Toshiba GR200 Series Instruction Manual page 482
Centralized busbar protection ied
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Mismatch between ROM and RAM data (ROM/RAM error)
9.2.1
The ROM and RAM on the CPU module are verified every two minutes; when the error is
found, an error message is displayed by the supervision function.
Error level
(i)
The error level has been set at level 1 (Serious error) for the supervision, checking error on
the RAM and the ROM is carried out periodically. If the error is detected, the IED restarts its
operation automatically. The supervision function runs on the CPU module
Note: The CPU module is discussed in Chapter
1
and communication module: Processing module.
Error message
(ii)
When detecting an error, an error message can be shown on the LCD screen and an LED is lit.
Table 9.2-2 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
Mismatch between the RAM and ROM detected on the following
module instructed with "CP*_" as follows:
CP1M:
Serious error (Level 1)
Table 9.2-3 Detailed information in CHK_ROMRAM
Meaning of the detailed information
Left column
- 468 -
Technical description: Signal processing
Meaning of the information
CPU module
ROM address
ROM value
(No information displayed)
6F2S1931 (0.20)
.
1
Right column
Centralized GRB200
(Soft: 030, 031, 032, 033, 034)
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