Toshiba GR200 Series Instruction Manual page 1330

Line differential protection ied

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Communication failure (Com fail)

The transmission between two IEDs is also monitored. If the error is detected for ten seconds,

the communication failure is issued.

Generally, the default error level is set at level 2 (Serious error (Comm)), but the user can

program the level using settings [CHK_CM_FAIL1:Lvl] and [CHK_CM_FAIL2:Lvl]; then, set On

for the setting [CHK_CM_FAIL1:Sw] and [CHK_CM_FAIL2:Sw]. The manufacture sets ten (10)

seconds to detect the failure; it is reset in 12 ssp (i.e., 12×48×Power_system_frequency (Hz))

when the failure is cleared.

Error message

When the function operates and detects error, an error message can be shown at the LED and

the LCD screen.

Table 10.5-9 Error messages provided by the supervisor in CHK_CM_FAIL

Message and level

†Note: Level 2 is set as default, but the user can change the error level above using the

settings [CHK_CM_FAIL*:Lvl].

Table 10.5-10 Detailed information in CHK_CM_FAIL

Meaning of the information

Detection of an error located at X†

Serious error (Level 2) †

Meaning of the detailed information

(No information is displayed)

6F2S1914 (0.49)

GRL200 (Soft 033 & 037)

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