RS-485 interface – ASCII 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 “… 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 “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” (ASCII text …) setting and correct as
necessary; make sure that Baud rate is correct; 1200 … 57,600 Bd (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).
Loss of communication through the USB interface
䊳
Connection between OTT Pluvio
2
S and PC/tablet via USB cable failed;
red LED is flashing in 1 second interval, green LED is OFF:
➝ check connection via USB cable and correct as necessary.
䊳
USB interface driver on PC/tablet is not or incorrectly installed:
➝ (re)install USB interface driver.
No or incorrect pulses available at the pulse outputs
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
Supply voltage* for external circuitry connected to the pulse output is missing,
incorrectly connected, or limits for U
max
and I
max
are exceeded:
➝ power external circuitry*;
➝ check wiring of the pulse outputs and correct as necessary;
➝ check external circuitry and correct as necessary, so that the limits for
U
max
and I
max
are kept.
* not required for OTT dataloggers
䊳
Incorrect configurations of the OTT Pluvio² S and/or of the data recording
unit connected:
➝ check the “Pulse output frequency” setting and correct as necessary
(using the OTT Pluvio² Operating Software);
➝ check the “Pulse factor” 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).
Note: The “Pulse status information” output continuously provides pulses (alive
signal) when the unit is operating properly. Depending on collecting bucket level,
10 … 100 pulses per minute are output or, when the OTT Pluvio
2
S unit is connected
to a PC/tablet via USB cable, 120 pulses per minute are output.
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