Device Properties — Communications Parameters
I/O Unit (MMIO)
The I/O Unit properties are used to access memory mapped data using the MMIO protocol. Descriptions of the properties are as follows:
• I/O Unit IP Protocol Options include TCP/IP or UDP. The default setting is TCP/IP.Note: Although TCP is a more reliable protocol, it requires more network overhead. Devices will accept a limited number of TCP connections. Once the limit is reached, the driver will not be able to communicate with the device using TCP.
• I/O Unit Port Number This property specifies the port number that the device has been configured to use for MMIO communications. The default setting is 2001.
Control Engine (CONT)
The Control Engine properties are used to access strategy variables using the CONT protocol. Description of the property is as follows:
• Control Engine Port Number This property specifies the port number that the device has been configured to use for CONT communications. The default setting is 22001.
Note: The PAC Control (or other similar tool) can be used to configure devices for MMIO and CONT communications. For instructions and additional information on setting up each device, refer to the Opto 22 User Guides.