Can I use the Configuration Table on my HI 1756 WS or 2WS?

This would depend on the version of firmware you have in the module.

If you have firmware version 1.0 to 2.2, then the module does not use the Configuration table.  When the module is added to the Processors I/O configuration, you would set the length of the Config to 0.

If you have firmware version 2.3 or higher, then the module can use the Configuration table.  You would set the length of the Config to either 64 bytes for a single channel module or 128 for a dual channel module.