
18Ć15On Line Menu: Monitoring and Editing Tasks
18.2.6 Locating a Variable or I/O Address
The Locate command can be used to display the variable name
associated with an I/O address and display the I/O address
associated with a variable name. When you are locating a variable,
you have the option of finding the variable using a local I/O address
(slot,
register) or a remote I/O address (slot, drop, slave slot, register).
The information will be retrieved from the configuration file stored in
the rack. Note that if you are using interface modules to
communicate with foreign I/O, you will not be able to use this
command to display Modbus, AutoMate, or AĆB register numbers.
This command will display Modbus, AutoMate, and AĆB registers
using the equivalent Multibus addresses.
Step 1.
Select L
" for Locate from the Monitor Variable menu.
Step 2. Select V
" for V
ariable to locate the variable name.
Continue with step 3.
or
Select I" for I/O to locate the variable's I/O address. Skip
to step 5.
Step 3.
Select either L
" for Local I/O Address or R" for Remote
I/O Address.
Step 4. If you selected Local I/O Address, enter the slot, register,
and bit number (for boolean variables). If you selected
Remote I/O Address, enter the slot, drop, slave slot,
register, and bit number (for boolean variables).
The name of the variable that is assigned to the address
entered will be displayed.
If
there are no variables mapped to the specified I/O point,
then the message There is no variable mapped to this
I/O" will be displayed.
Step 5. Enter the variable name.
If the variable is a boolean mapped to an I/O point, the
local I/O address (slot, register, bit) and remote I/O
address (slot, drop, slave slot, register, bit) will be
displayed.
If the variable is an integer, double, or real mapped to an
I/O point, the local I/O address (slot, register) and remote
I/O address (slot, drop, slave slot, register) will be
displayed.
If
the
variable is not in the rack configuration, the message
V
ariable is either not found or is a L
OCAL variable" will be
displayed.
If the variable is mapped to a memory location, the
message Variable is a common memory variable. No I/O
address is available" will be displayed.
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