Bosch rexroth ctrlX SAFETY SafeMotion User Manual

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ctrlX SAFETY "SafeMotion"
Safety characteristics of the safety system
Bosch Rexroth AG
R911404905,
Edition 02
The following conditions/restrictions apply to the general use of the formula for
PFH calculation for an axis:
Table 7: Variable description to calculate PFH for an axis
Variable Value Description
PFH
M5 option
Refer to ⮫ Optional safety
technology module "M5"
This value is independent of the safety functions
used and thereby independent of the safety level
to be attained.
PFH
EC option
Refer to ⮫ Optional safety
technology module "M5"
Enter “1” for this variable, if an EnDat–2.2
encoder is configured, see ⮫ Chapter Required
motors and measuring systems on page 166
1)
PFH
encoder
See manufacturer's specifica-
tion (when using Rexroth
motors, see ⮫ Chapter
Required motors and meas-
uring systems on page 166)
Use the value of the encoder connected to XG20
or XG21, if safety functions requiring an encoder
are used. Otherwise, enter “0” for this variable.
PFH
SBC function, brake 1
Refer to ⮫ Optional safety
technology module "M5"
Enter “0” for this variable if the safety function
“SBC” is not used for brake 1.
31)
PFH
Brake 1
See manufacturer's specifica-
tion (when using Rexroth
motors, see ⮫ Chapter
Required motors and meas-
uring systems on page 166)
Use the value of the connected brake, if the
safety function “SBC” is used.
If the safety function “SBC” is not used, enter “0”
for this variable.
Legend:
1): PFH=(1-DC)/MTTFD
2): CCF factor: 1%
3): PFH=λ
D
6.4.4
Calculating the total PFH value of a safety zone
To determine the required total PFH value of an axis or a safety zone, the
PFH values of the individual axes and of the required third-party components
have to be used for calculation. The figure below illustrates all the components
relevant to the calculation:
Fig. 4: SafeMotion: Determining the PFH for a safety zone
1)
Third-party component
2)
Not yet possible
To calculate the PFH value of a safety zone, a valid PFH value has to be available
for all components which have an influence on the safety function (if necessary,
procure the PFH value from the component manufacturer).
Table 8: SafeMotion: Formula to calculate PFH for a safety zone
PFH
Safety zone
= PFH
Discrete_selection
+ PFH
Axis_1
+ PFH
Axis_2
+…+ PFH
Axis_n
The following conditions/restrictions apply to the general use of the formula for
PFH calculation for a safety zone:
Product presentation

Bosch rexroth ctrlX SAFETY SafeMotion Specifications

General

Brand	Bosch
Model	rexroth ctrlX SAFETY SafeMotion
Category	Service Equipment
Language	English