V01004
Start
Read status word from
r
egister 3x0001
Is disturbance bit
(
bit 4) set?
Select next oldest non-
e
xtracted record by writing
0x04 to register 4x00400
Send command to accept
r
ecord by writing 0x08 to
register 4x00400
Extract disturbance data
Yes
No
Error
Figure 51: Automatic selection of disturbance record - method 1
Method 2
Method 2 is more complex to implement but is more efficient at extracting large quantities of disturbance
records. This may be useful when the disturbance recorder is polled only occasionally and therefore may
have many stored records.
Chapter 7 - SCADA Communications MiCOM P747
216 P747-TM-EN-1
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