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Chapter6 Communication Mode
[EHV-CPU]
R7E3
R7E3
R7E3
DIF
R100 X4A29
(2) Sample program description
The s parameter and the sending data area parameter are set upon the first scan.
M0 will be turned on at the 2nd scan, and initial setting for port 2 of slot A, unit 4 will be performed.
When R100 is turned on, then data "H4C4F4E" will be sent to a connected device. Reply data will be stored in
WR200. Bit X4A29 is a status flag of EH-SIO. When initial setting is completed, this flag will be ON.
Items
Communication mode
Message composition
Control of modem line
Data conversion type
Start character
Stop character
Check code calculation type
Receiving timeout interval
Data interval time
...
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 = H0400
Size of receiving data area
...
WR100 = H000E
No. of send data (byte)
...
WR101 = H0000
Communication mode
...
WR102 = H0000
Message composition, other
...
WR103 = H0000
Start character
...
WR104 = H0000
Stop character
...
WR105 = H0000
Check code convention type
...
WR106 = 100
Receiving timeout time
...
WR107 = 10
Data interval time
TRNS 9 ( WY4A5 , WR0 , M0 )
R100 = 0
WR100 = H0003
WR101 = H4C4F
Send data
WR102 = H4E00
...
WR7 = H0021
Receive after sending command
M0 = 1
Setup value
H0000
Free protocol mode
H00xx
Only data
Hxx0x
RS and ER regular ON
Hxxx0
Through type
H0000
Not used
H0000
Not used
H0000
Not used
100
1000 ms
10
Detect end of data according to 100ms interval
6 - 26
s parameter
Sending data area
(Parameter for initial
setting)
TRNS 9
command
M0
S
For initial setting
Sending data, command set
TRNS 9
command start
Setup contents
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