OTT Pluvio 2 S - Troubleshooting and Remedies

7.5 Troubleshooting/remedy
Loss of communication through the SDI-12 or RS-485 interfaces
General (both interface types)
䊳
OTT Pluvio
2
S is connected to PC/tablet via USB cable (in this case, the
OTT Pluvio² S unit disconnects communication over the SDI-12/RS-485 inter-
faces); red LED flashing in 1 second interval, green LED permanently lit:
➝ disconnect USB cable.
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Precipitation gauge supply voltage missing, incorrectly connected, or is outside
the specified range; red LED is continuously OFF:
➝ restore power supply to the unit (replace fuse as necessary);
➝ check supply voltage level and adjust as necessary;
➝
check supply voltage wiring and correct as necessary.
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Precipitation gauge and the data recording unit connected are powered by two
isolated power sources; GNDs of the two power supplies are not connected to
each other:
➝ establish connection between the two GNDs.
SDI-12 interface
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Incorrect configurations of the OTT Pluvio² S and/or of the data recording unit
connected:
➝ check the SDI-12 sensor address of OTT Pluvio² S and correct as necessary
(using the OTT Pluvio² Operating Software);
➝ check the “Communication interface” (SDI-12) setting and correct as
necessary (using the OTT Pluvio² Operating Software);
➝ check the configuration of the data recording unit connected and correct
as necessary (refer to the data recording unit Operating Instructions).
RS-485 interface – SDI-12 protocol
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RS-485 interface wiring is incorrect (pins “Data RS-485 ...”):
➝ 2-wire: check pin assignments of “… - A”, “… - B” and swap as necessary;
➝ 4-wire: check pin assignments of “… TX - A”, “… TX- B” as well as of
“… RX - A”, “… RX - B”
and swap as necessary.
䊳
Incorrect configurations of the OTT Pluvio² S and/or of the data recording unit
connected:
➝ check the SDI-12 sensor address of OTT Pluvio² S and correct as necessary
(using the OTT Pluvio² Operating Software);
➝ check the “Communication interface” (RS-485/RS-485 4-wire) setting and
correct as necessary (using the OTT Pluvio² Operating Software);
➝ check the “RS-485 protocol type” (SDI-12 protocol) setting and correct as
necessary (using the OTT Pluvio² Operating Software);
➝ check the configuration of the data recording unit connected and correct as
necessary (refer to the data recording unit Operating Instructions).
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When an RS-485 interface converter is used – incorrect settings:
➝ check settings and correct as necessary.
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When terminal software (e.g. for testing) is used – incorrect settings:
➝ check settings and correct as necessary.
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