Campbell-scientific CR1000 Measurement and Control System Uživatelský manuál stáhnout pdf (Strana 368)

100

101

Section 8. Operation

368



8.6.2.2 Terminology

Table Modbus to Campbell Scientific Equivalents (p. 368) lists terminology

equivalents to aid in understanding how CR1000s fit into a SCADA system.

Table 88. Modbus to Campbell Scientific Equivalents

Modbus Domain Data Form Campbell Scientific Domain

Coils Single Bit Ports, Flags, Boolean Variables

Digital Registers 16-bit Word Floating Point Variables

Input Registers 16-bit Word Floating Point Variables

Holding Registers 16-bit Word Floating Point Variables

RTU / PLC CR1000

Master Usually a computer

Slave Usually a CR1000

Field Instrument Sensor



8.6.2.2.1 Glossary of Terms

Coils(00001to09999)

Originally,"coils"referredtorelaycoils.InCR1000s,coilsareexclusively

ports,flags,oraBoolean‐variablearray.Portsareinferredifparameter

5oftheModbusSlave()instructionissetto0.Coilsareassignedto

Modbusregisters00001to09999.

DigitalRegisters10001‐19999

Holdvaluesresultingfromadigitalmeasurement.Digitalregistersinthe

Modbusdomainareread‐only.IntheCampbellScientificdomain,the

leadingdigitinModbusregistersisignored,andsoareassigned

togethertoasingleDim‐orPublic‐variablearray(read/write).

InputRegisters30001‐39999

Holdvaluesresultingfromananalogmeasurement.Inputregistersin

theModbusdomainareread‐only.IntheCampbellScientificdomain,

theleadingdigitinModbusregistersisignored,andsoareassigned

togethertoasingleDim‐orPublic‐variablearray(read/write).

HoldingRegisters40001‐49999

Holdvaluesresultingfromaprogrammingaction.Holdingregistersin

theModbusdomainareread/write.IntheCampbellScientificdomain,

theleadingdigitinModbusregistersisignored,andsoareassigned

togethertoasingleDim‐orPublic‐variablearray(read/write).

1 2 ... 363 364 365 366 367 368 369 370 371 372 373 ... 587 588

Komentáře k této Příručce

Žádné komentáře

Campbell-scientific CR1000 Measurement and Control System Uživatelský manuál Strana 368

Komentáře k této Příručce

Související produkty a manuály pro Měřící nástroje Campbell-scientific CR1000 Measurement and Control System