The productivity series of PLCs has Drum and Sequencer instruction. Drum instructions are great tools. They mimic an electromagnetic drum sequencer. Have you ever seen the mechanisms of a music box? Ok, so it’s a little drum with pegs that catch and flick the chimes in a particular sequence to play whatever tune is on the drum. So in the PLC, you can have a drum driven by an event, (input from a limit switch or button), or by time.
Sequencers are similar to drum instruction. The sequencer output can have up to 16 Boolean, Integer, or Numerical Tags per step. Drum instruction outputs are limited to the same 16 bit (Boolean) outputs. Each step in the sequencer can be defined by time or /and event and specified outputs can be set going into and out of the step. We will be discussing the drum and sequencer instructions in the Productivity Series PLC. Simple examples will be done to demonstrate the power of these instructions. Let’s get started.
More information can be obtained on our website. This includes all of the links mentioned in this video.
http://accautomation.ca/productivity-1000-series-plc-drum-sequencer-instructions
Previously in this Productivity 1000 Series PLC, we looked at the following:
System Hardware
http://accautomation.ca/productivity-1000-series-plc-system-hardware
Video
https://youtu.be/epzgojtd57U
Installing the Software
http://accautomation.ca/productivity-1000-series-plc-installing-the-software
Video
https://youtu.be/gh5X7_EeCdg
Establishing Communication
http://accautomation.ca/productivity-1000-series-plc-establishing-communication
Video
https://youtu.be/HWtN189JLgI
First Program
