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The maximum operating frequency of the counter in the PLC ladder program is limited by the scan period and is generally only a few tens of Hz. In industrial control, the PLC is sometimes required to have a fast counting function, and the counting pulse may come from a rotary encoder, a mechanical switch or […]

(1) When restarting, it will trip at a raise speed. This is a very serious phenomenon of overcurrent. The main reasons are: load short circuit, mechanical parts stuck; inverter module damage; motor torque is too small and so on. (2) Power-on jump, this phenomenon can not be reset generally, the main reasons are: bad module, […]

What kinds of sensors are classified by output parameters? (1) Resistive type This type of sensor is a change that will be measured by a sensitive component to a resistance. For example, platinum resistance, copper resistance temperature sensor, is the change of the measured temperature into the resistance value; the thermistor is also the change […]

The input relay is used to take signals from external buttons, transfer switches, etc., as well as signals from photoelectric switches, proximity switches, pressure switches, etc. to the PLC. Input current 7mA Input delay time can be set (1~128ms)

First, overcurrent (OC) Overcurrent is the most frequent phenomenon of inverter alarms. 1.1 Phenomenon (1) When restarting, it will trip at a speed. This is a very serious overcurrent phenomenon. The main reasons are: load short circuit, mechanical parts are stuck; inverter module is damaged; motor torque is too small and so on. (2) Jumping […]

Due to the increasing number of applications and the increasing complexity of modern industrial production, the demand for more sophisticated and reliable sensors is increasing. For example, the identification of color detection and color change is more complicated. One of the applications, such as the packaging machine in which the machine is to determine which […]