Modicon offers a weighing system in Momentum and Premium PLC platforms. The Momentum package is a Momentum IO base, which can be attached to a CPU or a communication adapter.
"www.niobrara.com":http://www.niobrara.com offers a modbus rs232 or rs485 comm adapter that could be used with the modicon load cell/weighting unit. The other option is to use a momentum processor with an serial port.