PLC (input/output the time lag PLC system response time) Introduction to the

Input/output time lag is also called the system response time, is refers to the PLC controller input signal of change in the moment to the external output signal changes related to its control moment of the time interval between, it is composed of input filter circuit, the output circuit of the lag time and because of the way of scanning and the time lag of the three parts. Input module of the RC filter circuit is used to filter out interference introduced by the input noise, to eliminate contact due to external input actions cause the jitter caused by the adverse effects, the filter circuit time constant determines the length of the input filter, its typical values for about 10 ms. Output module of the lag time is associated with the type of module, relay output circuit of lag time usually at about 10 ms; Bidirectional thyristor output circuit when the load current of the time lag of about 1 ms, the load from electricity to power the maximum delay time of 10 ms; General type transistor output circuit of the time lag under 1 ms. Caused by way of scanning and the time lag of up to more than two scan cycle. PLC controller overall response delay time in only a few tens of ms, for general system is irrelevant. Request the time lag between input and output signals short system as far as possible, can choose to scan speed PLC controller or take other measures.
The global market was valued at programmable control systems in plc controller price and is expected to reach a market value of programmable control systems by plc controller price, with a CAGR of programmable control systems during the forecast period.
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