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Function
18
iso1685FR(M)_D00002_02_M_XXEN/06.2017
3.5 Self test
3.5.1 Self test after connection to the supply voltage
Once connected to the supply voltage, all internal measurement functions as well as the process control com-
ponents, such as data and parameter memory, are checked.
•
All internal measuring functions
•
Flash memory
•
RAM memory
•
Parameter memory
•
CPU clock (Oscillator)
•
CPU register
•
External watchdog
•
All internal watchdogs
Once the self test is finished, after approx. 3 s the normal measurement mode begins.
If a device error is detected, the corresponding alarm will be signalled via the BMS bus as well as via the alarm
relay K3 (31-32-34). This relay continuously operates in N/C mode, i.e. it de-energises even in case of a complete
device failure.During this self test, which occurs during device start up, the alarm relays K1 and K2 are not swit-
ched.
3.5.2 Continuous self test during operation
The following tests are continuously carried out in the background:
•
Stack
•
CPU clock (Oscillator)
•
CPU register
•
Monitoring of the supply voltage
U
s
•
Temperature monitoring (of?) coupling
•
Measuring voltage generator
•
Data, parameter and Flash memories
•
RAM memory
Содержание ISOMETER iso1685FR
Страница 6: ...6 ...
Страница 10: ...Important information 10 iso1685FR M _D00002_02_M_XXEN 06 2017 ...
Страница 14: ...Safety instructions 14 iso1685FR M _D00002_02_M_XXEN 06 2017 ...
Страница 42: ...Diagram for the calculation of Ze 42 iso1685FR M _D00002_02_M_XXEN 06 2017 ...
Страница 44: ...Information about the measuring method 44 iso1685FR M _D00002_02_M_XXEN 06 2017 ...
Страница 50: ...INDEX 50 iso1685FR M _D00002_02_M_XXEN 06 2017 ...
Страница 51: ...INDEX 51 iso1685FR M _D00002_02_M_XXEN 06 2017 ...