6F3B0253
Basic Hardware and Function 239
7. Instructions
FUN 235 I/O Direct I/O
Expression
Input −[ I/O (n) A ]− Output
Function
When the input is ON, this instruction immediately updates the external input (XW) and output
(YW) registers which are in the range of n registers starting with A.
• For XW register ... reads the data from corresponding input circuit
• For YW register ... writes the data into corresponding output circuit
Execution condition
Input Operation Output
OFF No execution OFF
ON Execution ON
Operand
Name Device Register Constant Index
X Y R S T. C. XWYWRWSW T C D I J K
nRegister size 1 - 32
AStart of
registers √√
Example
When R010 is ON, the 4 registers starting with XW00 (XW00 to YW03) are updated
immediately.
XW00 Input
XW01 circuit
YW02 Output
YW03 circuit