Safe Software Limit Switches (Se); Safe Software Limit Switches - Siemens Sinumerik 840D sl Function Manual

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Safe software limit switches (SE)

The function "safe software limit switches" (SE) is also known as "safe limit

The "safe software limit switches" function (SE) can be used to implement protec-

tive functions for operating personnel and machinery or working zone/protection

zone delimination for specific axes. For example, this function can replace hard-

ware limit switches.

Two "safe software limit switches" (SE1 and SE2) are available for each axis. If the

SE function is active, limit switch position pair SE1 or SE2 can be selected as a

function of SGE "SE selection".

Defining the upper and lower limit values

The position limit values for the software limit switch position pairs 1 and 2 are

defined in the following machine data:

for 840D sl:

MD36934 $MA_SAFE_POS_LIMIT_PLUS[n]

MD36935 $MA_SAFE_POS_LIMIT_MINUS[n]

for SINAMICS S120:

p9534[n] SI Motion SLP (SE) upper limit values (Control Unit)

p9535[n] SI Motion SLP (SE) lower limit values (Control Unit)

The upper and lower position limit values must be selected so that when the axis

is traversing in this direction, the software limit switches -- that are used as

standard -- are first reached.

The most important features include:

S Software limit switches are safely defined and evaluated as a software function

S Configurable stop response when software limit switches are passed

S The stop response is implemented internally in the software (and is therefore

faster than a hardware limit switch response) when software limit switches are

passed (i.e. actuated)

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

Safety functions integrated in the system/drive

6.7 Safe software limit switches (SE)

Sinamics s120