Timers And Counters In Plc

Plc timers from the standard.

Timers and counters in plc.

Timers can be used not only in ladder logic but also as functions blocks in function block diagram or functions in structured text they can even be used to check how long an actuator has been running and then for alarms in a scada system. Hi timers are important part of plc without which it is very difficult to think of executing a process. With all that said timers are very useful and it is crucial for every plc programmer to know the basics of counting in a plc program. System hardware video installing the software video establish communication video numbering system and addressing video the programming software and manuals can be downloaded from the automation direct website free of charge.

Continuing our series we will now look at timers and counters and how they are used in the click plc. Plc counters are also used to assist logging to scada systems by counting the amount of times these events has happened or setting alarms when an event has happened a certain amount of times. Timers are blocks that count the time as specified by the user and the executes the algorithm based on the time.