START
115200, baud rate, from 1200,2400 ~ 57600,115200
N, N=No Parity, E=EVEN, O=ODD
1, 1=one STOP bit, 2=two STOP bits
100, TimeOut for Modbus command, format=Dec, valid=[0 ~ 255], unit=0.01 sec, 0.01x100=1 sec, max=2.55 sec
0, delay in the end of Modbus command, format=Dec, valid=[0 ~ 255], unit=0.01 sec, max=2.55 sec
0, InTxPdoMax/2, format=Dec, valid=[0 ~ 128], default=0=Auto
0, OutRxPdoMax/2, format=Dec, valid=[0 ~ 128], default=0=Auto
0 0 0 0 0 0 0, 7 Reserved, format=Hex, default=0
8, eight commands(00-07), max=300, format=Dec
02 06 00 00 01 23, 02, 00, 01, D/A_0=OutRxPdo[02]+initial=0x0123, (00)
02 06 00 01 02 34, 03, 00, 01, D/A_1=OutRxPdo[03]+initial=0x0234, (01)
02 06 00 02 03 45, 04, 00, 01, D/A_2=OutRxPdo[04]+initial=0x0325, (02)
02 06 00 03 04 56, 05, 00, 01, D/A_3=OutRxPdo[05]+initial=0x0456, (03)
02 03 00 40 00 01, 02, 00, 00, InTxPdo[02]=D/A_0 read back, update cyclically, (04)
02 03 00 41 00 01, 03, 00, 00, InTxPdo[03]=D/A_1 read back, update cyclically, (05)
02 03 00 42 00 01, 04, 00, 00, InTxPdo[04]=D/A_2 read back, update cyclically, (06)
02 03 00 43 00 01, 05, 00, 00, InTxPdo[05]=D/A_3 read back, update cyclically, (07)
STOP
==========================================================================
OutRxPdo[00]=2610CTL0, OutRxPdo[01]=2610CTL1, OutRxPdo[02..FF]=Out[02..FF] 
InTxPdo[00]=2610SYS0,  InTxPdo[01]=2610SYS1,  InTxPdo[02..FF]=In[02..FF] 
==========================================================================
if (OutRxPdo[0].bit0=0) then D/A=initial value
if (OutRxPdo[0].bit0=1) DA_0/1/2/3=OutRxPdo[02/03/04/05]