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Supervision of RAM (RAM error)
10.2.3
For the RAM circuit, reading and writing operation are verified at any time. When an error is
found, the error message will be displayed by the automatic supervision function.
Error level
(i)
The error level has been set at level 1 (Serious error) in the automatic supervision. Checking
is carried out at any time. If an error is detected, the IED automatically restarts the operation.
The supervision function runs at the CPU module
when the error is solved.
Note: It is discussed in Chapter
1
communication module
Error message
(ii)
When detecting an error, the error message will be shown on the LCD screen. LED will be lit
up.
Table 10.2-5 Error messages provided by the supervisor in CHK_RAM
Message and level
CP*_(RAM) error
Error level
Table 10.2-6 Detailed information in Hexadecimal in CHK_RAM
Display
area
Top
row
Middle
row
Bottom
(No information displayed)
row
Technical description: Signal processing and
(→p. 645)
Error detection in the RAM located on the following module
instructed with "CP*_" as follows:
CP1M:
Serious error (Level 1)
Meaning of the detailed information
Left column
Read value
Error address
- 804 -
. The error message will be cleared promptly
1
.
Meaning of the information
CPU module
Right column
Write value
(No information displayed)
(No information displayed)
6F2T0207 (0.01)
GRE200 (5,6)
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