YASKAWA VIPA System 300S+ Manual page 11

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VIPA System 300S
Process image and
periphery
Bit Memory
Timers and counters
Data Blocks
HB140 | CPU | 317-4PN23 | en | 18-01
The user application can quickly access the process image of the inputs and outputs PIO/
PII. You may manipulate the following types of data:
n individual Bits
Bytes
n
Words
n
n Double words
You may also gain direct access to peripheral modules via the bus from user application.
The following types of data are available:
n Bytes
n Words
n Blocks
The bit memory is an area of memory that is accessible by means of certain operations.
Bit memory is intended to store frequently used working data.
You may access the following types of data:
n individual Bits
n Bytes
n Words
n Double words
In your program you may load cells of the timer with a value between 10ms and 9990s.
As soon as the user application executes a start-operation, the value of this timer is
decremented by the interval that you have specified until it reaches zero.
You may load counter cells with an initial value (max. 999) and increment or decrement
these when required.
A data block contains constants or variables in the form of bytes, words or double words.
You may always access the current data block by means of operands.
You may access the following types of data:
individual Bits
n
Bytes
n
n Words
n Double words
Operating structure of a CPU > Operands
Basics
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