Siemens Sinumerik 840D sl Function Manual page 61

Sinumerik safety integrated

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Danger as a result of brief, limited motion

If two power transistors in the Motor Module fail at the same time (one in the upper

and one in the lower bridge of the inverter), this can cause brief, limited

The maximum movement can be:

S Synchronous rotary motors: Maximum motion = 180° /pole pair number

S Synchronous linear motors: Max. movement = pole width

S The status of the Safe Torque Off function is displayed using parameters.

Enabling the Safe Torque Off function

The Safe Torque Off function is enabled via the following parameters:

S STO via terminals:

-- p9601.0 = 1, p9801.0 = 1

Selecting/deselecting Safe Torque Off

Safe Torque Off is selected as follows:

S Each monitoring channel triggers safe pulse suppression via its switch--off si-

S A motor holding brake is closed (if connected and configured).

Deselecting Safe Torque Off represents an internal safe acknowledgment. The fol-

lowing is executed if the cause of the fault has been removed:

S Each monitoring channel cancels safe pulse suppression via its switch--off si-

S The safety prompt "Close motor holding brake" is canceled.

S Any active STOP F or STOP A commands are canceled (see r9772 / r9872).

S The messages in the fault memory must also be reset using the general ack-

nowledgment mechanism.

If Safe Torque Off is deselected and selected again through one channel within the

time in p9650, the pulses are canceled but a signal is not output.

If you want a message to be displayed in this case, N01620 must be reconfigured

to be either an alarm or fault using p2118 and p2119.

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

Safety Functions integrated in the drive

4.3 Safe Torque Off (STO)

Sinamics s120