FieldServer instruction manual Carrier DataLink Description, FS-8700-82 Carrier DataLink

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FS-8700-82 Carrier DataLink

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1.Carrier DataLink Description

The Carrier DataLink driver allows the FieldServer to transfer data to and from devices over either RS-232 or RS-485 using Carrier DataLink protocol. The FieldServer can emulate either a Server or Client.

The Carrier DataLink Serial Driver allows variables to be read and written in system elements connected to a Carrier Comfort Network communication bus. Up to 15 system elements may be connected to a DataLink Device. Display, Occupancy, Set Point Tables and Carrier Comfort Network (CCN) variables may be read or written.

The DataLink device provides a gateway to CCN devices. This driver polls the DataLink device which in turn reads/writes data to the CCN devices.

Carrier limits the number of CCN devices that can polled from a DataLink Device as well as the data that can be transferred between some CCN devices and the DataLink device. For information on these limitations please consult the Carrier Corporation.

The driver is an active client driver. This means that it initiates read/write polls with the DataLink device which is expected to provide responses. Server functionality is not intended to provide full emulation of DataLink Devices but can be extended on request.

The driver is configured to allow data tables to be read from the CCN devices via the DataLink device. As the tables typically contain more than one data element, the retrieved data is stored in a number of consecutive FieldServer data array locations in the FieldServer. The individual values cannot be scaled before they are stored. The driver can provide descriptions for each of the table values retrieved. Descriptions are stored in ASCII in a separate data array.

The driver can be configured to read a specific variable from a CNN device and store its value using optional scaling in a configurable location in a FieldServer data array.

The driver can be configured to write a value (using optional scaling) from a FieldServer data array to a specific variable in a CNN device, provided that the variable allows its value to be written.

The driver has no advanced knowledge of the CCN devices and their data tables. Therefore it cannot validate table names or variable names specified in the configuration file. This means that the driver handles each table in a generic way, without regard for the particular variables that constitute the tables.

It is important that you understand the limitations and exclusions of this driver. Refer to Section 5.4 for more information.

FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com Tel: (408) 262-2299 Fax: (408) 262-9042 Toll_Free: 888-509-1970 email: support@fieldserver.com

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Contents
FS-8700-82 Carrier DataLink Table of Contents FS-8700-82 Carrier DataLink Carrier DataLink DescriptionFieldServer Technologies Provided by Suppler of 3 rd Party EquipmentHardware Connections Column Title Function Legal Values Configuring the FieldServer as a Carrier DataLink ClientData Arrays/Descriptors Section TitleSecond Client Side Connection DescriptionsFS-8700-82 Carrier DataLink Example NoneClient Side Node Descriptors Column Function Legal Values TitleRDBC, WRBC, Wrbx ‘EVERYTHING’ Driver Related Map Descriptor ParametersTiming Parameters TZONE1’Map Descriptor Example 1 Read a Table Map Descriptor Example 3 Write a Variable Map Descriptor Example 2 Read a VariableMap Descriptor Example 4 Write Day of Week DOW or Time Server Side Connection Descriptors Configuring the FieldServer as a Carrier DataLink ServerServer Side Nodes Driver Specific Map Descriptor Parameters Timing Parameters Map Descriptor Example General Driver Limitations and ExclusionsAs a client As a serverEquipment Type Table Name Appendix A. Advanced Topics Appendix A.1. Table NamesFS-8700-82 Carrier DataLink Equipment Type Table Name Dadump DEV 02 Display Appendix A.3.3. Client writes a variable Appendix A.3. Map Descriptor Length ExplainedAppendix A.3.1. Client Reads a Table Appendix A.3.2. Client reads a variableFS-8700-82 Carrier DataLinkPage 24 Appendix A.4.2. Extending the List of Discrete State WordsAppendix A.5. Timing Considerations Appendix A.4.3. Time ValuesAppendix A.4.4. Numeric Values Appendix A.4.5. Occupancy Strings / ValuesAppendix B. Carrier DataLink Device Error Response Message Explanation ActionNack Dacarrierstats Appendix C. Driver Notes Appendix C.1. Driver StatsOffset Description Appendix D. Driver Error Messages Error Message ExplanationEverything FS-8700-82 Carrier DataLink Error Message Explanation This page Intentionally Left Blank