AF (Analogue Flag)
Flags are used when xLogic works in a communication
system. AF is an analogue flag which is used to save
/transfer analogue values (data format is Signed short)
between the master and slave devices. Up to 32 (PR-6)
and 256 (PR-12/PR-18/PR-24) for xLogic CPU can be
used when programming. In your block configuration,
you can assign a new number to the analogue flag,
provided this flag number does not already exist in your
circuit program.
The output always carries the signal of the previous
program cycle. This value does not change if the
communication were to fail.
NOTICE:
1. The address of “AF“ can be found in the
Modbus communication protocol file.
2. Keep the input pin of AF NULL (do not
connect with other blocks) if you want to use the Write
property.
You can set a start value for the AF1—AF64 (PR-12/PR-
18/PR-24), and the value does not get lost if the power
was a failure, so you can use such AF in your program
as a number input from the touchscreen or the panel
key of the CPU.
NOTICE:
1. AF65--AF256 does not support a Start Value
function, and the values of AF65 to AF256 will be lost
if the power fails.
2. If you enable the "start value option" of AF,
then you are not allowed to connect any other
function to the input leg of the AF.
3. If you connect the input leg of the AF block
to other function blocks, the "start value" will not be
available anymore.
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