Hitachi EH-150 Series - Page 100

Chapter 6 Communication Mode
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Modbus Slave
 Sample program [ Initial setting ]
(1) Ladder program ( Not used I/O mapping function )
[EH-CPU]
[EHV-CPU]
TRNS 9 ( WY4A5 , WR0 , M0 )
WR7 = H0000 … Initial setting command
WR8 = 200 … Command timeout time
DR9 =ADR(WR100) … I/O address of sending data area
( WR100 )
DRB = ADR(WR200) … I/O address of receiving data area
( WR200 )
WRD = H0002 … Size of receiving data area
R7E3
s parameter
TRNS 9 command
WR100 = H000A … No. of send data (byte)
WR101 = H0011 … Communication mode
WR102 = H0000 … Modbus mode (RTU)
WR103 = H0114 … Address & Waiting time
WR104 = H0000 … I/O mapping (B) (Not used)
WR105 = H0000 … I/O mapping (W) (Not used)
R7E3
Sending data area
(Parameter for
initialization )
M0
S
TRNS 9 command
execution
R0
DIF
R7E3
X4A29
TRNS 9 ( WY4A5 , WR0 , M0 )
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 = H0002 Size of receiving data area
WR100 = H000A No. of send data (byte)
WR101 = H0011 Communication mode
WR102 = H0000 Modbus mode (RTU)
WR103 = H0114 Address & waiting time
WR104 = H0000 I/O mapping (B) (Not used)
WR105 = H0000 I/O mapping (W) (Not used)
S
R0
DIF1
R7E3
R7E3
M0
R7E3
s parameter
Sending data area
(Parameter for
initialization)
TRNS 9 command
TRNS 9 Execution
X4A29