DH484 Communications

[George Graziano]

I have a 5/04 Processor and a Panelview 550, 2711-b5a9. It has 2 serial ports. The 5/04 2nd port goes to a 1761-net-AIC. It then goes to the Panelview serial port (Not the printer port).
So, a couple of questions, this was a piece of equipment working at another plant. I can't get the communications to work. The Panelview, I soldered the wires to a DB-9, pins 2,3 &5. The mini-din connector goes to the processor. The distance is about 50 feet total. At one time it looks like it went to a number of pieces on the line, but this is the only one I was told was working. Sould I go to a terminal block and put a terminating resistor on the panelview end? What pins? I know on the Net-AIC end to the the 2 termnals together for that terminating resistor.
Second question, I want to upload the panelview, I know I can't use the printer port, and have to disconnect the DH485 (This is not with the same setup above)Which cable is best to use?
Thanks
George

 

[Ken Roach]

There are several ports and protocols that could be mistaken for one another, here.

The "mini-DIN" connector on the SLC-5/04 controller is in parallel with the 3-pin black "Combicon" connector. These are Data Highway Plus (DH+) connectors and are physically jumpered together. These are considered Channel 1 on the SLC-5/04.

The DH+ port has nothing to do with this PanelView and it is NOT the same as RS-232. It should never be connected to RS-232; damage to one or both may ensue.

The DB9 serial connector on the SLC-5/04 is Channel 0. It's an RS-232 port that can run multiple protocols, including Data Highway 485 (DH485).

You can network together that PanelView and that SLC-5/04 Channel 0 (the serial port) either directly or using the 1761-NET-AIC isolator.

If you connect the PanelView directly to the SLC-5/04, use a straight-through RS-232 cable. The SLC-5/04 Channel 0 will need to be configured for DH485 protocol.

To connect to either of these devices you're going to need a DH485 interface to your computer. If you are running Windows XP SP2 or earlier, you can possibly use a straight-through serial cable (to the PanelView) or a null-modem serial cable (to the SLC-5/04 Channel 0) and use the old "1747-PIC/AIC+" driver in RSLinx.

The modern method for connecting to these devices is the 1747-UIC, a purpose-built USB to DH485 interface module.

 

[George Graziano]

Thanks Ken. The Mini-Din I was talking about was on the Net-AIC and goes to Channel 0 on the Processor. Since all the changes, would I be better of just running between the Processor and the Panelview, skipping the Net-AIC. If so, what would the pinout be using DB-9's on both ends?
Thanks
George

 

[George Graziano]

Thanks Ken. You sent me in the right direction. The Electrician's Wired one end to the 6 terminal block and the other end I put the 9 Pin connector on. It should have been 9 pin connectors on both ends.

Thanks
George