Multiple RS232 ports on ControlLogix

[BudMan 1]

How can I hook multiple RS-232 devices to a single ControlLogix system?? It does not look like AB has a seperate network card for RS-232. Thanks Bud

[Ken Moore 23]

Never tried it, but this may work: http://tomantron.com/index.html

[Ken Roach 194]

It depends on what you want the serial ports for. If you are looking to connect serially and go online with RSLogix 5000, then only the Channel 0 serial port does what you want. For ASCII, DF1, or Modbus connections, the most powerful and functional option is the MVI56 series of modules from Prosoft. For simpler ASCII applications, I use the 1734-232ASC modules for the POINT platform, or DeviceNet/ASCII gateways. There are a handful of ControlNet and EtherNet/IP interfaces to ASCII or DF1 from Prosoft and HMS Fieldbus.

[Stupidav 1]

With a Home made cable. Dev 1 - TX to RX on - Dev 2 - TX to RX on Dev 3 - TX to RX on Dev 1. Just remeber to set the addresses on each device.

[BudMan 1]

Thanks All. I like the Point I/O method. Multiple ASCII devices (Bar Code Scanner, Communication to a CNC computer (Seimens) and communication to a few Keyence laser measurment sensors). Thanks again for tickling the thought provoking synapses. Bud

[Chris Elston 79]

I SECOND what Ken Roach says: check out my article: http://www.mrplc.com/kb/index.php?page=ind...;id=80&c=29 Those point I/O RS-232 on Devicenet is really, really slick....unlimited almost too...

[BudMan 1]

Thanks chakorules, nice article. Good use of rung comments. I realy like the "Stupid DeviceNet" comment, but I understand the frustration when tripping across the need for btye swap. Bud

[Chris Elston 79]

eh....yeah...just ignore that part...it wasn't stupid after awhile...I make some retarded comments some times...notes to self. If anyone reads my normal everyday rung comments (management wise), I probablly would have lost my job or got escorted out of the plant I was working at...

[Clay B. 1]

This might be a bit off topic but I just did a Micrologic 1500 with a dual port ASCII card. In the channel configuration it had a swap bit function does the Device Net not have this feature?

[Rick-435NBx 0]

Hi Bud, We have a product that will send ASCII data right into your tag in the PLC. Very simple. It's been really popular. You can take a look at it here: http://www.rtaautomation.com/ethernetip/435nba/ Rick