What is the speed (RPM) and how many pulses per revolution your tachometer is going to generate?
What is the maximum Unit-Count per second?
What is the maximum cycles per second of manufacturing line?
If any of the previous frequencies is less than 100Hz, you can use regular Tri-PLC inputs triggering regular internal PLC counters and timers.
If any of the previous frequencies is greater than 100Hz but less than 10Khz, you can use both Tri-PLC High Speed Counter inputs to automatically monitor count and Frequency/Speed. Of Course, you can always use the two High Speed Counters if frequency is less than 100Hz. Keep in mind that there are only two High Speed Counters available on a Tri-PLC.
Collecting and displaying this data real time is not a problem. Storing the data in the PLC depends on the different type of data and how often you store these data. There are approximatly 4000 16-bits DM[] registers available for storage in PLC. If you are doing only end-of-day data storage, the PLC internal DM[] registers can handle that. If you have to do massive data storage, you can connect the PLC to a PC. The PC could store the data in hard drive or cd so now you have a unlimited amount of storage space.
If you need technical help designing your PLC based system, please let me know. I am a PLC Systems Integrator already helping many Inventors currently using Tri-PLC's.
Sincerely;
Albert Martinez
PLC Systems Integrator
martinezalbert@netzero.com
