Reset Watch Dog Timer WDT, WDTP

Owned by CIMON (Unlicensed)
Jul 06, 2023
2 min read

Reset Watch Dog Timer: WDT, WDTP

 

Instruction

Device address

No. of Steps

Flag

M

X

Y

K

L

F

T

C

S

Z

D

@D

Int.

Error

Zero

Carry

WDT(P)

-

-

-

-

-

-

-

-

-

-

-

-

-

1

-

-

-

 

 

 

WDT

Resets Watch Dog Timer in a sequence program.

Used when the time from Step 0 to END(PEND) is over the set value of Watch Dog Timer according to conditions in a sequence program.

When Scan Timer exceeds every set value of the Scan Watch Dog Timer, the set value of Watch Dog Timer should be changed in PLC Parameter.

Must ensure that neither T1 (0 Step to WDT) nor T2 (WDT to END(PEND) exceeds the set value of Watch Dog Timer.

 

 

Though the WDT command can be used over twice for one scan, ensure not to take too long to reset the output in case of an error.

 

Conditions)

The conditions to reset WDT are as follows:

 

 

Example)

The set value of Watch Dog Timer is 150 ms.

It takes 300 ms from 0 Step to END(PEND).