FX series timers for a maximum time of 3 276.7s, if you need more time, you can use the circuit shown in Figure 1. When OFF is X2, T0, and C0 is in reset State, they do not work. X2 for ON Shi, its often open touch points connected, T0 began timing, 3000s Hou 100ms timer T0 of timing time to, its current value is equal to set value, it of often closed touch points disconnect, makes it himself reset, reset Hou T0 of current value into 0, while it of often closed touch points connected, makes it himself of coil again “power”, and began timing. T0 to work in cycles, until the X2 is OFF, it can be seen from the above analysis, the top row of the circuit in Figure 1 is a pulse generator, pulse period is equal to the set value of T0.
Count of pulse train to C0, expiration of 30,000 numbers (that is, 25000h), the current value is equal to the set value of C0, its normal open contacts close. T0 and C0 set value of KC and KT, respectively, for 100ms timer, the total time for
T=0.1KTKc (s)
With special auxiliary relay contacts to counter provides periodic 1min of the M8014 of the clock pulse, for a maximum time of a single timer 32 767min.
PLC ONE 