LS Industrial Systems GIPAM - Page 77

21
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The data frame that GMPC has received is discarded when there is ECC error on it .
The data frame that GMPC has received is recognized as abnormal response (E bit =
1) when there is an error in value on it.
There are two different types of synchronization which are ROUGH SYNC and
PRECISION SYNC.
9.4.1 ROUGH SYNC
- START_ROUGH_SYNC
PC → GMPC-III
0xFF + 0x00 + 0x?? + 0x27 + 0x00 + year + mon + day +
hour + min + sec + ECC
[DATA-0]
[DATA-1]
[DATA-2]
[DATA-3]
[DATA-4]
[DATA-5]
[DATA-6]
0x00
year
mon
day
hour
min
sec
START_ROUGH_SYNC
Inputting the last two digits of year as binary
Inputting the value of month as binary
Inputting the value of date as binary
Inputting the value of hour as binary
Inputting the value of minute as binary
Inputting the value of second as binary
- END_ROUGH_SYNC
PC ← GMPC-III 0xFF + 0x00 + 0x?? + 0x21 + 0x00 + ECC
[DATA-0] 0x00 END_ROUGH_SYNC
- ERROR
PC ← GMPC-III 0xFF + 0x00 + 0x?? + 0XA0 + ECC
Host System
GMPC-III
START
_
ROUGH
_
SYNC
END_ROUGH_SYNC
/ ERROR