Siemens 6MD85, Manual

Page: 975 / 1256

Supervision of the Device Hardware
Overview
The correct state of the device hardware is a requirement for the correct functioning of the device. The failure
or erroneous function of a hardware component leads to device malfunctions.
The following modules of the device hardware are monitored:
•
Base module
•
Expansion modules
•
Plug-in modules on the interface locations
The fault responses result, depending on type and degree of the error, as follows:
Hardware errors where the device remains in operation.
The error is indicated. The signals/data affected by the failure are marked as invalid. In this way, the affected
protection functions can switch into a secure state. Such errors are, for example:
•
Communication-module failure (module x)
•
Measuring-transducer module failure (module x)
•
USB interface
•
Integrated Ethernet interface
•
Real-time clock building block
•
A/D converter (fast current sum)
•
Battery voltage
•
Faulty or missing compensation values (magnitude/phase)
Failures which can partially be corrected by a restart of the device. The device goes briefly out of opera-
tion.
Such errors are, for example:
•
Memory error (RAM) in the base module
•
Faulty module
•
Module-connection error (PCB Link)
•
Control circuit error binary output
•
Outage of an internal auxiliary voltage
i
i
NOTE
If the error has not be rectified after 3 unsuccessful attempts, the system automatically recognizes it as a
severe device malfunction. The device goes permanently out of operation into a secure state (fallback
mode).
Fatal device errors with outage of central components: The device goes permanently out of operation
into a secure state (fallback mode).
Such errors are, for example:
•
Memory error (flash) in the base module
•
CPU/Controller/FPGA error in the base module
•
3 unsuccessful restarts in a row
You can find the detailed description, in table form, of the fault responses at the end of chapter 8. You will
find corresponding corrective measures there.
8.4
8.4.1
Supervision Functions
8.4 Supervision of the Device Hardware
SIPROTEC 5, High-Voltage Bay Controller, Manual 975
C53000-G5040-C015-9, Edition 11.2017