Operating Instructions Bus Module
MBM-PN-..-MLI-… (PROFINET)
10
(translation of the original operating instructions) MAN20001572-01-07/22
3.5.
Determining safety characteristics of the overall system
The corresponding reliability values must be determined for each safety function in the overall system. Proceed as follows:
1.
Refer to the data sheets or operating instructions for the system components containing the function for information on
the reliability values for the related safety function.
2.
Refer to the reliability value of the bus module MBM for the evaluation and forwarding of safety data.
3.
Add together the values to a resulting reliability value PFHD, S
ys
.
3.5.1. Calculation example for the “monitoring of guard locking” safety function
PFHD, S
ys
= PFHD,
MGB2-L
+ PFHD,
MBM
PFHD, Sys
PFHD, MBM
PFHD, MGB2-L
Guardlocking
Device
MGB2-L...
Busmodule
MBM
EUCHNER
ModuleLink
-System (
MLI
)
Safetybit
LM_FI_UK
(Guardlock monitoring)
Failsafe
PLC
3.5.2. Calculation example for the “emergency stop” safety function
PFHD,
Sys
= PFHD,
MSM device
+ PFHD,
MGB2-L
+ PFHD,
MBM
To calculate the PFHD,
MSM device
from the B10
D
value, use the method in annex C 4.2 of EN ISO 13849-1:2016.
The following applies: PFHD,
Sys
= f (category
MBM
; DC
MBM
; B10
D
; n
op
)
PFHD, Sys
PFHD, MBM
PFHD, MGB2-L
MGB2-L...
Busmodule
MBM
Submodule
MSM
with
B10D-Device
EUCHNER
ModuleLink
-System (
MLI
)
Safetybit
SM_FI_ES
(e.g. Emergency Stop)
PFHD, MSM-Device
Failsafe
PLC