Siemens SINUMERIK 840D sl Function Manual page 318

Data descriptions
9.1 Machine data for SINUMERIK 840D sl
10060
MD number
Default value:1
Change becomes effective after: POWER ON
Data type: DWORD
Meaning:
Special cases, errors,...
corresponds with..
10070
MD number
Default value: 4
Change becomes effective after: POWER ON
Data type: DWORD
Meaning:
Special cases, errors,...
corresponds with..
10071
MD number
Default value: 0.0
Change becomes effective after: POWER ON
Data type: DWORD
Meaning:
Special cases, errors,...
corresponds with..
318
$MN_POSCTRL_SYSCLOCK_TIME_RATIO
Factor for position-control cycle
Min. input limit: 1
The position control clock cycle is entered as a multiple of the time units of the basic system
clock cycle SYSCLOCK_CYCLE_TIME.
The default setting is "1". This means that the position control clock cycle corresponds to the
basic system clock cycle SYSCLOCK_CYCLE_TIME.
Setting values > 1 involves computation time for processing the additional timer interrupts by
the operating system, and should only be used in cases where a task exists in the system that
should run faster than the position controller clock cycle.
For systems with PROFIBUS DP connection, this MD represents ratio between the PROFI‐
BUS DP clock cycle and position controller clock cycle.
$MN_IPO_SYSCLOCK_TIME_RATIO
Factor for interpolator clock cycle
Min. input limit: 1
The interpolator clock cycle is entered as a multiple of the time units of the basic system clock
cycle SYSCLOCK_CYCLE_TIME.
It is only permissible to set integer multiples of the position controller clock cycle (set using
POSCTRL_SYSCLOCK_TIME_RATIO). Values, that do not represent an integer multiple of
the position controller clock cycle, are automatically increased to the next integer multiple of
the position controller clock cycle before they become effective (at the next boot).
In this case, Alarm 4102 "IPO cycle increase to [ ] ms" is output.
MD10060 POSCTRL_SYSCLOCK_TIME_RATIO
$MN_IPO_CYCLE_TIME
Interpolator clock cycle
Min. input limit: -
Interpolation time
Displays the interpolator clock cycle time (this cannot be modified !).
Internally, this is formed from the machine data SYSCLOCK_CYCLE_TIME and IPO_SYS‐
CLOCK_TIME_RATIO.
MD10050 SYSCLOCK_CYCLE_TIME
MD10070 IPOL_SYSCLOCK_TIME_RATIO
Protection level: 7/2
Protection level: 7/2
Protection level: 7/2
Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Max. input limit: 31
Unit: -
Max. input limit: 100
Unit: -
Max. input limit: -
Unit: -
Safety Integrated