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  1. #1
    Join Date
    Mar 2008
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    Indy
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    362

    Siemens PXC Controller

    Ran into the first PXC controller I've seen. Information is hard to come by on the Siemens site. It looks like you need software called Desigo Toolset and a new cable for the HMI port to configure it. Gone are the days of hyperterminal and the MMI port. Any information will be much appreciated.

  2. #2
    Join Date
    Sep 2007
    Posts
    211

    PXC

    The PXC compact has replaced the MEC and the PXC modular is a din rail controller. You can communicate with Hyperterminal thru the HMI port same as the legacy Siemens controllers. The HMI port is just the PC MMI port. Human Machine Interface compared to Man Machine Interface

  3. #3
    Join Date
    Jul 2008
    Location
    Louisiana
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    4
    The PXC Compact has not replaced the MEC yet, no FLN's. The MBC has been retired or is on its way this year and basically replaced by the modular (very simular in that it is buildable only much smaller). Both controllers fit on din rail however the compact has holes to be mounted with screws. You still use Hyperterminal to communicate. There is a slight difference in the db9 in that there are 2 groves on each side. I don't know how old your MMI cable is but these are the only ones available now-a-days, you can get a pack of db9's from walmart and just replace the ends they should allready have the grooves. I've also been told the old db9's do cause problems I don't remeber what the problem was I just trusted that someone found this out the hard way. They do have a USB port on them, on the compact this is for a printer I've been told on the modular you can use a USB cable you pick up from walmart or radio shack etc and communicate with hyperterminal. Just change com port settings in hyperterminal The reasoning for this is they say the computer industry is trying to move away from serial ports.

  4. #4
    Join Date
    Sep 2006
    Location
    Rhode Island
    Posts
    244
    One of the reasons I like Siemens Controls is because you can hook up to their main panels without having to have special software. All that is required is a terminal (laptop or handheld) and use any dumb terminal emulator. My preference is Procomm Plus but most people use Hyper Terminal. Or you can actually use a dumb terminal. The PXC still allows you to hook up this way and the menus still look something like an MBC but a little different. And yes as somebody already said........ the port is now called an HMI port and not an MMI port.

  5. #5
    Join Date
    Jul 2008
    Location
    Louisiana
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    4
    IF you have WCIS you can also use this program for terminal emulation.

  6. #6
    Join Date
    Mar 2006
    Location
    Chicagoland
    Posts
    44
    The PXC Compact Controller is a global product, used with both APOGEE (mostly US) and DESIGO (mostly Europe).

    It is available as a 16 point or 24 point unit (US) and as a 12 point or 22 point unit (EU).
    There are also extended temperature versions of the US models, which are rated for operation from -40C to +70C.

    The Compact Controllers are also available in a BACnet version

    Currently the Compact only has a USB device port, which may be used (depending upon the firmware revision) as a HMI port. I do not beleive that it is officially supported yet.

    The PXC Modular Controller also has a USB Device port, but also has a USB Host port, to support modem and printer functionality.

    The issue with the cables is related to the RJ12 connectors used for the MMI/HMI ports.
    The conectors in most MBC, MEC, and PXC controllers is an eight pin RJ12. The connectors on the MMI/HMI cables is a 6 pin connector. If the 6 pin connector does not have the groves for the other 2 pins it can mash down the contacts in the controller's connector.

  7. #7
    Join Date
    May 2008
    Posts
    16

    pxc

    Last time I worked on one I used hyperterminal and the MMI port.

  8. #8
    Join Date
    Mar 2008
    Location
    Concord, NH
    Posts
    116
    Quote Originally Posted by talbtimber View Post
    The PXC Compact has not replaced the MEC yet, no FLN's.
    The PXC Compact now has FLN support.

    Quote Originally Posted by talbtimber View Post
    There is a slight difference in the db9 in that there are 2 grooves on each side.
    Reference to DB9 = Standard RJ12 phone jack connector.

    Quote Originally Posted by talbtimber View Post
    They do have a USB port on them, on the compact this is for a printer I've been told on the modular you can use a USB cable you pick up from walmart or radio shack etc and communicate with hyperterminal.
    If the controller has a "B" type USB receptacle (looks like a square with two corners chopped off), then you can use an "A to B" USB cable to run HyperTerminal. However, this method requires a special driver that allows your PC to recognize the field panel as a virtual COM port. Panel upload/download and firmware flashing is not recommended via this interface just yet...

  9. #9
    Join Date
    Jun 2009
    Location
    earth, solar system, galactic system
    Posts
    6
    pxc16
    pxc24
    pxc36

    PXC24.2-FPE.A
    PXC36-FPE.A both is fln

  10. #10
    Join Date
    Jul 2006
    Location
    Boston,USA
    Posts
    33
    Can PXC work with a router to communicate with MSTP devices on another network or it only can function on the same network and needs some kind of proxy in order to talk to the devices on another network?

  11. #11
    Join Date
    Mar 2008
    Location
    Concord, NH
    Posts
    116
    When other BACnet devices are referenced in code (see http://hvac-talk.com/vbb/showthread....82#post5416082), the PXC will send out a Who-Is or Who-Has as appropriate to see if the device/point is accessible. Communicating between networks shouldn't be an issue.

  12. #12
    Join Date
    Jul 2006
    Location
    Boston,USA
    Posts
    33
    Quote Originally Posted by ntech64 View Post
    When other BACnet devices are referenced in code (see http://hvac-talk.com/vbb/showthread....82#post5416082), the PXC will send out a Who-Is or Who-Has as appropriate to see if the device/point is accessible. Communicating between networks shouldn't be an issue.
    So PXC modular and PXC compact both have network layer? Because Siemens states for PXC compact that it "Features Ethernet/IP and BACnet/IP options" http://www.buildingtechnologies.siem...c_compact.aspx

    while nothing about it for PXC modular http://www.buildingtechnologies.siem...c_compact.aspx

    So I would like to know if both of them have network layers e.g. communicate with devices on other network.

  13. #13
    Join Date
    Mar 2008
    Location
    Concord, NH
    Posts
    116
    The Compact and Modular both have these options for "ALN" communication (to other field panels or the operator workstation): Siemens P2 Protocol, Siemens P2 Ethernet (P3), BACnet/IP, or BACnet MSTP.

    The Compact has fixed/attached I/O, is limited to a maximum of one FLN, and has limited processing and memory capabilities. The Modular has modular I/O, 3 FLNs, and more processing and memory capabilities.

    The FLNs for the panels can talk Siemens P1 Protocol, BACnet MSTP, and some other integration protocols including Modbus.

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