Description
IC800SS1228RD2 Time Delay Detection
IC800SS1228RD2 for the contactor action conditions, Y0 for the control coil output, X1 for the lead back to the PLC input contactor auxiliary normally open contacts, timer timing time is greater than the contactor action time. r0 for the set fault bit, R0 for the ON that there is a fault, to do the alarm processing; R0 for the OFF that there is no fault. Fault has memory function, cleared by the fault reset button.
IC800SS1228RD2 open or close the electric valve, according to the valve open, close time is different, set the delay time, after the delay detection open in place or close in place signal, if these signals can not be accurately returned to the PLC on time, indicating that the valve may be faulty, to do the valve fault alarm processing. x2 for the valve open conditions, Y1 for the control valve action output, timer timing time is greater than valve Open in place time, X3 for the valve in place to return to the signal, R1 for the valve fault bit.
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