gefran VDI100 User Manual

CRC calculate program (C language):
UWORD ch_sum (UBYTE long, UBYTE *rxdbuff )
{
BYTE i = 0;
UWORD wkg = 0xFFFF;
while ( long-- ) {
wkg ^= rxdbuff++;
for ( i = 0 ; i < 8; i++ ) {
if ( wkg & 0x0001 ) {
wkg = ( wkg >> 1 ) ^ 0xa001;
}
else {
wkg = wkg >> 1;
}
}
}
return( wkg );
}
Error code
ASCII Mode RTU Mode
STX ‘:’ Node Address 02H
Address
‘0’ Function 83H
‘1’ Exception code 52H
Function
‘8’
CRC-16
High C0H
‘6’ Low CDH
Exception code
‘5’
‘1’
LRC Check
‘2’
‘8’
END
‘CR’
‘LF’
During a communication error the drive will response with an Exception Code and send a message back to the
main system consisting of a Function Code that is “ANDED (and 80h)” with 80 Hex.
Exception code Content
01 Function code error
02 Register number error
03 DATA setting error
04 Register number is over 32
VDI100 • Instruction manual 7

gefran VDI100 Specifications

General

Brand	gefran
Model	VDI100
Category	Motherboard
Language	English