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6.16. CTD(Count Down) Counter

6.16. CTD(Count Down):Counter​

 

Symbol

Relay combination

Factor

cnt: Designate the Counter Relay No.

pst: Set Preset value as relay or number

Description

Down-count the rise of Rung (deactivate to activated)

If the corresponding value of CL is 0, counter will be On(high) and not count anymore.

When Rung is activated, if the corresponding value of CL is negative number, the value of pst will be saved in CL.

Reference) Even if Rung is deactivated, CL will not be Cleared(-1).

Usage example

CTD(C2,100): Set C2 to Down-counter (100)

CTD(C3,RW3): Set C3 to Down-counter as the value of (RW3)