434
Advanced I/O Instructions
Section 5-31
The hexadecimal key information that is input to IR 000 by HKY(––) is con-
verted to hexadecimal and stored in words DM1000 and DM1001.
IR 00015 is used as an “ENTER key,” and when IR 00015 turns ON, the num-
bers stored in DM 1000 and DM 1001 are transferred to DM 0000 and DM
0001.
5-31-4 TEN KEY INPUT – TKY(18)
Limitations
D
1
and D
1
+1 must be in the same data area.
DM 6143 to DM 6655 cannot be used for D
1
.
Description
When the execution condition is OFF, TKY(18) is not executed. When the exe-
cution condition is ON, TKY(18) inputs data from a ten-key keypad connected
to the input indicated by IW. The data is input in two ways:
1,2,3...
1.
An 8-digit shift register is created in D
1
and D
1
+1. When a key is pressed
on the ten-key keypad, the corresponding BCD digit is shifted into the least
significant digit of D
1
. The other digits of D
1
, D
1
+1 are shifted left and the
most significant digit of D
1
+1 is lost.
2.
The first ten bits of D
2
indicate key input. When one of the keys on the key-
pad (0 to 9) is being pressed, the corresponding bit of D
2
(00 to 09) is
turned ON.
Note
When one of the keypad keys is being pressed, input from the other keys is
disabled.
TKY(18) can be used in several locations in the program by changing the
input word, IW. Refer to page 434 for more details on TKY(18).
Flags
ER:
Indirectly addressed EM/DM word is non-existent.
(Content of
*
EM/
*
DM word is not BCD, or the EM/DM area boundary
has been exceeded.)
D
1
and D
1
+1 are not in the same data area.
D
1
:
First register word
IR, SR, AR, DM, EM, HR, TIM/CNT, LR
IW
:
Input word
IR, SR, AR, DM, EM, HR, TIM/CNT, LR
Ladder Symbols
Operand Data Areas
TKY(18)
IW
D
1
D
2
D
2
:
Key input word
IR, SR, AR, DM, EM, HR, TIM/CNT, LR
