Toshiba GR200 Series - 10.2.2 Supervision of check-sum error (SUM error); (i) Error level; (ii) Error message

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 1237 -
10.2.2 Supervision of check-sum error (SUM error)
The check sum in the memory on the CPU module is verified every four minutes; when the
error is found the error message is displayed by the supervision function.
(i) Error level
The error level has been set at level 1 (Serious error) for the supervision, the check-sum error
on the memory is carried out periodically. If the error is detected, the IED restarts its operation
automatically. The supervision function runs on the CPU module
1
. Clearing the error message
is made promptly when the error is cleared.
1
Note: The CPU module is discussed in Chapter Technical description: Signal processing
and communication module: Processing module.
(ii) Error message
When detecting an error, an error message can be shown on the LCD screen and an LED is lit.
Table 10.2-5 Error messages provided by the supervisor in CHK_SUM
Message and level
Meaning of the information
CP*_ (SUM) error
Sum error in the memory detected on the following module:
CP1M: CPU module
Error level
Serious error (Level 1)
Table 10.2-6 Detailed information in Hexadecimal in CHK_SUM
Display
area
Meaning of the detailed information
Left column
Right column
Top
row
00000001: Read error in ROM
00000002: Sum incorrect in ROM RAM
Sum value calculated
Middle
row
Sum value pre-programmed
Address information that read error occurs
in the ROM
Bottom
row
(No information displayed)
(No information displayed)