Siemens 'cyclic' timer.

Hi

I need to cycle a pump ON for 300s, OFF for 6000s on an S7-300 processor using ladder logic.

As there appears to be no dedicated timer for this, please could you advise on the best way to acheive this, many thanks.

Darren

You can use simple 'trick', the M 100.0 in example bit can be simply 'renamed' to any bit in your datablock or used directly to control pump output. There has to be s5t#5s exchanged for the value you want and also timers tm_1 and tm_2 created in symbol table.

Thanks Marius, very much appreciated.

Darren