Hitachi EH-150 Series - Page 125

Chapter 6 Communication mode
6 - 83
Hi-Protocol
[EHV-CPU]
(2) Description of sample program
S parameter and sending data area are fulfilled at the first scan after power ON.
By setting R0 ON, TRNS 9 is executed and following initial setting shown in below table will be sent to port 2 of
EH-SIO module mounted on Unit 0 (basic unit) slot A.
(In this example, when initial setting of EH-SIO is completed, initial setting completion flag XA29 is set ON.
Once Hi-Protocol mode is configured, this mode will be kept after CPU is in STOP status. In this sample program,
initial setting program works only when initial setting has not been configured yet.)
Items
Setup value
Setup contents
Communication mode
H0020
Hi-Protocol mode
Type of task code
H0001
With station number
Station number
H27xx
Station number 27
TRNS 9 ( WYA5 , 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 = H0006 … No. of send data (byte)
WR101 = H0020 … Communication mode
WR102 = H0001 … Task code type
WR103 = H2700 … Station number
R7E3
Sending data area
(Parameter for initial
setting)
M0
S
TRNS 9 execution
R0
DIF
R7E3
XA29