Parker EME
Incorporation of GVI in the vehicle safety system
25
192-300300N1 GVI Frames C, D & E 2019-9
Optionally, inverters shipped for OEM series production are programmed during manufacturing with the
correct parameters and do not require any further configuration. Refer to the OEM documentation for any
further setup required during vehicle commissioning.
Setting up a prototype inverter for a new vehicle, within a vehicle development program, may require
extensive parameterization and possibly also re-programming of the inverter via the CAN bus. Refer to your
designated Parker application center for further assistance.
7.18 Incorporation of GVI in the vehicle safety system
This chapter provides the basic information for incorporation of the GVI in the vehicle’s safety system in
accordance with Annex VI in Directive 2006/42/EC (the Machinery Directive).
7.18.1. Motor controller functions
The various input/output blocks and the logic block of the GVI can be used as part of the safety function for
the complete vehicle. However, they cannot, by themselves, perform a safety function. OEM's are
responsible for ensuring that the motor controllers are used for their intended purpose only, safe function of
the system and for compliance with all applicable regulations.
See chapter 0 for a correct incorporation of the functions.
7.18.2. MTTFd
MTTFd is an extension of the MTTF calculation (mean time between failure). MTTFd is a statistical
(empirical) value defined as the expected mean time for dangerous failure (d for dangerous in MTTFd). This
value does not imply a guaranteed operating life or a failure-free time. Table 6 contains both MTTF and
MTTFd values for different functions in the GVI.
The typical values of MTTFd in annex C of ISO 13849-1 are used for calculation of the MTTFd for Parker’s
equipment.
7.18.2.1
How to apply MTTFd calculations in an application
Any function in an actual application consists of more than one block. Schematically, a function can be
illustrated as in Figure 14.
Figure 14. Principle illustration of a function
The MTFFd values for the supporting blocks have been included in the MTTFd calculation for the logic block
in the GVI. The reason is that all functionalities depend on the logic block and that the supporting blocks are
common to all functionalities.
The MTTFd for a function as illustrated in Figure 14 is calculated as:
MTTFd =
1
a
-1
+ b
-1
+ c
-1