Micrologix 1500 with 1400 through DeviceNet?

[asteroide 0]

Hi Friends I need to communicate a ML1500 with a ML1400 through DeviceNet. ML1500 has 1769-SDN Scanner, ML1400 has 1761-NET-DNI Interface According with 1769-SDN User Manual this connection is possible, but May I control tags (input, outputs, counters, timers, registers, etc) between ML1500 and ML1400? What do I need? Do you have a little example? Also, can I connect an HMI like PanelView C600, to monitor/control both PLC´s? I mean just 1 HMI for ML1500 and ML1400, I think this is possible through DH485 port, but I am not sure. Any comment is appreciated. :D Thanks in advance

[dmargineau 6]

As a general rule, you could "share" CPU ownership of only Input type modules; the Output modules could be owned by only one CPU, however, any peer-to-peer networked CPU could "listen" to the output data. The 1761-NET-DNI interface is a DF1 (RS232) to DeviceNet protocol converter which allows I/O data transfer between the DF1 connected device (ML1400 in your case) and a DeviceNet master (the 1769-SDN scanner) and also allowing explicit type (MSG) data transfer over the implemented DeviceNet networking. You could use the MLs I/O data within both both CPU applications (according to the above mentioned "general rule") however, the applications' counters, timers or registers data to be "shared" will have to be "explicitly" messaged between the two controllers using Read/Write MSG instructions just as in any other type of multiple controller application implementation: you cannot use "implicit" type communications (Produce/Consume) on a MicroLogix platform. Also, you will have to observe that all the input and output comments are referenced from the perspective of the DeviceNet Master, the ML1500 owned 1769-SDN scanner in your case. I have personally never "connected" two MLs via DeviceNet, however, you will need to do the "homework" and allow for plenty of "development time"... ...It will be pretty tedious if you have not previously done it, but it will work... About the PanelView Component terminal...It was specifically developed to be used on MicroLogix CPU platforms; the C600 model offers both Ethernet and RS232 (DF1 or DH485)/RS422/RS485 communications. However, I don't believe you will be able to use one Component class HMI "connected" to two CPUs by just configuring of two communications paths within the HMI application; this scenario is achievable only when using the PanelView Standard (Silver Series as we "speak"!) or PanelView Plus/PanelView Plus 6 HMI terminals; within your proposed topology, you could send/receive the HMI data to/from the "unconnected" CPU by MSGing between the "connected" CPU and the "unconnected" one. Again, it will be quite some task, viable though... As for pre-requisite software, you will need RSLogix Micro (I'd suggest the Developer edition-9324-RLM0800ENE) or RSLogix 500 (at least the Standard edition-9324-RL0300ENE ) and RSNetWorx for DeviceNet (9357-DNETL3) The following links need to be thoroughly studied prior to the task's commencement: http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1769-um009_-en-p.pdf http://literature.rockwellautomation.com/idc/groups/literature/documents/gr/dnet-gr001_-en-e.pdf http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1761-um005_-en-p.pdf http://literature.rockwellautomation.com/idc/groups/literature/documents/qs/2711c-qs001_-en-p.pdf Good luck... Edited 12 Apr 2013 by dmargineau