CTT Counter Timer Tachometer – Tachometer Mode

The CTT series from Automation Direct are multi-function digital units. They incorporate a multi-function digital counter, timer and tachometer all within the same unit. Tachometer mode will bring in pulses that can be from a sensor, incremental encoder, etc. and convert this to a rate. Rates such as speed or frequency deal with units per time. The CTT makes converting and using these pulses easy. The tachometer mode has four different output settings; 2Lo1Lo, 2Lo1Hi, 2Hi1Lo and 2Hi1Hi.

We will be reviewing the tachometer mode of the CTT and programming a rate based on the frequency of a relay output of a PLC. Let’s get started. Continue Reading!

Productivity 1000 Series PLC Modbus TCP Ethernet Communication

The productivity series of PLCs comes with 4 built-in communication ports for easy connectivity to your PC or various industrial networks. Ethernet protocols like Modbus TCP can be utilized with the RJ45 port on this PLC. Modbus TCP is an open (published) protocol that uses the Server (Master) / Client (Slave) architecture. It’s a very common protocol used in industrial automation controls.

We will be using the RJ45 (Ethernet) port to communicate to a Click PLC. Modbus TCP will be the protocol used on this Ethernet communication media. The Productivity 1000 PLC will be the server and the Click PLC will be the client. We will be creating a network between the two PLC units. A heartbeat will be used so if communications is lost, the server (slave) will know. The throughput time will be timed by using a small program in the Click PLC. You will soon see how the Productivity Series of PLC’s is the best way to handle communication to other devices. Let’s get started. Continue Reading!

C-More Micro HMI Object Text

The C-More Micro HMI Panel software uses virtual components called Objects. Five different text objects are available for your industrial human machine interface. (HMI) Static text will place words on your HMI page. Lookup text will display a message corresponding to a value in a tag register. Dynamic text will display the ASCII (American Standard Code for Information Interchange) equivalent of the information in the tag register specified. Scroll text will display information too large to display in the area assigned. This will move the information in the display area so the entire message can be seen. Text entry will allow the user through a pop up key pad to enter ASCII characters into a tag register.

We will now look at all five of these text objects our HMI micro panel. A new page will be made to show all of the text object functions and operations. Let’s get started. Continue Reading!