max. input value: FF FF FF FF
Unit: Hexadecimal
Max. input value: 3
Unit: Hexadecimal
840D
840D
840D
840D
840D
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