DeviceNet Thick Cable Communication Media
DeviceNet network can use Thick Cable, Thin Cable, and Flat Cable types for communication. Some of the features and qualities of the thick cable type used in DeviceNet networks are: The Signal pair (#18) is the blue/white wire Power pair (#15) is the black/red wire PVC/nylon insulation on power pair Industrial temperature range Storage: -40o [...]
Some Good Automation & PLC Books
Here is a list of suggested books to read on automation, control, and PLCs: Fundamentals of Programmable Logic Controllers, Sensors, and Communication ~ $110.00 Author: Jon Stenerson Published: January 2004 Content: Safety/logout/tagout Major brands of PLCs Input/output modules and wiring IEC 61131-3 programming Communications, including industrial buses Sensors, sensor wiring, and applications Supervisory. Control and [...]
Repeaters in ControlNet Network Topologies
Repeaters can be used in various topologies in ControlNet networks. Following are the four topologies with their features: Bus Topology Repeaters have to be in series. This is the most basic (and more common) layout Star Topology Repeaters are configured as hubs in this configuration Tree Topology Repeaters have to be in parallel form This [...]
Electronic Keying Mismatch in RSLogix
There are few major reasons why you would get electronic keying mismatch error in RSLogix. Major / Minor Revisions If the major or minor revisions of the module in the chassis does not match the one set in the program you will get the keying mismatch error. Catalog Number of the module If the catalog [...]
ControlLogix Message Instruction Path
To write a message instruction (MSG) in ControlLogix one needs to give it a path to define where it needs to go. Following is how to set that communication path. The path looks something like this: What do the numbers mean? Pay attention that the numbers below don’t necessary correspond to the position in the [...]
What does OUI Stand for?
OUI stands for Organizational Unique Identifier
What do CAN, WAN, GAN, LAN, MAN Stand For?
These are all networks related terms. CAN: Campus Area Network WAN: Wide Area Network GAN: Global Area Network LAN: Local Area Network MAN: Metropolitan Area Network
How to Inhibit a Task Programmatically in ControlLogix
To programmatically inhibit a task in ControlLogix (RSLoigx 5000) you have to use the SSV instruction.
ControlLogix Coordinated System Time
In ControlLogix the coordinated system time is 64 microseconds.
ControlLogix Flashing Green I/O LED Controller
In ControlLogix flashing green I/O LED means Problem with I/O configuration however it is not a major fault.