Specifications

Section 11. Programming Resource Library

11-20

has, then the hostname can be used interchangeably with the IP address in

some datalogger instructions.

11.2.12 SMTP

Simple Mail Transfer Protocol (SMTP) is the standard for e-mail

transmissions. The CR1000 can be programmed to send e-mail messages on a

regular schedule or based on the occurrence of an event.

11.3 SDI-12 Sensor Support

11.3.1 SDI-12 Transparent Mode

Using the SDI12Recorder instruction, the CR1000 interrogates SDI-12 sensors

attached to terminals C1, C3, C5, and C7. Several SDI-12 probes can be wired

to each terminal so long as each probe has a unique address and its own

SDI12Recorder instruction.

System operators can manually interrogate and enter settings in probes using

SDI-12 Transparent Mode as supported by the CR1000. Transparent mode is

useful in troubleshooting SDI-12 systems because it allows direct

communication with SDI-12 probes.

Transparent mode may need to wait for programmed datalogger commands to

finish before sending responses. While in the transparent mode, datalogger

programs may not execute. Datalogger security may need to be unlocked

before transparent mode can be activated.

Transparent mode is entered while the PC is in telecommunications with the

datalogger through a terminal emulator program. It is most easily accessed

through Campbell Scientific datalogger support software, but is also accessible

with terminal emulator programs such as Windows Hyperterminal. Datalogger

keyboards and displays cannot be used.

To enter the SDI-12 transparent mode, enter Terminal Emulator from

LoggerNet, PC400 or PC200W datalogger support software. A terminal

emulator screen is displayed. Click the “Open Terminal” button. A green

“Active” indicator appears as shown in FIGURE 11.3-1. Press <Enter> until

he CR1000 responds with the prompt “CR1000>”. Type “SDI12” at the

prompt (without the quotes) and press <Enter>. In response, the query “Enter

Cx Port 1, 3, 5 or 7” will appear. Enter the control port integer to which the

SDI-12 sensor is connected. An “Entering SDI12 Terminal” response indicates

that SDI-12 Transparent Mode is active.