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Raypak B6000 manual 11.2.1.4Data Integrity, 11.2.2Modbus Register Map

Models: B6000

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11.2.1.4Data Integrity

As in all good protocols, there must exist a level of data integrity checking to verify, with some degree of assurance, the quality of the transmitted data. The Modbus protocol supports two types of error checking:

•RTU Mode: 16 bit cyclic redundancy check (CRC-16)

•One bit parity check

CRC-16:When the master generates a message, a 16 bit CRC value is added to the end of the transmitted packet. The CRC value is generated using a series of the bit shifts and manipulations. The receiving station executes the same calculation of the data and verifies the transmitted CRC. Any discrepancy will cause the message to be disregarded.

Parity: Parity checking can be added as an additional level of data security. If parity checking is selected, even or odd parity can be implemented.

11.2.2Modbus Register Map

A predefined register map has been provided for the T-3 unit. This map is detailed in Appendix A.

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Raypak B6000 manual 11.2.1.4Data Integrity, 11.2.2Modbus Register Map

Contents

Raypak B6000 Boiler Controller Installation and Operating ManualT-3 Raypak B6000 Modbus System Protocol Interface T-3Communications InterfaceTABLE OF CONTENTS COMPACT DISC CD ContentsT-3Raypak B6000 System Protocol Interface QuantityINSTALL CONDUIT AS APPROPRIATE T-3INSTALLATION AND MOUNTINGDIMENSIONS AND WEIGHT MECHANICAL INSTALLATIONWIRING T-3 AB = 108 Volts AC Minimum, 132 Volts MAX CHECK YOUR POWER SOURCEB6000 SYSTEM CONTROL BOARD AC = 108 Volts AC Minimum, 132 Volts MAXPage Protocol Interface 11.0.T-3Raypak B6000 Modbus Hardware Specifications 11.1. Product SpecificationsModbus Slave Specifications General Specifications11.2.1Modbus Communications 11.2.0Slave Port Functionality11.2.1.2Command Types 11.2.1.3Command Error Checking11.2.2Modbus Register Map 11.2.1.4Data Integrity11.3.1.2Dip Switch Configuration 11.3.0Hardware Setup11.3.1.11500 Interface Card Setup 11.3.1.1Connecting Power to the T-3CardIndicates Factory Setting 11.3.2B6000 Communications 11.3.1.3T-3Jumper Configurations11.4.2Modbus Error Codes 11.4.0Modbus Protocol Support11.4.1Modbus Commands Command11.5.1LED Indicators 11.5.0Diagnostics11.6.1Technical Support 11.6.0ProSoft Support, Service and Warranty11.6.2Service and Repair RAYPAK, INC. SERVICE DEPARTMENT LIMITED WARRANTY T-3APPENDIX A Modbus Register Map Function Function Function Boiler #2 Boiler #6 40070