BEWATOR COTAG 4101-2, Installation Handbook, Page: 134 / 158

4101-2 Controller Installation Handbook
19-2
If after doing this the cards cannot be read, then the next steps to
take are:
4. check that the readers are being polled by the Controllers by
seeing that the Tx LEDs on the reader modules are flashing - if
they are not then go back to step 1.
5. check that there is transmit range at the antennas using a 922
Test Card - if not then check cabling and then look for other
reasons.
6. if the cards are being read but the doors are not opening,
check Software configuration to see why cards are being
denied access.
Getting the comms working
RS485 connections betweem Comms module and
Controllers
You can test the RS485 comms even if the PC is not connected to the
system. Take the following steps:
1. Unplug the RS485 connectors from all the Controllers except
the one in which the type F Comms module is fitted. (The
RS485 connector is CONN2 on the Controller motherboards).
Leave the power connected to all the Controllers.
2. Unplug the power supply connector from the Controller with
the type F Comms module and then plug it back in again. This
causes the Comms module to perform its start up routine.
3. Watch the two amber LEDs labelled IN and OUT on the
Controller motherboard. A few seconds after the Controller is
powered up, the IN LED should flash once, immediately
followed by a flash on the out LED. This shows that the RS485
to this Controller is working.
4. Replace the RS485 connection to one of the other Controllers
and then repeat steps 2 and 3, watching the IN and OUT LEDs
on the newly connected Controller (you will probably need two
people to do this, one to power up the first Controller and
another to check the LEDs on the Controller you are testing). If
it works correctly, repeat the process for the next Controller,
and continue this process until they are all connected.
Conclusion : if the LEDs all flash correctly when you test each
Controller then the RS485 branch is working. If one of the Controllers
doesn’t give the correct LED flashes, check that switch 4 of the DIL
switch labelled SW3 on its motherboard is in the “OFF” position