Toshiba GR 200 Series, Instruction Manual

Page: 1107 / 1563

6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)
- 1086 -
10.2.13
Supervision of A/D accuracy on VCT#1 (AI#1 ACC error)
It is possible to detect the failure of the analog to digital conversion in the VCT module†.
†Note: For more information about the VCT, see Chapter
Technical description:
Transformer module for AC analog input module.
(i)
Error level
Generally, the default error level has been set at level 1 (
Serious error 1
). For example, the user
can program the level using setting [
CHK_ACC1:LVl
] when the VCT module at the VCT#1
2
slot should be supervised; then, set
On
for the setting [
CHK_ACC1:Sw
]. The manufacture set
one (1) second to detect the failure; it is reset in a second when the failure is cleared.
1
Note: The entire operation of the IED is stopped forcibly when the error is detected.
2
Note: The location of the VCT is discussed in Alpha-numerical references. See chapter
Technical description: IED case and module slot.
(ii)
Error message
When the function operates and detects error, an error message can be shown at the LED and
the LCD screen.
Table 10.2-27 Error messages provided by the supervisor in CHK_ACC
Message and level Meaning of the information
AI#1(ACC) error Detection of the conversion deterioration at VC1 slot
Error level Serious error (Level 1)
Table 10.2-28 Detailed information in Hexadecimal in CHK_ACC
Display
area
Meaning of the detailed information
Left column Right column
Top
row
00000001: P error
00000002: N error
00000004: Neg error
00000010: P(H) error
00000020: N(H) error
00000040: Neg(H) error
Plus value / Minus value
Middle
row
Plus rev value / (none) Plus value / Minus value
Bottom
row
Plus rev value (No message displayed)