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Generic supervision tasks
Mismatch between ROM and RAM data (ROM/RAM error)
10.2.1
CPU verifies ROM and RAM every two minutes. When an error is found, the message is
displayed by the supervision function.
Error level
(i)
The error level has been set at level 1 (Serious error) in the automatic supervision. Checking
error on RAM and ROM will be carried out periodically. If the error is detected, the IED
automatically restarts the operation. The supervision function runs at CPU module
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 10.2-1 Error messages provided by the supervisor in CHK_ROMRAM
Message and level
CP*_ (ROM/RAM) error
Error level
Display
area
Top
00000001: Read error in ROM
00000002: Mismatch between ROM and RAM
row
Middle
RAM address
row
Bottom
RAM value
row
(→p. 645)
Mismatch between the RAM and ROM detected on the following
module instructed with "CP*_" as follows:
CP1M:
Serious error (Level 1)
Table 10.2-2 Detailed information in CHK_ROMRAM
Meaning of the detailed information
Left column
Technical description: Signal processing and
.
Meaning of the information
CPU module
ROM address
ROM value
(No information displayed)
- 802 -
6F2T0207 (0.01)
.
1
Right column
GRE200 (5,6)
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