DATA LOGGING DESCRIPTION
MAN-1111 Rev H
©Copyright 2015 LSI-Robway Pty Ltd
Page 116
A summary of the logging percentage Function Codes is displayed in the following table:
Function Code Name
Description
Default Setting
Low Load Lift counter
swl percentage to record
20.0%
Medium Load Lift counter
swl percentage to record
40.0%
High Load Lift counter
swl percentage to record
65.0%
Logging Percentage
swl percentage to log
90.0%
These default settings would give rise to the following logging operation:
Low Load Lift Counter: counts the number of lifts which produce a SWL % which is greater than or equal to
20% but less than 40%.
Medium Load Lift Counter:
counts the number of lifts which produce a SWL % which is greater than or
equal to 40% but less than 65%.
High Load Lift Counter:
counts the number of lifts which produce a SWL % which is greater than or
equal to 65% but less than 90%.
Logger Records full data log of any lift which produces a SWL % which is greater than or equal to 90%
Setting Up the Data Logger
Data logging will occur at all times the display is operational. This includes the cases when, the over-ride is
activated, the display is reporting an error and during the initial calibration of the system.
For the logger to operate properly the display must be fully and correctly calibrated. This includes date and
time being set correctly. However, since the logger was recording during calibration it may be desirable to
erase the logger contents after completing the angle and load calibrations on the RCI-4100 since the logger
would have recorded some invalid information during the calibration of the sensors.
To erase the data logger contents, simply activate the appropriate Function Code once calibration is
complete (refer
Erasing Data Logger Information
).
The operator can access three more Function Codes which control how the actual logging of loads operates.
These three Function Codes are summarised in the following table
Stable Load Time
time during which load must stay stable in order to log
Stable Load Variation
load must stay within this variation to be considered stable
Reset Time
load must stay below the Low Load Counter threshold for this time
before the log cycle ends
The first two Function codes in the table are used for definition of a stable load. When a load is hoisted it is
probable that the initial load reading will be greater than the actual load on the hook because of the
"snatching effect." The stable load is recorded only when these dynamic factors have died down and the
load can be considered to be hanging from the hook in a relatively motion free position.
The "Stable load time" and "Stable load variation" Function codes can be used to adjust the load recording to
minimise the effect of dynamic factors. The load will be considered stable if the load reading does not
change by more than the "Stable load variation" setting (which is normally 0.5t by default) for a period of time
set by "Stable load time" (which is normally 2 seconds by default).
The third Function code, "Reset time," is used for terminating a log cycle. When the load causes a SWL %
which is less than the logging values (specifically the Low Load Lift counter percentage), then it is assumed
that the driver must be putting the load down again. In order to ensure that a single load is not logged
multiple times because the SWL % was hovering around the logging threshold, a log cycle will not complete
until the load SWL % remains below the threshold for a certain period of time, namely of course the "Reset
time" (by default the reset time is normally 5 seconds).
Log Cycle Description
Three types of log cycles are possible:
•
Load is lifted inside load chart boundaries (valid SWL is seen at all times)
•
SWL drops to 0 indicating the load chart has been exceeded, sensor error has occurred or slew error
has occurred.
•
Over-ride key switch is operated.
Summary of Contents for RCI-4100
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