Siemens SINAMICS G120 CU240B-2 - Page 227

Functions
7.10 Safe Torque Off (STO) safety function
Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA
227
Function table
Fill in the following table for your machine.
Mode of operation Safety device Drive Controlling the safety
function
Status of the safety
function
… … …
…
…
…
…
…
… … …
…
…
…
…
…
Table 7- 40 Example:
Mode of operation Safety device Drive Controlling the safety
function
Status of the safety
function
Protective door closed and
locked
1
2
-
-
not active
not active
Production
Protective door unlocked 1
2
F-DI 0
PROFIsafe
STO active
STO active
Protective door closed and
locked
1
2
-
PROFIsafe
not active
STO active
Setup
Protective door unlocked 1
2
F-DI 0
PROFIsafe
STO active
STO active
The following is checked during the function test:
● The hardware is functioning properly.
● The digital inputs of the inverter are assigned correctly for the safety function.
● The PROFIsafe address of the inverter is set correctly.
● The safety function is parameterized correctly.
● Routine for forced dormant error detection of the switch-off signal paths on the Control
Unit.
Note
Perform the acceptance test with the maximum possible speed and acceleration.
Procedure
Table 7- 41 "Safe Torque Off" (STO) function
No. Description Status
Initial state:
 The inverter is in "Ready" state (p0010 = 0).
 The inverter indicates neither faults nor alarms for safety functions (r0945, r2122, r2132).
1.
 STO is not active.