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.
䊳
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.
䊳
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
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” (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
䊳
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).
䊳
When an RS-485 interface converter is used – incorrect settings:
➝
check settings and correct as necessary.
䊳
When terminal software (e.g. for testing) is used – incorrect settings:
➝
check settings and correct as necessary.
38
