Example: Interface To The S7 Safety Program - Siemens SINAMICS G120 Function Manual

3.3.9

Example: Interface to the S7 safety program

When you configure the hardware in STEP 7, you assign the control word and status word in
the PROFIsafe profile of the inverter to specific output and input addresses of the SIMATIC
controller. In the section Configuring communication in STEP 7 (telegram 30) (Page 100),
start address 14, for example, was assigned. This results in the following assignments
between the I/O addresses and inverter signals for this example:
Table 3- 12
I/O address
A14.0
A14.1
A14.4
A14.7
A15.1
A15.2
Table 3- 13
I/O address
E14.0
E14.1
E14.4
E14.7
E15.1
E15.2
A detailed description of the PROFIsafe interface can be found in the section Control word 1
and status word 1 (Extended Safety) (Page 97).
Safety Integrated Function Manual, SINAMICS G120 and G120C
Function Manual, 01/2011, FW 4.4, A5E03052391B AB
Control word 1
Meaning
STO
SS1
SLS
Internal event ACK
Select SLS level bit 0
Select SLS level, bit 1
Status word 1
Meaning
Power removed
SS1 active
SLS active
Internal event
Active SLS level, bit 0
Active SLS level, bit 1
3.3 Activation via PROFIsafe
Comment
1 Deselect STO
0 Select STO
1 Deselect SS1
0 Select SS1
1 Deselect SLS
0 Select SLS
1 Acknowledge with signal change 1 → 0
0 No acknowledgement
Selection of the SLS level
Comment
1 The motor torque has been switched off safely.
0 The motor torque has not yet been switched off
safely.
1 The motor is currently being braked with the SS1
ramp-down time.
0 SS1 ramp-down time is not active.
1 The motor speed is currently below the selected
SLS limit value.
0 SLS not active
1 The inverter has detected an internal fault and
responded accordingly, e.g. with a STOP A.
0 Fault-free operation
Active SLS level
Interfaces
103