Measuring System Changeover - Siemens Sinumerik 840D sl Function Manual

Sinumerik safety integrated

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Measuring system changeover

When measuring systems are changed--over (selected) via interface signals

"Position measuring system 1" (DB 31..., DBX1.5)

"Position measuring system 2" (DB 31..., DBX1.6) the following applies:

The encoder used by the position controller is changed--over.

SI continues to work with the configured encoder.

Stop responses Stop A, B, C for gantry axes are initiated as fast as possible for all

of the axes in the group. However, if unacceptable offsets result because of the

differing braking behavior of the axes, then stop response Stop D should be con-

Parking axis

When the park state is activated (using the interface signal "parking"), then the

system automatically cancels the pulses using an external STOP A. After the park

state has been removed, the external STOP A is automatically deactivated again.

When the "parking" function is selected, actual value acquisition and the position

measuring system monitoring are deactivated for an axis/spindle. The NCK actual

value is frozen and mechanical actual value changes are no longer detected. This

also applies to the actual value acquisition of the two safety monitoring channels

NCK and SINAMICS S120. This means that all of the actual value related safety

motion monitoring functions (SBH, SG, n<nx, SBR, SE, SN) are ineffective.

The user can align the actual value acquisition of the safety monitoring channels

after re--selecting parking by again referencing/synchronizing to the machine posi-

SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition

Interaction with other functions

11.3 Measuring system changeover

Sinamics s120