Siemens SINUMERIK 840D sl Function Manual page 360

Data descriptions
9.1 Machine data for SINUMERIK 840D sl
36928
Meaning:
corresponds with ...
36929
MD number
Default value: 0
Change becomes effective after: POWER ON
Data type: DWORD
Meaning:
corresponds with ...
36930
MD number
Default value: 1.0
Change becomes effective after: POWER ON
Data type: DOUBLE
Meaning:
corresponds with ...
360
$MA_SAFE_ENC_IDENT[0...2]
Identification of the encoder evaluation of this axis used for Safety Integrated. When booting,
the encoder evaluation (drive parameter r9881) reads out this identification and compares
with the last value saved here. This MD is then overwritten. The value of this MD is incorporated
in the calculation of MD36998 $MA_SAFE_ACT_CHECKSUM[1].
r9881: SI Motion Sensor Module Node Identifier, second channel
$MA_SAFE_ENC_CONF
Configuration of the redundant actual value
Min. input limit: 0
Configuration of the redundant actual value:
Bit 0: up/down counter
= 0: Down counter
= 1: Up counter
Bit 1: Encoder CRC: processing the redundant coarse position
= 0: most significant byte first
=1: least significant byte first
Bit 2: redundant coarse position MSB/LSB justified
= 0: redundant coarse position LSB justified
= 1: redundant coarse position MSB justified
Bit 4: Binary comparison not possible
= 0: Binary comparison possible
= 1: Binary comparison not possible
When booting - for DRIVE-CLiQ encoders - this information is read-out of drive parameter
r0474 (the default values apply for SMI/SMC/SME encoders) and is then compared with the
last value saved here. This MD is then overwritten. Alarm 27035 is output if they are not equal.
The value of this MD is incorporated in the calculation of MD36998 $MA_SAFE_ACT_CHECK‐
SUM[1].
If, in drive parameter r0474 an unknown bit is set, then Alarm 27038 is output. The alarm
output in this position can be hidden using the MD $MN_SAFE_DIAGNOSIS_MASK, bit 3 =
1.
$MA_SAFE_STANDSTILL_TOL
Standstill tolerance
Min. input limit: 0.0
This MD specifies the tolerance for a Safe Operating Stop.
If the difference between the position limit value and position actual value is greater than the
tolerance set here when a Safe Operating Stop is selected, then the control system outputs
Alarm 27010 with STOP B.
The position limit value is the position actual value at the instant that a Safe Operating Stop
is selected.
MD36956 $MA_SAFE_PULSE_DISABLE_DELAY
Protection level: 7/-
Protection level: 7/2
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Max. input limit: 7FFFFFFFH
Unit: -
Max. input limit: 100.
Unit: mm/inch, degrees
Safety Integrated