| When using serial communications to AB
PLCs, the Citect KE drivers (KE2, KE3, KE5, KE250, KE500) operate
in half duplex mode Normally this is not a problem as the PLC is
set to operate in half duplex mode also. However in some cases full
duplex communications are needed, as for example to communicate to
the Teledenken Softwires PLC5 emulator.
To achieve full duplex you must use the Interchange drivers
(ABKT2, ABKT3, ABKT5, ABKT250). Normally these drivers use DH+ with
the 1784KT board, however this is not essential and the drivers can
be configured to use serial communications instead. They must use
the PC's COM ports, and the Interchange software and the PLC must
be set up to operate in full duplex mode.
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