Special options are used to configure the
serial drivers for unusual protocols. Some protocol drivers require
special options to operate effectively. The online help associated
with the protocol documents any special options that are required
for each protocol. Note that not all serial boards support these
options. If your PLC protocol needs an option, and the serial board
does not support it, your protocol cannot use that serial board.
The following is a listing of the supported special options:
| Option
|
Board
|
Description
|
| -h
|
COMXi, PCXi,
MCXi
|
Enable hardware hand
shaking, use DTR for receive enable, and CTS for transmit enable.
When this option is enabled the serial board will not transmit
unless CTS is enabled. This option is used as some PLCs require
hardware hand shaking to operate reliably
|
| -m
|
PCXi, MCXi
|
Abandon transmit if CTS
or DCD is off. When this option is enabled the serial board will
reject the transmission if CTS or DCD is disabled. This option is
used with the CINET when modems are used. This prevents clashes
when two Citect try to transmit at the same time.
|
|
