IAI MSEL - Page 84

Chapter 3 Operation
76
How to Use
1) Establish the display mode setting in port No. 338 and 339.
2) Set the digit to display (update) in port No. 332 and 333.
3) Establish the display pattern setting of the 7-segment display in port No. 340 to 346.
4) Have port No. 337 (Refresh) turned OFF → ON → OFF. (Update conducted with ON-edge)
To display other digits, repeat the steps 2) to 4).
After the SEL program for display is finished, the display lasts until Port No. 339 is turned OFF.
Reference Program : To show 1234
No E N Cnd Cmnd Operand 1 Operand 2 Pst Comment
1 LET 99 3
2 OUT 338 339
Display of User and
System by Turns
3 BTOF 337
4 * 1
st
digit data set
5 LET 99 0
6 OUT 332 333 Indicate 1
st
Digit
7 LET 99 3 3 = Display Data ‘1’
8 OUT 340 346 7-segment Pattern 1
9 BTON 337 Refresh ON
10 BTOF 337 Refresh OFF
11 * 2
nd
digit data set
12 LET 99 1
13 OUT 332 333 Indicate 2
nd
Digit
14 LET 99 118 118 = Display Data ‘2’
15 OUT 340 346 7-segment Pattern 2
16 BTON 337 Refresh ON
17 BTOF 337 Refresh OFF
18 * 3
rd
digit data set
19 LET 99 2
20 OUT 332 333 Indicate 3
rd
Digit
21 LET 99 103 118 03Display Data ‘3’
22 OUT 340 346 7-segment Pattern 3
23 BTON 337 Refresh ON
24 BTOF 337 Refresh OFF
25 * 4
th
digit data set
26 LET 99 3
27 OUT 332 333 Indicate 4
th
Digit
28 LET 99 75 75 = Display Data ‘4’
29 OUT 340 346 7-segment Pattern 4
30 BTON 337 Refresh ON
31 BTOF 337 Refresh OFF
32
33 EXIT