Applies To:
  • CitectSCADA 1.00, 1.01, 1.10, 1.11, 1.20, 2.00, 2.01

Question: What are all the special options available for serial drivers? 

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.