Section 2: Function Block Description
NAME FUNCTION
Read_Wt_status Provides weight and status reading from Plug In Module (PIM)
Zero Sets Gross weight reading to zero
Tare Sets Net weight reading to zero
Cal_Low Sets low calibration point
Cal_High Sets high calibration point
Set_Config Writes configuration parameters to PIM
Read_Configuration Read configuration parameters from PIM
Save Saves configuration parameters to non-volatile memory
Set_Sensitivity_Filter Sets gain and condition of filter in PIM
Set_defaults Sets PIM back to default settings
Get_Cmd_Status Read status of previous command
Get_Version Reads PIM firmware version information
Read_Wt_status: This block will read the weight, both gross and net,
and the status of the module.
This would be used constantly to update the weight reading and the status of the module.
The motion status indicates if the weight reading is stable.
Zero: Function block used to zero the gross weight. Using this function block will force the gross weight
to a zero value if the weight does not return to zero (for example when residual material is left in a
vessel).
Tare: Function to zero the Net weight. Using this function block will cause the net weight to go to a
value of zero. Typically used to eliminate the weight of containers or other material on the scale so that
only the weight of the material is shown.
Cal_Low: Calibration low Command. This will set the low point in a two point calibration process. This
would be used to normally set the low point at zero of a new calibration on the scale. This will use the
Cal Low Weight as the reference for this low point and must match the amount of live load weight on
the scale.
Cal_High: Calibration High Command. This will set the high point in a two point calibration. This would
be used to set the high point of a new calibration. This will use the Span setting as the reference and
must match the amount of live load weight placed on the scale for this command.
Set_Config: This will write the configuration parameters to the module. These parameters are:
NumAverages - the number of readings taken an averaged together to report as the weight;
Motion Tolerance - sets the amount of weight change over a one second period that determines
the “stability” of the weight reading. A Motion indication means the weight is changing on the
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