Delta VFD17AME43ANNAA User Manual

Chapter 15 Safe Torque Off FunctionME300
15-5
15-4 Failure Rate of the Drive Safety Function
Refer to Table 3 for the relevant safe loop parameters.
Item Definition Standard Performance
SFF Safe failure fraction IEC61508
S1–DCM = 88.35%
S2–DCM = 88.2%
HFT (Type A subsystem) Hardware fault tolerance IEC61508 1
SIL Safety integrity level
IEC61508 SIL 2
IEC62061 SILCL 2
PFH
Average frequency of
dangerous failure [h-1]
IEC61508
1.36 x 10
-9
PFD
av
Probability of dangerous failure
on demand
IEC61508
5.99 x 10
-6
PTI Proof test interval IEC61508 1 year
Category Category ISO13849-1 Category 3
PL Performance level ISO13849-1 d
MTTF
d
Mean time to dangerous failure
ISO13849-1 High
DC Diagnostic coverage ISO13849-1 Low
Table 3: Relevant safe loop parameters
15-5 Reset the Parameter Settings
Use Pr.06-44 to specify the reset method when an STO alarm occurs.

STO Latch Selection
Default: 0
Settings 0: STO Latch
1: STO no Latch
 Pr.06-44 = 0: STO Alarm Latch. After you clear the cause of the STO Alarm, use a Reset command
to clear the STO Alarm.
 Pr.06-44 = 1: STO Alarm no Latch. After you clear the cause of the STO Alarm, the STO Alarm
clears automatically.
 All of the STL1–STL3 errors are “Alarm Latch” mode (in STL1–STL3 mode, the Pr.06-44 function
is not effective).

Delta VFD17AME43ANNAA Specifications

General

Brand	Delta
Model	VFD17AME43ANNAA
Category	DC Drives
Language	English