The micro-I/A approach supports: * One and only one PLC * Dual Nodebus interface * Single electronics If it were not for the limitation of support for one PLC it would be a very nice solution. Regards, Alex Johnson System Products - Invensys Systems, Inc. 10707 Haddington Houston, TX 77043 713.722.2859 (office) 713.722.2700 (switchboard) 713.932.0222 (fax) ajohnson@xxxxxxxxxxx <mailto:ajohnson@xxxxxxxxxxx> -----Original Message----- From: Chris Browder [SMTP:chris_browder@xxxxxxxxx] Sent: Friday, December 28, 2001 11:53 AM To: foxboro@xxxxxxxxxxxxx Subject: Re: [foxboro] Foxboro and Allen Bradley Not much to add, but aren't there MicroIA solutions available that will connect via ethernet/ip to PLC's? No one has mentioned them yet. There was also some talk a while back about there being a redundant option (in addition to fault tolerant) available in the future. If available the MicroIA would then be used instead of the AB30's... chris. --- Rick de la Cierva <rcierva@xxxxxxxxxxxxxxxx> wrote: > > Bob,=20 > > I think you caught many on vacation since this topic > usually has many > interested subscribers willing to dive in. While I > was at lunch tough I > did see Joe provided some feedback also. > > The AB30 is a standard Foxboro module that can be > configured redundant. > One of the ports is configured to communicate to the > CAM (see modules > listed below) that converts it to DH+. The > limitations are: "The Gateway > supports a maximum of 16 I/A Series Allen-Bradley > Scan Blocks (ABSCAN) > to perform input/output functions with up to eight > PLC controllers". I > believe these are not hard limitations but mostly > throughput limitations > one should follow. This module is basically just a > control processor 30 > that can interface to PLCs. It only performs control > functions. > > The Foxboro edocs indicate the interface modules > that can be used with > the the AB30 are " The Gateway interfaces to the > Allen-Bradley Data > Highway using 1771-KE/KF, 1770-KF2 Series B, or > 1779-KFL (in 1771-KE/KF > Emulation Mode) Communication Adapters". Note that > they are all for data > highway and not direct to ENET. I looked at the > information on the > 1761-NET-ENI and it seems like it should work also > but Rockwell has the > following note on their about this module: "Lets you > connect MicroLogix > (or other products with an RS-232-C port and DF1 > protocol) to an > EtherNet/IP network and initiate a single-hop > message with any > EtherNet/IP device via a connected CIP message. > Supports the NetLinx > services." - Note the single hop - I am not sure how > your network looks. > > As Joe indicated, the other options to go directly > to the PLCs on > Ethernet is using either a 51 series(Solaris) or 70 > series Integrator - > though these are not redundant. Basically these are > either a Sun Box or > a Windows NT PC that run the Foxboro blocks inside > and connect to the > PLC directly on Ethernet. I have not tried the 70 > series integrator but > have used the 51 series. On these AB Interchange > software is loaded and > is used to communicate to the PLCs. These also have > a lot more > horsepower for blocks and your limitation is not the > number of PLCs but > the throughput on the communication network and the > ability of the PLC > to respond in adequate time. Since you mention the > AB30 module I am > guessing you have a typical Foxboro nodebus system > and not a standard > Ethernet system. You can add a second Ethernet card > to these integrators > to connect them to the PLC Ethernet network and > connect the first > Ethernet to a DNBT cart so that the integrator is > also on your standard > Foxboro nodebus network. > > Give me a call if you want to discuss further. > > Rick de la Cierva > DLC SOLUTIONS CORP. > 203-207-9917 > > > -----Original Message----- > From: Marchal, Andre L. > [mailto:AMarchal@xxxxxxxxxxxxxxx]=20 > Sent: Friday, December 28, 2001 10:36 AM > To: 'foxboro@xxxxxxxxxxxxx' > Subject: Re: [foxboro] Foxboro and Allen Bradley > > > Bob, > > I also tried to connect an INT30 to Allen Bradley > 5/40E's without =3D > success. > I used an 1761-NET-ENI to do the DF1-RS232/Ethernet > conversion. > I do not know what the problem was (improper wiring, > protocol, etc...). > Please let me know if you find a successful method. > > Bob, this is what I understand: the INT30 for Allen > Bradley can =3D > communicate > with up to 8 PLCs. It has 2 redundant RS232 ports > (that is a powerful = > =3D > and > easy to use feature). If you want to communicate > with more PLCs, you = > =3D > would > have to use one of the configured PLCs as a "mail > box". > > Here is what I used for my test: > INT30=3D20 > SCSI cable P0500UX > Serial connector P0970VB > Ethernet interface 1761-NET-ENI (Allen Bradley) > Serial cable 1761-CBL-PM02 (Allen Bradley) > > Andr=3DE9 Marchal > -----Original Message----- > From: Robert Driscoll [mailto:rdrisco@xxxxxxxxxxx] > Sent: Friday, December 28, 2001 7:55 AM > To: foxboro@xxxxxxxxxxxxx > Subject: [foxboro] Foxboro and Allen Bradley > > > > Hello List, > > I am installing several Allen Bradley PLCs and I > want to connect them = > =3D > to a=3D20 > Foxboro system. I know a few things about the > Foxboro hardware but I = > =3D > have a > > few questions. > > How many PLCs can a single AB30 module be directly > connected to? The = > =3D > module > > has four ports, so I assume it can go to four > different PLCs? > > I read the Foxboro on-line document and it discussed > the RS232 = > direct=3D20 > connection to a PLC, or a connection through a CAM. > My PLCs will = > be=3D20 > networked together through a hub. Is there a > Foxboro way of =3D > communicating=3D20 > to the PLCs via ETHERNET? I could not find that in > the > documentation. Is it possible to connect the Fox > module(s) into the =3D > hub and > > have the devices talk that way? > > Any other pitfalls with the AB30 (or other modules > that may apply =3D > here)? > > Bob Driscoll > Bravo Northwest Power Systems > > > > _________________________________________________________________ > Join the world's largest e-mail service with MSN > Hotmail.=3D20 > http://www.hotmail.com > > =3D20 > =3D20 > ___________________________________________________________________ > This list is neither sponsored nor endorsed by The > Foxboro Company. > Use the information obtained here at your own risk. > For disclaimer, > see > http://www.thecassandraproject.org/disclaimer.html#maillist > > list info: http://www.freelists.org/list/foxboro > subscribe: > mailto:foxboro-request@xxxxxxxxxxxxx?subject=3D3Djoin > unsubscribe: > mailto:foxboro-request@xxxxxxxxxxxxx?subject=3D3Dleave > === message truncated === __________________________________________________ Do You Yahoo!? Send your FREE holiday greetings online! http://greetings.yahoo.com ___________________________________________________________________ This list is neither sponsored nor endorsed by The Foxboro Company. Use the information obtained here at your own risk. For disclaimer, see http://www.thecassandraproject.org/disclaimer.html#maillist list info: http://www.freelists.org/list/foxboro subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave ___________________________________________________________________ This list is neither sponsored nor endorsed by The Foxboro Company. Use the information obtained here at your own risk. For disclaimer, see http://www.thecassandraproject.org/disclaimer.html#maillist list info: http://www.freelists.org/list/foxboro subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave