Campbell Scientific CR1000KD CR1000 Measurement and Control System - Page 167
PakBus Over TCP/IP and Callback, 8.2.2 Default HTTP Web Server
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Section 7. Installation • PakBus communication over TCP/IP. • Callback (datalogger-initiated communication) using the CRBasic TCPOpen() instruction • Datalogger-to-datalogger communication • HTTP protocol and web server • FTP server and client for transferring files to and from the datalogger • TelNet server for debugging and entry into terminal mode • SNMP for NTCIP and RWIS applications • PING • Micro-serial server using CRBasic serial I/O functions with TCP sockets as "COM Ports" • Modbus/TCP/IP, master and slave • DHCP client to obtain an IP address • DNS client to query a DNS server to map a name into an IP address • SMTP to send email messages 7.8.2.1 PakBus Over TCP/IP and Callback Once the hardware has been configured, basic PakBus® communication over TCP/IP is possible. These functions include sending and retrieving programs, setting the CR1000 clock, collecting data, and displaying at the most current record from the CR1000 data tables. Data callback and datalogger-to-datalogger communications are also possible over TCP/IP. For details and example programs for callback and datalogger-todatalogger communications, see the network-link manual. A listing of networklink model numbers is found in the appendix Network Links (p. 567). 7.8.2.2 Default HTTP Web Server The CR1000 has a default home page built into the operating system. The home page can be accessed using the following URL: http:\\ipaddress:80 Note Port 80 is implied if the port is not otherwise specified. As shown in the figure, Preconfigured HTML Home Page (p. 168), this page provides links to the newest record in all tables, including the Status table, Public table, and data tables. Links are also provided for the last 24 records in each data table. If fewer than 24 records have been stored in a data table, the link will display all data in that table. Newest-Record links refresh automatically every 10 seconds. Last 24-Records link must be manually refreshed to see new data. Links will also be created automatically for any HTML, XML, and JPEG files found on the CR1000 drives. To copy files to these drives, choose File Control from the support software menu. 167