Specifications

Section 11. Programming Resource Library

11-15

• 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.

For additional information, see the NL115 manual and CRBASIC Editor Help.

11.2.1 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 datalogger clock, collecting data, and displaying at the most current

record from the CR1000 data tables.

Data call-back and datalogger-to-datalogger communications are also possible

over TCP/IP. For details and example programs for callback and datalogger-

to-datalogger communications, see the NL115 manual.

11.2.2 HTTP Web Server

The CR1000 has a default home page built into the operating system. As

shown in FIGURE 11.2-1, this page provides links to the newest record in all

ables, 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.

FIGURE 11.2-1. CR1000 Default Home Page

Newest Record links refresh automatically every 10 seconds. Last 24 Records

link must be manually refreshed to see new data.