ICP DAS USA 100-700 PLCS, DB25, DN-3000 user manual Wire RS422 or RS485 Communications

DeviceNet to PLCs or Devices

Use your computer’s UP/DOWN arrow keys to move through the PLC/Device Protocol List. Place the highlight bar on the desired Protocol and press the ENTER key. The software will enter this selection and automatically close the Protocol selection window. After the selection window closes, you will need to check the communications setting for the selected Protocol, making changes as necessary.

2 Wire RS422 or RS485 Communications

This box will only need to be checked if the communications with your PLC/Device is a 2-wire RS485 or RS422 interface. When 2-wire communications are being used, RTS must be looped back to CTS on the DN-3000 side of the cable. This can be done on the RS232 side by looping pins 4 and 5 or on the RS422/485 side by looping 16 to 18 and 17 to 19.

DN3000 Address

Some PLC/Device protocols require each PLC or Device on a network to be assigned a unique address. The DN3000 Address is the address assigned to the DN-3000 on the PLC/Device network.

Communications Settings

The communications settings are automatically set to the default values for each type of PLC/Device when its Protocol is first selected. Before changing any of these settings, consult your PLC/Device manual for the correct settings. To move between the communications settings, press the TAB or ENTER keys. To select a setting, use the UP/DOWN arrow key to move to the desired setting and press the SPACE BAR to enter or change your selection.

RTS Control (Request to Send Control)

RTS Control selection is an option provided for modems or for PLCs/Devices that require RTS to be active only while the DN-3000 is transmitting to the PLC. If RTS/CTS is selected, the DN-3000 will activate RTS and wait until CTS is active before transmitting to the PLC. If RTS Delay is selected, the DN-3000 will activate RTS and wait for the specified delay time to pass before transmitting to the PLC.

Response Time-Out

The Response Time-Out tells the DN-3000 how long to wait after transmitting a request to a PLC/Device if no response has been received from the PLC/Device. After this amount of time (specified in milliseconds) passes with no response being received, the DN-3000 will assume that no response is coming and will retry the request.

To save the configuration for Port #1, press the “Alt+S” keys or the F10 function key once and a small window appears stating the information was saved. Press the ENTER key, then the ESC key to return to the “EDIT” window.

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