Methods for solving the problem of lack of inputs and outputs of programmable logic controllers during construction of automated control systems
Abstract
Methods for solving the problem of lack of inputs and outputs of programmable logic controllers during construction of automated control systems
Incoming article date: 03.08.2024The article discusses various methods for solving the problem of lack of inputs and outputs of programmable logic controllers during construction of automated control systems. The control signals that the controller operates can be divided into two categories: the first one is responsible for direct control of the equipment system and the second one organizes the human-machine interface (HMI). The methods described in the article allow to significantly reduce the load of HMI on controller or delegate them to the operator's touch panel completely. An example of interaction between the controller and the operator panel via the MODBUS protocol is given. The pros and cons of the described methods, as well as the conditions under which they are preferable, are listed.
Keywords: programmable logic controller, programmable relay, operator touch panel, human-machine interface, control signal