the signal connection
1. Connect the PLC or PC
2. Connect the dedicated display switching instruments
1) If the parallel encoder output can be directly connected to PLC or PC input output contact I / O, its mathematical signal format should be a Gray code. Incremental and absolute encoder How many will take up the PLC how many contacts, if it is a 24 volt push-pull output, active high 1, a low level of 0; if it is an open-collector NPN output, the connection contacts must It is NPN type, the active-low, low level of 1.
2) If the incremental and absolute encoder is a serial output, due to limitations of the communication protocol, followed by electrical equipment must have a corresponding interface.
3) the incremental and absolute encoder output bus case, the receiving device to be equipped with a dedicated bus modules, such as PROFIBUS-DP.
However, if the bus select output of the encoder, in the middle of the incremental and absolute coderand the receiving device PLC, you can not add other display devices, for live shows, the signal will be transferred out of the match to give the signal indicator from the PLC.
Previous£º The choice of photoelectric encoder
