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Appendix H: Zero & Tare
There are two functions which are similar, yet actually different: Zero &
Tare:
• The Zero function supplies both manual and automatic ways to clear
the gross weight.
• The Auto-Tare function supplies a way to define the meaning of the
setpoint parameter.
H.1 The
Zero
function
This function supplies both manual and automatic ways to clear the gross
weight:
Manual Zero
The manual zero is available only in the general mode, not in the
fill-mode. Its effect is temporary – it expires upon card reset.
The manual zero is accessible via two ways:
* Hardware input: Turn on digital input #3 for two seconds.
* Communication:
* When accessing the communication directly:
Send the ‘z’ command (section 4.1/i).
* When using the LCIC-WIM ActiveX:
Call the Apply_Temporary_Zero function (section 4.3.5).
Auto Zero
The auto zero is available only in the fill-mode, not in the
general mode. Its effect is temporary – it expires upon card reset
or upon exiting the fill-mode.
The auto zero operation occurs when some user’s pre-defined condition is
satisfied. For more details refer to section 3.3.2.2.