Campbell Scientific CR850 CR800 and CR850 Measurement and Control Systems - Page 174
SDI-12 Transparent Mode
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Section 7. Installation • Programmed mode automates much of the SDI-12 protocol and provides for data recording. 7.8.3.1 SDI-12 Transparent Mode System operators can manually interrogate and enter settings in probes using transparent mode. Transparent mode is useful in troubleshooting SDI-12 systems because it allows direct communication with probes. Transparent mode may need to wait for commands issued by the programmed mode to finish before sending responses. While in transparent mode, CR800 programs may not execute. CR800 security may need to be unlocked before transparent mode can be activated. Transparent mode is entered while the PC is in telecommunications with the CR800 through a terminal emulator program. It is easily accessed through Campbell Scientific datalogger support software (p. 76), but may also be accessible with terminal emulator programs such as Windows Hyperterminal. Keyboard displays cannot be used. To enter the SDI-12 transparent mode, enter the datalogger support software terminal emulator as shown in figure Entering SDI-12 Transparent Mode (p. 174). Press Enter until the CR800 responds with the prompt CR800>. Type SDI12 at the prompt and press Enter. In response, the query Enter Cx Port 1 or 3 will appear. Enter the control port integer, that is 1 to 4, to which the SDI-12 sensor is connected. An Entering SDI12 Terminal response indicates that SDI-12 transparent mode is active and ready to transmit SDI-12 commands and display responses. Figure 57: Entering SDI-12 transparent mode 174
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