User`s guide

Index Addressing
Mitsubishi Electric, MA00759F 211
16 Index Addressing
With index addressing, it is possible for the operator to select from which register an
object is to collect the shown value. Without index addressing an object is always
connected to the same register, and only the value in this register can be shown in the
object. Index addressing is set up by adding the value in the index register to the ad-
dress of the register which is the analog signal in the object. In general this can be
formulated as:
Display value = the content in Register (the Object’s address+the content in the Index
register)
If the content in the index register is 2 and the address of the register specified in the
object is 100, the value shown in the object will be collected from address 102. If the
value in the index register is changed to 3, the value in the object will be collected
from address 103 instead.
Which register is to be used as the index register is defined in Index under the Setup
folder in the Project Manager. Up to eight different index registers can be used in
each project, and each index register can be used for more than one object.
The objects used in the project will specify whether index registering is to be used,
and if so, which index register. This is done by selecting in the dialog for the object
I1 to I8 in the box to the right of the indicated address signal for the object. In the
example below, D10 is the analog signal and I1 is the index register used.
In the following example, three motors are to be controlled from one block. The
torque and speed for the three motors are stored in six different registers. One of the
motors will be selected in one block, and then only the current torque and speed for
this motor will be shown in the block. If another motor is selected, the current torque
and speed will be shown for this motor instead. This is possible with index
registering.