Introduction to Training for Allen Bradley PLC-5 with RSLogix It’s getting more difficult to find Training for Allen Bradley PLC-5. Anyone who has worked in industry over the past 30 years has probably worked with this processor. The PLC-5 was a very reliable, durable workhorse that is now obsolete. Even Read More »
Introduction to PLC-5 Data Files PLC-5 Data Files store data. On the other hand, PLC-5 Program Files will manipulate data. In this section, we’ll discuss each type of default data file. At the same time, we’ll talk about various instructions that utilize each data file. It’s important to realize that Read More »
PLC-5 Latch Vs Seal There are a few differences in the PLC-5 Latch Vs Seal. In this section, I’ll explain the operating of each type, and some dangers associated with both methods. Always be very careful when making any changes to the PLC program. Undoubtedly, you will want to get Read More »
Introduction to PLC-5 Counters PLC-5 Counters count rung transitions. More specifically, the counters count the false to true transition. In the PLC-5, there are two types of counters: The Up Counter (CTU), and the Down Counter (CTD). While you won’t always see a CTD, it’s almost always associated with a Read More »
Introduction to PLC-5 Timers There are three types of PLC-5 Timers that we will cover in this section: TON, TOF, and RTO. Generally, the TON (Timer On Delay) instruction delays the DN (Done) bit from going true. On the other hand, the TOF (Off Delay Timer) delays the DN bit Read More »
Introduction to PLC-5 Addressing PLC-5 Addressing is based on a 1970’s I/O Structure. To begin with, all of the I/O is in the OCTAL numbering system. In other words, there are no 8’s or 9’s anywhere in the PLC-5 I/O. To emphasize, timer files, as well as other types of Read More »
Introduction to Rockwell Icom AI5 Software We used Rockwell Icom AI5 Software to program and troubleshoot the PLC-5 processor before RSLogix 5 came along. As a nostalgic post, I wanted to go back and review this legacy software. Those proficient with AI software claim they could navigate the software much Read More »
Introduction to the PLC-5 Day of Week Counter A PLC-5 Day of week counter is an easy way to find the day of the week for certain events in automation. For example: You want to test an alarm every Monday at 10am. There are complex algorithms that will calculate the Read More »
Introduction to PLC-5 Block Transfers One of the most difficult concepts for most people to grasp is the PLC-5 Block Transfers. Think of Block Transfers as simply a copy instruction. You are copying data from a module to somewhere else in the memory of the processor. The Block Transfer Read Read More »
Introduction to the 1785-KE Module The 1785-KE module allows you to easily interface with a Data Highway Plus (DH+) Network. Although there are other ways to interface with DH+, I have found this method to be the most cost effective. For example: The 1784-U2DHP module could cost over $2000. You Read More »
