文件名称：Modbus® RTU Serial Communications User Manual
文件大小：439KB
文件格式：PDF
更新时间：2014-06-26 11:36:32
Modbus® RTU Serial Communications User
This implementation is designed to provide a popular data exchange ormat connecting these instruments to both Honeywell and foreign master devices. The Modbus RTU allows the instrument to be a citizen on adata link shared with other devices that subscribe to the Modbus RTU RS-485 specification.These instruments DO NOT emulate any MODICON type device. The Modbus RTU specification is respected in the physical and data link layers. The essage structure of the Modbus RTU function codes is employed and standard IEEE 32-bit floating point and integer formats are used. Data register mapping is unique to these instruments. The definition in Table 2-1 is the register mapping for many Honeywell instruments and the corresponding parameter value within those instruments.