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

 

 

App. - 20

 

 

 
Appendix 4.13  Retentive timer 

The input X2 switches between on and off continuously. The on-time of X2 is 

accumulated and Y72 turns on according to this accumulated value n. 

 

(1)  For a ladder that accumulates a value without a retentive timer 

 

Project name 

QA-21 

Program name 

MAIN 

 

M0

X2

M0

0

2

T195

D7

MOV

D7

T195

MOV

Clears D7 by time-out

Timer starts when 

X2 is turned on

M1

PLS

T195

K600

M1

9

M0

12

T195

15

Y72

D7

K0

MOV

Saves current value 

of timer to D7

Writes D7 to timer 

when X2 is turned on

Y72 turns on by time-out

 

 

(2)  When retentive timers are assigned in the device setting of the PLC parameter 

Retentive timer (ST): 224 points (ST0 to ST223) 

 

Project name 

QA-8 

Program name 

MAIN 

 

ST195

X2

X1

0

7

Timer starts when 
X2 is turned on

ST195

RST

Can be cleared by 
turning on X1

Cannot be cleared 
by turning off

Y72

ST195

5

K600