PMX Event Counter (Trigger)

In this example, the overpassing of a force value should be counted and displayed. Once the count 5 is reached, this should be signaled on a digital output. Then the operator can set the count back to 0 again.

The following example shows how to setup an event counter in PMX. Two Calculated Channels are required therefore.

Procedure

Setup a Calculated Channel „Trigger Pulse“.

The measured force value is the input signal
A predefined value can be set as limit
A condition is selected „Trigger on going above“
The output is given to „Flag01“

Setup a Calculated Channel „Counter“.

Flag01 is the input signal
Counted is only with a positive edge
By setting a specific limit value for the flag a signal can be initiated, which will be set active when the limit value is reached
This activates Flag02, as soon as the counter reaches a value of 5 or higher
These Flags can be retrieved by the PLC via a fieldbus

If the result, means archiving of a counter value should be signalized at a digital output(PX878), this flag is set as input for a digital output. In this example digital output 2 is activated by flag02.

The page below is reached by following the path: Menu/Settings/Digital Outputs

Reseting the event counter can be done by:

Digital input (PX878)
By a fieldbus-control word, this is indicated by digital inputs 17..32 of the PMX
Other flags of different Calculated Channels.

Disclaimer

These examples are simply for the purpose of illustration. They cannot be used as the basis for any warranty or liability claims.