Lenze i750 User Manual

Calculaon of the ma
ximum response mes
For the calculaon of the response me to the request of a safety funcon, the overall system
must be taken into account:
•
R
esponse me of the connected safety sensors.
•
Input delay of the safety inputs.
•
Internal processing me.
•
Deceleraon mes, braking mes, and stopping mes from the parameterized safety
funcons.
•
When using a feedback system, the response me of encoder monitoring 0x2878:004
•
Safety bus:
-
Monitoring me for cyclic services.
-
Monitoring me in the safety PLC.
-
Processing me in the safety PLC
•
Delay mes due to further components.
The ETG FSoE protocol specic
aon contains formulas for calculang the maximum response
me in fault-free operaon and in the event of a fault.
In the "Applic
aon Knowledge Base", Lenze provides an Excel table as a
calculaon aid. This can be used to easily calculate the reacon mes.
Link to "Applicaon Knowledge Base"
Please note the following:
The variables for the individual response mes ar
e named dierently in the documentaon
for the c250-S safety controller than in the FSoE protocol specicaon of the ETG.
In the following graphics, the dierences are marked with "Lenze" and "ETG".
Denion of the single response mes
Name Lenze Name ETG Descripon Comment
T_Sensor T_S Processing me of the sensor unl the
signal is a
vailable at the interface.
See technical data of the sensor
T_InputFilter Parameterized lter me of the safe
input.
T_Input T_I Processing me of the safe input. E.g. safety I/O module, FSoE sensor or inverter.
See technical data
T_WDInput T_WD_In Monitoring me parameterized in the
safety PLC (c250-S) for the safe input
module.
E.g. safety I/O module, FSoE sensor or inverter.
T_EtherCAT T_Com EtherCAT cycle me
T_FSoE Processing me of the communicaon,
depending on the EtherCAT cycle me
The documentaon of the c250-S species max. 3 x T_EtherCAT.
The ETG FSoE protocol specicaon species max. 2 x T_Com.
It depends on the applicaon which factor can be used. Factor 3
means improved availability of secure communicaons.
T_SafetyPLC T_L Processing me of the safety PLC (c250-S). Corresponds to the set cycle me of the safety applicaon.
T_Output T_O Processing me of the safe output. E.g. safety I/O module or inverter.
See technical data
T_WDOutput T_WD_Out Monitoring me parameterized in the
safety PLC (c250-S) for the safe output
module.
E.g. safety I/O module or inverter.
T_Aktor T_A Processing me of the actua
tor. See technical data of the actuator
Maximum response me with error-free communicaon
Note the di
erent factors for calculang the processing me of the
communicaon:
The documentaon of the c250-S species max. 3 x T_EtherCAT.
The ETG FSoE protocol specicaon species max. 2 x T_Com.
It depends on the applicaon which factor can be used. Factor 3 means
improved availability of secure communicaons.
Funconal sa
fety
Technical data
Calculaon of the maximum response mes
158

Lenze i750 Specifications

General

Brand	Lenze
Model	i750
Category	Inverter
Language	English