Lenze ELCAMZIxxx4SNNPSNN (LCU122) - Manual (Page 125)

Safety engineering
Safety functions
Safe PROFIsafe connection
7

125 EDSLCMX3024-SPS EN 5.0
7.5.5 Safe PROFIsafe connection
7.5.5.1 Conditions
Condition for using the function:
ƒ Software version 20
ƒ PROFIBUS communication must be established. ( 42)
ƒ PROFIsafe protocol according to ”PROFIsafe - Profile for Safety Technology”
specification, version 1.30, of the PROFIBUS user organsation (PUO)
ƒ The device must receive PROFIBUS data telegrams from a master controller.
7.5.5.2 Response times
In order to detect the response time to a safety function request, the entire system must
be considered. The following is relevant:
ƒ Response time of the connected sensors.
ƒ Input delay of the safety inputs.
ƒ Internal processing time.
ƒ Monitoring time for the cyclic service in the PROFIBUS.
ƒ Monitoring time of the PROFIsafe in the safety PLC.
ƒ Processing time in the safety PLC.
ƒ Delay times due to further components.
μC
μC
S SF
t = 0
t
1
t
2
0
1
t
ps
t
4
2
PROFIBUS
t
3
t
5
lcu12x_352
Fig.7-6 Response times to the request of a safety function

Device
 Drive-based safety
 Safety PLC
μ C Microcontroller
S Safety sensor technology
SF Activated safety function