Welcome to Control.com, the global online community of automation professionals.
Control.com - Nerds in Control
Member Login
Search
Jump to a Date
Sponsored Communities
Cool stuff
Neat Stuff
Visit our shop for nerds in control lifestyle products.
Thermal Overload
The threads that wouldn't die...
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
Fortune
Serocki's Stricture:
Marriage is always a bachelor's last option.
Marriage is always a bachelor's last option.
RSS Feed
Use this link to get an RSS feed of the Control.com article flow, for private, non-commercial use only:www.control.com/rss/
To get a personalized feed, become a member at no cost.
from the Forum department...
DeviceNet explicit message help!!
Hi all,
I am developing a diagnostic OPC based device for use with DeviceNet networks using an embedded network card.
To date my software attempts to open explicit message connections with all 64 possible network nodes in order to establish what devices exist on the network.
I would now like to determine if devices that reply are master/slave type devices using explicit messaging. I'm 80% sure I need to use service code 0x0E which asks for individual attributes. I'm very confused about the rest of the message contents.
Can anyone help? I'd really appreciate it. Reading the DeviceNet spec hurts my head!!
I am developing a diagnostic OPC based device for use with DeviceNet networks using an embedded network card.
To date my software attempts to open explicit message connections with all 64 possible network nodes in order to establish what devices exist on the network.
I would now like to determine if devices that reply are master/slave type devices using explicit messaging. I'm 80% sure I need to use service code 0x0E which asks for individual attributes. I'm very confused about the rest of the message contents.
Can anyone help? I'd really appreciate it. Reading the DeviceNet spec hurts my head!!
From Control Engineering magazine...
Related articles from Control
Engineering magazine
- Ethernet Direct offers industrial IP66 cameras with Power over Ethernet
- Signal conditioners support universal input, feature detachable display
- Motion control: Omron selects EtherCAT as its next motion bus system
- Wireless: Adoption trends in factory automation
- Tutorial: Instrumentation / DCS integration languages, part 2: FDT
- Connectivity: Embedded LAN module with minimum programming
- New 1-1/8 in. M23 connectors provide 19 pins
- Hatching distributed automation architectures
Above articles copyright 2009 Reed Business Information.
Subject to its Terms of Use.
Your use of this site is subject to the terms and conditions set forth under Legal Notices and the Privacy Policy. Please read those terms and conditions carefully. Subject to the rights expressly reserved to others under Legal Notices, the content of this site and the compilation thereof is © 1999-2009 Control Technology Corporation. All rights reserved.
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Patronize our advertisers!