Micromod MOD: MODBUS RTU Communications Guide Manual de usuario

MODBUS™ RTU Communications Guide for use with MODCELL, MOD 30ML and Commander Products

MODBUS RTUCOMUNICATIONS GUIDE6 SOFTWARE DRIVERSTable 3. Software DriversDriver Description Use With1719S Standard MODBUS Driver PC-30 and GFW1733S Ex

MODBUS RTUCOMUNICATIONS GUIDE7MODBUS WITH MODCELL MLP AND MOD30ML STANDARD PROTOCOL“Standard” MODBUS supports single-register, 16-bit integer values.

MODBUS RTUCOMUNICATIONS GUIDE8USING ML AND CL BLOCKS: DIRECTING DATA WITH ML AND CL BLOCKSCL blocks can be connected to MSC blocks, and are usually u

MODBUS RTUCOMUNICATIONS GUIDE9 BLOCK CONNECTIONS (Up to 99 Inputs per Block) Figure 3. Block Connections

MODBUS RTUCOMUNICATIONS GUIDE10USING MODBUS MODULES: MODULE LOCATIONThe sockets in which the module is installed determines its Port numberTable 4. M

MODBUS RTU COMUNICATIONS GUIDE 11 COMMRS485COMMDEFAULTSHIGH LOWCAT. NO.2034NZ10000AYESNOYESNOTERMRS232COMMDEFAULTSHIGH LOWCAT. NO.2033NZ10000AYESN

MODBUS RTUCOMUNICATIONS GUIDE12MODBUS MASTER MASTER REQUIREMENTSMODBUS Master communication requires a few special configuration items.1. MSC Block -

MODBUS RTUCOMUNICATIONS GUIDE13 INPUT CONVERT BLOCKOne expression block is required for each analog value read from the slave instrument, for data ty

MODBUS RTUCOMUNICATIONS GUIDE14MODBUS WITH COMMANDER SERIES INSTRUMENTS SCALING ANALOG VALUESThe first Commander instruments to support MODBUS handle

MODBUS RTUCOMUNICATIONS GUIDE15HOST CONFIGURATION EXAMPLES MODBUS WITH FIX AND COMMANDER 150Either the MB1 or EMP driver may be used, though EMP is r

MODBUS RTUCOMUNICATIONS GUIDE16 MODBUS WITH FIX AND COMMANDER 300Either the MB1 or EMP driver may be used, though EMP is recommended. The MODBUS gui

MODBUS RTUCOMUNICATIONS GUIDE17 MODBUS WITH INTOUCH AND COMMANDER 300Below are configuration entries that have been tested with the InTouch Modbus DD

MODBUS RTUCOMUNICATIONS GUIDE18 MODCELL MLP WITH TCP QUICKPANELTable 9. Wiring for RS-485 Full DuplexQuickPanel jr. Modcell MLPTXA 11 ————— 29-1 Rx+

MODBUS RTUCOMUNICATIONS GUIDE19 ScalingIn ML Block, specify actual range for variable, if the number of significant digits is 5 or less. For ranges w

MODBUS RTUCOMMUNICATIONS GUIDE20MOD30ML AND MODCELL MLP REFERENCE TABLESTable 11. MOD30ML and Modcell Multiloop Processor to Host Device or PC Sample

MODBUS RTUCOMMUNICATIONS GUIDE21Table 12. MODBUS Reference Information for MOD30 ML and Modcell CommunicationsCode Function Action Data Types Max Poi

MODBUS RTUCOMMUNICATIONS GUIDE22WIRE CONNECTIONSTable 13. Wire Connections for RS-232 DevicesPC Serial Port MOD30ML Mod RS-232 MOD30ML Modcell25-Pin

MODBUS RTUCOMMUNICATIONS GUIDE23MODBUS MODULE TROUBLESHOOTINGWITH MOD30ML AND MODCELL MLP* NOTE: The extended Modbus communications required for diagn

MODBUS RTUCOMMUNICATIONS GUIDE24

MODBUS RTUCOMMUNICATIONS GUIDE25GLOSSARYThe following terms are defined as they relate to this document. The definitions given here may not be thesam

MODBUS RTUCONTENTSiCONTENTSPageOVERVIEW ...

MODBUS RTUCOMMUNICATIONS GUIDE26PC Personal ComputerReceive Incoming communication signal. (Rx)RTS RequestToSend hardware handshaking signal. Used wit

The Company’s policy is one of continuous product improvement and the right is reserved to modify the information

MODBUS RTUCONTENTSiiTABLESPageTable 1. Cable Requirements ...

MODBUS RTUCOMUNICATIONS GUIDE1OVERVIEWMODBUS RTU is a non-proprietary serial communications protocol that is widely used in the process controlindustr

MODBUS RTUCOMUNICATIONS GUIDE2HARDWARE REQUIREMENTS SERIAL INTERFACE CONSIDERATIONSThe Modbus protocol communicates with the instrumentation by means

MODBUS RTUCOMUNICATIONS GUIDE3 RS-232 INTERFACEAn RS-232 interface is rated for distances up to 15 meters (50 feet). At least three wires are require

MODBUS RTUCOMUNICATIONS GUIDE42-Wire Configuration4-Wire ConfigurationFigure 1. RS-485 Biasing and Termination

MODBUS RTUCOMUNICATIONS GUIDE5SOFTWARE BASICS MASTER/SLAVE RELATIONSHIPA MODBUS RTU system consists of a Master and one or more Slave devices. Multip