Hello colleagues.

If you can help me, I need to measure the linear meters of the material that passes through a nip, the data I have is m / min and RPM, and how can I do it?

// timeCycle: Lreal; // [s] Duration of last PLC cycle
// readSpeed: Lreal; // [m/min] Speed reading
// oldSpeed: Lreal; // [m/min] Speed reading from previous cycle
// distNow: Lreal; // Approximate displacement traveled in last PLC cycle
// distAcc: Lreal; // Accumulated displacement

// Approximate accumulated displacement
#distNow :=
(#timeCycle / LREAL#60.0) *
((readSpeed + oldSpeed) / LREAL#2.0);

#oldSpeed := #readSpeed;
distAcc := distAcc + distNow;

 ~

qwazee

Encoder feedback would be most accurate.
An approximation may be coded as:

// timeCycle: Lreal; // [s] Duration of last PLC cycle
// readSpeed: Lreal; // [m/min] Speed reading
// oldSpeed: Lreal; // [m/min] Speed reading from previous cycle
// distNow: Lreal; // Approximate displacement traveled in last PLC cycle
// distAcc: Lreal; // Accumulated displacement

// Approximate accumulated displacement
#distNow :=
(#timeCycle / LREAL#60.0) *
((readSpeed + oldSpeed) / LREAL#2.0);

#oldSpeed := #readSpeed;
distAcc := distAcc + distNow;

 ~

why div with 2.0?

(readSpeed + oldSpeed) / LREAL#2.0

Mister T

Hello,

use physical formula:

DeltaDistance = Velocity * DeltaTime

Encoder feedback would be most accurate.
An approximation may be coded as:

// timeCycle: Lreal; // [s] Duration of last PLC cycle
// readSpeed: Lreal; // [m/min] Speed reading
// oldSpeed: Lreal; // [m/min] Speed reading from previous cycle
// distNow: Lreal; // Approximate displacement traveled in last PLC cycle
// distAcc: Lreal; // Accumulated displacement

// Approximate accumulated displacement
#distNow :=
(#timeCycle / LREAL#60.0) *
((readSpeed + oldSpeed) / LREAL#2.0);

#oldSpeed := #readSpeed;
distAcc := distAcc + distNow;

~

why div with 2.0?

(readSpeed + oldSpeed) /LREAL#2.0

S5-95 Progrsmming Cable

why div with 2.0?

(readSpeed + oldSpeed) /LREAL#2.0

 It is to calculate the average between two moment speeds. You can decide to use only readSpeed and avoid the oldSpeed and divide by two.

The concept originates from calculating an area under a curve using small 'slices'. This is the base theory for math integration.