FX16 Master Controller Technical Bulletin 77Gateway Function (LP-FX16X Rev. A Only)The FX16 Master Controller (Rev. A) features the Gateway object. TheGateway object can monitor up to 16 slave devices on the Local LinkExtension Bus that are not part of a Distributed Application. Theseslave devices can be FX controllers with an RS-485 N2 Opencommunication card or N2 Open VND (Vendor) devices that areMetasys compatible. System 91 N2 devices (DX-9100 and TC-910x)are also supported.When you evaluate the performance of the Local Link Extension Bus,you must include controllers connected as devices monitored by aGateway object. You should connect no more than 16 devices and thenumber of physical input/output data points should not exceed 300 for areasonable response (3 to 4 seconds on average) within a controlsequence. If you require a faster response time, then you must reducethe number of devices and data points. You should also perform aphysical test made with the configuration to measure the actual responsetimes.Use the Gateway function to connect the sensor and/or actuators deviceswith an N2 Open serial interface (such as a variable speed motor drive).
