LOGO! functions

4.4 Special functions list - SF

4.4.16Hours counter

Short description

A configured time is triggered with a signal at the monitoring input. The output is set when this time has expired.

Symbol in LOGO!

Wiring

Description

5

 

 

 

 

 

 

 

 

 

Input R

A positive edge (0 to 1 transition) at input R resets

 

 

 

 

K

 

 

 

output Q and sets a configured value MI at the

(Q

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

counter for the duration of the time-to-go (MN).

5DO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3DU

 

 

 

 

 

 

 

 

 

Input En

En is the monitoring input. LOGO! scans the on-time

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

of this input.

 

 

 

 

 

 

 

 

 

 

Input Ral

A positive edge at input Ral (Reset all) resets the

 

 

 

 

 

 

 

 

 

 

 

hours counter (OT) and the output, and sets the time-

 

 

 

 

 

 

 

 

 

 

 

to-go value (MN) to the maintenance interval MI:

 

 

 

 

 

 

 

 

 

 

 

• Output Q = 0

 

 

 

 

 

 

 

 

 

 

 

• Measured operating time OT = 0

 

 

 

 

 

 

 

 

 

 

 

• Time-to-go of the maintenance interval MN = MI.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Parameter

MI: Maintenance interval to be preset in units of hours

 

 

 

 

 

 

 

 

 

 

 

and minutes

 

 

 

 

 

 

 

 

 

 

 

Range of values:

 

 

 

 

 

 

 

 

 

 

 

0000...9999 h, 0...59 m

 

 

 

 

 

 

 

 

 

 

 

OT: The accumulated total operating time; you can

 

 

 

 

 

 

 

 

 

 

 

specify an offset in hours and minutes

 

 

 

 

 

 

 

 

 

 

 

Range of values:

 

 

 

 

 

 

 

 

 

 

 

00000...99999 h, 0...59 m

 

 

 

 

 

 

 

 

 

 

 

Q → 0:

 

 

 

 

 

 

 

 

 

 

 

• When "R" is selected:

 

 

 

 

 

 

 

 

 

 

 

Q = 1, if MN = 0;

 

 

 

 

 

 

 

 

 

 

 

Q = 0, if R = 1 or Ral = 1

 

 

 

 

 

 

 

 

 

 

 

• When "R+En" is selected:

 

 

 

 

 

 

 

 

 

 

 

Q = 1, if MN = 0;

 

 

 

 

 

 

 

 

 

 

 

Q = 0, if R = 1 or Ral = 1 or En = 0.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output Q

The output is set when the time-to-go MN = 0 (see

 

 

 

 

 

 

 

 

 

 

 

timing diagram).

 

 

 

 

 

 

 

 

 

 

 

The output is reset:

 

 

 

 

 

 

 

 

 

 

 

• When "Q→0:R+En", if

 

 

 

 

 

 

 

 

 

 

 

R = 1 or Ral = 1 or En = 0

 

 

 

 

 

 

 

 

 

 

 

• When "Q→0:R", if R = 1 or Ral = 1.

 

 

 

 

 

 

 

 

 

 

 

 

MI = Configured time interval

MN = Time-to-go

OT = Total time expired since the last hi signal at input Ral

These values are always retentive!

LOGO!

 

Manual, 04/2011, A5E03556174-01

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Siemens 6ED1050-1AA00-0BE8 manual Hours counter, Short description
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