Acknowledging; Overview - Siemens SINUMERIK MC Commissioning Manual

7.9

Acknowledging

7.9.1

Overview

Most safety messages require safety-relevant acknowledgment.
Safety-relevant acknowledgment involves deleting safety-relevant messages of the drive-
integrated monitoring functions via safety-relevant communication. With the safety-related
acknowledgment, the fault case in the drive is marked as having been resolved (gone).
Safety-relevant acknowledgment is independent of the scope of the Safety Integrated
Functions used (Basic or Extended) - and is required in addition to actually removing the cause
of the fault.
Depending on the drive type, different types of acknowledgment and/or safety-relevant
acknowledgment are possible:
Table 7-8
Drive type
External NC drives
External SINAMICS drives
without any assignment to an
NC axis
Depending on what has been configured, additional acknowledgments may be necessary:
● If you are using Basic Functions, or the safety message buffer is deactivated (p3117=1),
then you must additionally acknowledge (Page 339) all safety messages that are saved in
the standard fault buffer using a PROFIdrive RESET.
● In addition to a safety-relevant acknowledgment, various fault situations also require
an acknowledgment using a PROFIdrive RESET (Page 338).
Unexpected restart for safety-related acknowledgment without MCP reset!
If a STOP response is acknowledged in a safety-related fashion by the machine operator, but
without PROFIdrive RESET acknowledgment, then the part program is not canceled and is
continued with the acknowledgment. When the machine restarts unexpectedly, this can put
people in dangerous situations or cause material damage.
● In the safety program logically combine safe acknowledgment (PROFIsafe IEACK) with a
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB
Permissible acknowledgment types for various drive types
WARNING
RESET at the machine control panel (PROFIdrive RESET).
Permissible acknowledgment
● Safety-relevant acknowledgment using PROFIsafe signal "IEACK"
(Page 338)
● Acknowledgment by deselecting STO or SS1 (Page 339)
● Acknowledgment by switching-off/switching-on (Page 339)
The safety message buffer is not supported and must be deactivated
(Page 336).
The acknowledgment options correspond to those of external NC
drives (see above).
Diagnostics
7.9 Acknowledging
337