my boss wants me to make a program for pulse counting on a siemens logo PLC. im a trainee at ths company and i never worked with a logo before. i looked around in help and google but my guess is that i think to hard for this
plc
the job is this:
with a thumbeel-switch(hope i translated that wright) connected to the digital inputs of the logo and a pulsing fotocel i must make an ouput high for example: when i say with the switch that the output must get high on the positive flank of the third pulse from the fotocel the output must be high as long as that third pulse is high no more pulse no output signal.
i think that i must make this with a shiftregister but i have no idea how i must do this
please help me
regards walters
plc
the job is this:
with a thumbeel-switch(hope i translated that wright) connected to the digital inputs of the logo and a pulsing fotocel i must make an ouput high for example: when i say with the switch that the output must get high on the positive flank of the third pulse from the fotocel the output must be high as long as that third pulse is high no more pulse no output signal.
i think that i must make this with a shiftregister but i have no idea how i must do this
please help me
regards walters