OPERATION AND INSTALLATION
RCI-4100 SYSTEM
MAN-1111 Rev H
©Copyright 2015 LSI-Robway Pty Ltd
Page 60
The main pieces of useful information
Obtainable from the displays are the
error codes
and
raw counts
. Error codes are discussed in
Section 8.1.1 “Problems That Produce Error Codes”. The raw count shows what the actual inputs are
doing (i.e. like a signal strength indication). These raw counts are manipulated in software according to
the calibration data stored in the controller to produce the readouts on the Display Unit. If the
calibration has been done incorrectly, or the configuration is incorrect, or something else is wrong,
then the Display Unit readouts (e.g. the LOAD or ANGLE values) may provide you with misleading
information.
YOU MUST USE THE "VIEW UNCALIBRATED...." FUNCTION CODES TO
DETERMINE THE CORRECT OPERATION OF THE EXTERNAL SENSORS, NOT THE
"CALIBRATED" VALUES
. It should be noted here that for load related problems, the
"VIEW
UNCALIBRATED TRANSDUCER"
function code must be used, and not
"VIEW CALIBRATED
LOAD"
. For correct operation these values must be in the range 50 to 4045. Anything outside of this
range will produce an error. Refer to Section 6, “Function Code Descriptions” on how to access these
raw counts.
Check the obvious
Once you have found a problem with a sensor for example, check all of the obvious things to do with
that sensor such as making sure all of the connectors are tight. Be systematic - make notes about
what you have done and what you found. You will find that under pressure you can easily forget what
you have checked and it becomes very easy to miss things.
8.1. Example Problems and Possible Causes
8.1.1.
Problems That Produce Error Codes
Error code 101:
This indicates that the signal from the angle sensor is too low or too high. This should be confirmed by
viewing the UNCALIBRATED ANGLE INPUT and noting that the value shown in the LOAD display is
less than 50, or higher than 4050.
Possible causes:
•
Angle sensor incorrectly mounted. This is especially critical for the Electronic Angle Sensor.
Refer to Section 7.4.4 “Verifying Operation of Sensors” of the manual for calibration of the
angle sensor.
•
The angle sensor signal wire is short circuited to the shield or to the angle 0V.
•
The angle sensor signal wire is shorted to the excitation positive wire.
•
The angle sensor is not connected or there is an open circuit in either the angle sensor signal
wire or the angle excitation positive wire.
•
The angle sensor excitation voltage is shorted. If this is the case it will also affect the length
and load channels.
•
The angle sensor 0V wire is open circuit.
Error code 201:
This indicates that the signal from the main load sensor is too low or too high. This should be
confirmed by viewing the UNCALIBRATED TRANSDUCER 1 INPUT and noting that the value shown
in the LOAD display is lower than 50, or higher than 4050.
Possible causes:
•
Load cell signal wires shorted together.
•
The is shorted to the shield.
•
The excitation - is shorted to the shield.
•
The excitation supply is shorted together. This will obviously affect all of the external sensors.
Measure the excitation voltage and compare it with the expected value. If this is the cause,
the UNCALIBRATED value will generally be non-zero, but below 50.
•
The load cell is disconnected or there is an open circuit in one of the signal wires.
•
The signal - is connected to the shield.
•
The and the exci are swapped.
•
The signal - and the excitation - are swapped.
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