Danfoss VLT FC 280 Operating Manual page 95

VLT® Midi Drive FC 280
Operating Guide
Error Description
code
121 F-parameter error.
122 Data inconsistent in received F-parameter block (CRC1
error).
123 Inconsistent iParameters (iParCRC error).
124 Transmission error: data inconsistent (CRC2 error).
125 Transmission error: timeout (F_WD_Time).
126 CGP is not supported in F-module.
6.11 Safety Technical Data
6.11.1 Condition and Assumption
The Failure Modes, Effects, and Diagnostic Analysis (FMEDA) is performed based on the following assumptions:
• VLT® Midi DriveFC 280 takes 20% of the total failure budget for an SIL3 safety loop.
• Failure rates are based on the Siemens SN29500 database.
• Failure rates are constant; wear-out mechanisms are not included.
• For each channel, the safety-related components are considered to be of type B with a hardware fault tolerance of 0.
• The stress levels are average for an industrial environment and the working temperature of components is up to 85 °C (185 °F).
• A safe error (for example output in safe state) is repaired within 8 hours.
• No torque output is the safe state.
6.11.2 Safety Technical Data
Table 45: Safety Functions via Digital Input (T37/T38)
Safety standards E/E/PE
Machinery system
E/E/PE in machinery system
Drive
Safety functions
STO
SS1-t
Safety performance
ISO 13849-1
Category
Diagnostic coverage (DC)
Mean time to dangerous failure (MTTF
Performance level
IEC 61508/IEC 61800-5-2/IEC 62061
Safety Integrity Level
SIL Claim Limit (SIL CL)
Danfoss A/S © 2022.02
Reason
The received F-parameter
is invalid.
–
–
–
–
–
IEC 61508
ISO 13849-1
IEC 62061
IEC 61800-5-2
IEC 61800-5-2
Cat.3
90%<DC
) 350 years (high)
D
PL e
SIL3
AQ381425076031en-000101 / 130R1223 | 95
Safety Functions
Action
Check the F-parameter in
F-host.
–
–
–
–
–
<99% (medium)
avg