Mitsubishi Electronics 13JW55 ユーザーズマニュアル

 

 

App. - 46

 

 

 
Appendix 4.28    Program using digital switch to import data 

When a set value of the digital switch is always input and stored to D10 of the 

programmable controller 

 

1

2

3

4

Digital switch

Input module

CPU

X20

X2F

Data 
register
D10

to

Converted into BIN

BIN

K4X20

D10

SM400 (always ON)

Wrong 
configuration

 

 

In the above program, changing a value of the digital switch while the programmable 

controller is in RUN may cause codes other than 0 to 9 depending on the timing of 

the change, which may cause an operation error of the CPU. 

To avoid this, write a program as follows. 

 

(Example 1)  For 4 digits of X20 to X2F 

SM400

0

K1X20

K0

<=

K1M20

K1X20

MOV

K1M24

K1X24

MOV

K1M28

K1X28

MOV

K1M32

K1X2C

MOV

D10

K4M20

BIN

K1X24

K0

K1X28

K0

K1X2C

K0

K1X20

K9

>=

K1X24

K1X28

K1X2C

<=

<=

<=

K9

K9

K9

>=

>=

>=

 

 

(Example 2)  For 8 digits of X20 to X3F 

SM400

0

Z0

RST

K8

FOR

K1M100Z

K1X20Z

MOV

Z0

K4

+

NEXT

K1X20Z0

K0

K1X20Z0

<=

K9

>=

4

7

31

32

D10

K8M100

DBIN

K8Y40

D10

DBCD

SM400