Timer One Hour PLC Programming

A one-hour timer can easily be programmed in a PLC. Most PLCs will have system pulse bits that turn on and off at a specific frequency. We use the free, fully functional Do-More Designer PLC software and simulator. The 1-second pulse bit is used as the input rung condition to a counter. The set value of the counter is 3600. Three thousand six hundred seconds equals one hour, so our counter output done bit will come on each hour. When the one-hour done bit comes on, it will reset the counter so we can count the next hour. It will also increment the total hours counted. This is just one way to create a one-hour timer. How many more ways can you create a timer for one hour? Programming and examples of the BRX Do-More series can be found at this URL: https://accautomation.ca/series/brx-do-more-plc/ There are several reasons why we are using the BRX Do-More Controller. Here are just a few. – Standalone PLC with built-in I/O – Built-in Data Logging – Communication ability – Ethernet Port, RS232, RS485, USB – support for protocols such as Modbus RTU, Modbus TCP, ASCII, K-sequence (DirectLOGIC users), Custom Protocols (ASCII over serial, TCP or UDP over Ethernet) – Built-in Analog input and output – Integrated motion control – High-speed counters – Powerful instruction set (Video of Instructions in software) – Ability to expand the system with a variety of modules