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The LonWorks Board has an integrated circuit containing three processors, two timers, RAM, EEPROM, parallel and serial ports and a network communication port. The board communicates with the Controller Board via a parallel MIP interface. The MIP interface uses a token passing scheme so only the token holder can initiate a data transfer. The board also connects directly to a remote network using a free topology transceiver that operates at a rate of 78 kbps and connects up to 64 nodes over a twisted pair (see Section 5.0). The network wiring may be in a bus configuration or wired in any combination of bus, star or loop topologies. 13.5 LOCAL INSTRUMENT LINK (LIL) NETWORK BOARD An optional Local Instrument Link (LIL) Network Board is available in place of the Modbus communication network to provide higher speed networking and peer-to-peer communication between controllers. The hardware architecture is designed to accommodate other emerging fieldbus technologies. This includes both field communications that may require lower power for intrinsic safety and also higher speed for interplant networking. The LIL Board plugs into the controller board via two connectors. An 80-pin pass-through connector is also available for stacking additional option boards. The LIL Board communicates with the main Controller Board via a 32K, 8-bit Dual Port RAM. Two LED’s on the LIL Board indicate serial transmit and line activity. Global LIL function blocks (AIL, AOL, DIL, DOL) can be configured to provide communication between 353 controllers as well as connectivity to other LIL products, such as the Models 352, 351 and 382, over a twisted pair network. The total number of global function blocks will be limited by the number of global channels available. Information on LIL network communications and Data Mapping can be found in Sections 6 and 7.
Ethernet communications is available in place of Modbus and LIL communications. This option enables peer-topeer Ethernet communication (using embedded Modbus RTU protocol) with other Moore controllers, Procidia i|pac controllers, and other devices having Ethernet (embedded Modbus RTU protocol) functionality. Ethernet communications requires an optional Ethernet board and MPU Controller firmware V2.4 or higher. The Ethernet board supports uploading and downloading of controller configurations over the Ethernet LAN. Data can also be acquired from remote servers for the purpose of archiving and/or data mining. The Ethernet-Modbus Bridge in Figure 1-2 accepts an Ethernet data command from the controller and outputs an equivalent Modbus command. The returning Modbus data is embedded by the bridge in an Ethernet packet to be sent to the requesting controller. The Ethernet board plugs into and communicates with the controller board via an RS485 serial port. Board output is 10/100 Base T using an RJ45 connector. Ethernet function blocks are provided in V2.40 and higher MPU Controller board firmware. When an Ethernet board is installed, rear terminals NCA and NCB are disabled.