User manual

NIC-485 Setup and Testing
18
6.0 NIC-485 SETUP AND TESTING
The NIC-485 has a specific setup that must be in place before the card
will function properly. There are jumpers on the board that must be in
the correct locations. The positions of these jumpers are numbered on
the board itself. A small triangle silk screened on the board represents
pin 1 for each set of pins to which jumpers may be applied.
6.1 Jumper Placements
J13, J14, and J18 on the board must have jumpers installed on them.
J32 must have a jumper installed on pins 2 and 3.
J28 jumper positions will apply to future capabilities, but are not cur-
rently usable on the NIC-485.
6.2 Service Terminal Troubleshooting
If the card does not bring up a Service Terminal, check link light DS9.
DS9 should be illuminated within approximately 0.5 seconds of appli-
cation of power. If DS9 is not illuminated and no other LED's are on,
verify that power has been applied to the card. If power has been
applied, verify wiring connected to TB3 is correct. TB3 should have
24VAC or 12 VDC applied. Reboot the card once the power to the card
has been verified.
6.3 Modbus Troubleshooting
If the card does not respond to Modbus requests, verify that DS7,
“repeater port receive” is flashing during a request. In proper commu-
nication DS12 will also be flashing indicating, “repeater port trans-
mit”
Verify proper wiring on the EIA 485 network. Each OpenComms NIC-
485 should observe a “plus to plus” and “minus to minus” daisy chain
configuration.
Also verify that the proper slave ID has been set in service terminal.
Refer to 3.2 - Service Terminal for initiating a service terminal ses-
sion
NOTE
Your card was shipped with the jumpers properly installed.