The SmartBob II Momentum Universal Communication Module (MUCM) is used when performing communication translations between serial protocols. The MUCM has a pre-loaded SmartBob II application that has been compiled and downloaded into the Flash memory. The standard SmartBob II MUCM allows a Modbus serial master to gather data from up to 32 BinMaster SmartBob II remotes. The data from each SmartBob II remote is presented as a Modbus Holding Register (4x). Each bob is assigned a unique Modbus slave address. A special Modbus slave address of 247 is provided to initiate a measurement and to give a summary of all the measurements from the SmartBob Remotes in the network. The MUCM may be configured as a Modbus RTU or a Modbus ASCII slave. The system shown in figure 1.1 shows a Modbus Master (HMI,DCS,or PLC), a SmartBob II MUCM, and eight SmartBob II remotes located on vessels. The Modbus RTU master has an RS-232 port that connects to the MUCM. The SmartBob remotes are connected to the MUCM via a multi-drop RS-485 network, are set for slave addresses 1 through 8, and are mapped to Modbus slave addresses 1 through 8 respectively.

MUCM Features

• Optional Communication Adapter Tophats are available in Ethernet, DeviceNet™, Profibus™, and Modbus Plus. Once the data has been passed to a tophat it is available to everything on the network including PLCs, HMIs or SCADA systems
• The MUCM can also be used simply to save wiring and installation costs, allowing serial devices to make use of existing network cable and to overcome distance limitations
• Allows the operator to tie SmartBob II remotes into an existing control system
• Eliminate Analog I/O Cards
• Easy to program