Tare & Zero

Applying Tare and Zero accomplish the same aim: to start a weighing session with a value of zero.

The Tare value may include, for example, the container of the material to be weighed.

If the scale does not read 0 when empty, use Zero to compensate.

When Tare is applied, it is reflected in the net weight.

When Zero is applied, only the gross weight will be zero at the beginning of a weighing session.

Tare & Zero

Acquire Tare/Zero: Value read from Loadcell, Command #9224

Acquire Tare: In this method, the tare value is acquired from the scale. The objects comprising the tare, such as a pallet or materials container, are placed on the scale, and Acquire Tare is activated.

Acquire Zero: The scale must be empty to acquire Zero. Acquire Zero is not related to the Auto-Zero Tracking function, which enables the module to compensate for the accumulation of undesired material on the scale in the course of operations.

Note ♦	Loadcell Name determines from which loadcell the tare/zero will be acquired. After the tare has been acquired, the tare value will be applied to that loadcell.
♦	Use the Save Command to save Tare and Zero values to the module's EEPROM memory.
♦	Tare and Zero cannot be acquired when running uV/V mode.
♦	If the Motion Band is activated, the tare value cannot be acquired until the scale is stable.

Acquire Tare/Zero use the same command number; the difference is the value stored into parameter SI 141.

Command parameters

SI 141

Determines the number and location of the Loadcell to be tared.

Acquire Tare

LC #	DIN Location
0-2	Always 0	0-7

Storing the value 103 into SI 141 and 9224 into SI 140 acquires the Tare value from Loadcell 2 on the 4th module on the DIN rail.

Acquire Zero

Zero	LC #	DIN Location
1	0-2	Always 0	0-7

Storing the value 1202 into SI 141 and 9224 zeros Loadcell 3 on the 3rd module on the DIN rail.

SI 142

MI address; this MI will contain the Command Status indication

SI 140

Command number: 9224

Advanced Tare& Zero Functions

Edit Tare/Zero: value via operand or constant, Command #8456

Enables the tare or zero value to be acquired from a register or constant value within the controller. You use Edit Tare/Zero to change a specific loadcell's existing tare/zero value.

Edit Tare/Zero use the same command number; the difference is the value stored into parameter SI 141.

Command parameters

SI 141

Determines the number and location of the loadcell.

Edit Tare

LC #	DIN Location
0-2	Always 0	0-7

Edit Zero

Zero	LC #	DIN Location
1	0-2	Always 0	0-7

Storing the value 1202 into SI 141 and 9224 edits Loadcell 3 on the 3rd module on the DIN rail.

SI 142

MI address; this MI will contain the Command Status indication

SI 143

SI 144 and SI 145 provide either the values, or the location of the MIs containing the values that are used to edit the values.

If the value of SI 143 is:	Result
4	The Tare/Zero value will be taken directly from SI 144.
5	(High Resolution) the Tare/Zero value will be taken directly from SI 144 and SI 145.
10	The value in SI 144 provides the address of an MI that provides the Tare/Zero value.
20	(High Resolution) The value in SI 144 provides the start address of an MI vector that is 2 MIs long; providing 2 values for the Tare/Zero Value.

SI 140

Command number:8456

Read Tare/Zero: reading the current Tare or Zero Value, Command #8712

Copies the current tare or zero value applied to the specified loadcell input into the linked PLC register.

Read Tare/Zero use the same command number; the difference is the value stored into parameter SI 141.

Command parameters

SI 141

Determines the number and location of the loadcell to be read.

Read Tare.

LC #	DIN Location
0-2	Always 0	0-7

Storing the value 202 into SI 141 and 9224 copies the tare value from Loadcell 3 on the 3rd module on the DIN rail.

Read Zero

Zero	LC #	DIN Location
1	0-2	Always 0	0-7

Storing the value 1202 into SI 141 and 9224 copies the zero value from Loadcell 3 on the 3rd module on the DIN rail.

SI 142

MI address; this MI will contain the Command Status indication

SI 143

SI 144 and SI 145 provide the location of the MIs to which the containing the values that are used to edit the values.

If the value of SI 143 is:	Result
10	The value in SI 144 provides the address of an MI that will hold the Tare/Zero value.
20	(High Resolution) The value in SI 144 provides the start address of an MI vector that is 2 MIs long; providing 2 values to hold the Tare/Zero Value.

SI 140

Command number:8712

Tare & Zero

Tare & Zero

Acquire Tare/Zero: Value read from Loadcell, Command #9224

Advanced Tare& Zero Functions

Edit Tare/Zero: value via operand or constant, Command #8456

Read Tare/Zero: reading the current Tare or Zero Value, Command #8712

Related topics