Bug #321
FEP的modbusTcpS转发协议AI点值等于老值时无效，任然显示上次值
Start date:
11/12/2019
Due date:
% Done:
0%
Estimated time:
Defect version:
Description
SendMeasure
加更新老值+清变化标志
ycinfo->OldVal=ycinfo->Val;///**Modified by WYF20191112 增加更新老值+清变化标志**/
UNSETBIT;//FEP
SendDiOne
先移动再取反
buf[byteIdx] &= (~(1<<bitIdx)) & 0xff;