Справочник Пользователя для Mitsubishi Electronics FX
FX Series Programmable Controllers
Points Of Technique 10
10-23
4) Interlink Mode D8120 (b12, b11, b10) = (0, 1, 0)
10.14.4 8 bit or 16 bit communications.
This is toggled using the Auxiliary relay M8161. When this relay is OFF 16 bit communications
takes place. This actually means that both bytes of a 16 bit data device are used in both the
transmission and the receipt of messages. If the M8161 device is activated then 8 bit mode is
selected. In this mode only the lower 8 bits (or byte) is used to perform the transmission-
receiving actions. The toggling of the M8161 device should only occur when the RS instruction
is not active, i.e. it is OFF.
When a buffer area is specified in the RS instruction it is important to check whether 8 or 16bit
mode has been selected, i.e. a buffer area specified as D50 K3 would produce the followin g
results.......
takes place. This actually means that both bytes of a 16 bit data device are used in both the
transmission and the receipt of messages. If the M8161 device is activated then 8 bit mode is
selected. In this mode only the lower 8 bits (or byte) is used to perform the transmission-
receiving actions. The toggling of the M8161 device should only occur when the RS instruction
is not active, i.e. it is OFF.
When a buffer area is specified in the RS instruction it is important to check whether 8 or 16bit
mode has been selected, i.e. a buffer area specified as D50 K3 would produce the followin g
results.......
General note regarding hardware:
Information regarding pin outs of the respective ADP special function blocks can be found
along with wiring details in the appropriate hardware manuals.
along with wiring details in the appropriate hardware manuals.
16 bit mode - M8161 = OFF
8 bit mode - M8161 = ON
Data register
High byte
Low byte
Data register
High byte
Low byte
D50
X
F
D50
F
D51
0
D51
X
D52
0
FX
0(S)
FX
0N
FX FX
(2C)
FX
2N(C)
Reset using a program.
When it is not trurned off,the
next data cannot be received.
When it is not trurned off,the
next data cannot be received.
Data 2
RS
instruction
instruction
Send data
SD (TXD)
SD (TXD)
OFF ON
Data 4
OFF
ON
Send request
M8122
M8122
Receive
completion
M8123
completion
M8123
Data 4
Data 1
Data 3
Receive data
RD (RXD)
RD (RXD)
OFF
ON
*1
*1
*1
Data 3
*3
Time-out
evaluation time
D8129
evaluation time
D8129
×
10ms
OFF
ON
ON
ON
Reset using a program.
When it is not turned off, the next data cannot be received.
When it is not turned off, the next data cannot be received.
OFF
ON
DR(DSR)
Time-out
evaluation
flag M8129
evaluation
flag M8129
Up to 30 characfers
can be received *2
can be received *2
ER(DTR)