Hitachi EH-150 Series - Page 60

Chapter6 Communication Mode
6 - 18
Fre
e Protocol
 Sample program [ Initial setting + Data receiving ]
(1) Ladder program
[EH-CPU]
1
<=
WX212
WR7 = H0000 … Initial setting command
WR8 = 200 … Command timeout time
WR9 = H000A I/O address of sending data area
WRA = H0100 ( WR100 )
WRB = H000A I/O address of receiving data area
WRC = H0200 ( WR200 )
WRD = H0400 … Size of receiving data area
TRNS 9 ( WY214 , WR0 , M0 )
R7E3
Data receive command set
TRNS 9 command start
TRNS 9 command
WR100 = H000E … No. of send data (byte)
WR101 = H0000 … Communication mode
WR102 = H0100 … Message composition, etc.
WR103 = H0000 … Start character
WR104 = H0DFF … Stop character
WR105 = H0000 … Check code calculation type
WR106 = 200 … Receiving timeout time
WR107 = H0000 … Data interval time
R7E3
R7E3
M0
S
DIF0
s parameter
Sending data area
(parameter for initial
setting)
Data receive command set
TRNS 9 command start
WR7 = H0010 … Data receive command
M0 = 1
DIF1
X2113
For initial setting