AVG Automation 6" EZTouch I/O Flex, Руководство пользователя, Страница: 39 / 64

EZTouch I/O Flex
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CPU Memory
Memory Types
A PLC system handles many numbers representing different types of information
regarding processes/machine parameters. These processes/machine parameters
may be anything from status of the input or output devices, timers/counters, or
other data values. Before you start programming the
EZTouch I/O Flex
, it would
be helpful if you took a moment to familiarize yourself with how the
system represents and stores the various types of data. Each PLC manufacturer has
their own conventions for this process in their PLCs.
The Mapping Conventions section outlines the specific memory types used in
the
EZTouch I/O Flex
in greater detail. The memory types can be used to store
a variety of information and can be used within various RLL instructions. See a
description of each of the memory types below:
o
Discrete Memory Type
A discrete memory type is one bit that can be either a 1 or a 0 (On or Off).
Discrete memory area is used for inputs, outputs, control relays, and
timer/counter bits.
o
Word Memory Type
A word memory type is a 16-bit location that is normally used to store
and manipulate numeric or ASCII data. A word memory location is also
called a Register.
The following table displays all the Register/Discrete types supported by the
EZTouch I/O Flex
along with their address range, syntax, etc.
EZTouch I/O Flex
Memory Map
SYNTAX: TAAAA
T - TYPE
AAAA - Address of Memory Type in Decimal
MEMORY TYPE
ADDRESS
RANGE
I/O TYPE VALUE TYPE
SYNTAX
EXAMPLES
DISCRETES / REGISTERS
RETAINED ON POWER CYCLE
I- Discrete Inputs 1-128 READ_ONLY DISCRETE I5 NONE
O- Discrete Outputs 1-128 READ_WRITE DISCRETE O6 O1- O128
S- Discrete Internals 1-1024 READ_WRITE DISCRETE S4 S1- S1024
IR- Input Register 1-64 READ_ONLY WORD 1R3 NONE
OR- Output Register 1-64 READ_WRITE WORD OR2 OR1 - OR64
R- Register Internals 1-8192 READ_WRITE WORD R100 R1
– R
8192
SR- System Registers 1-64 READ_WRITE WORD SR1 SR1
–SR
64
SD- System Discretes 1-64 READ_WRITE DISCRETE SD10 SD1
–SD
64
XR- Index Registers 1-4 READ_WRITE WORD XR10 NONE
#
R – Value Registers
1-4 READ_WRITE WORD #R6 #R1 - #R4
Note: Does not Support Access to a Bit of Word (E.g.: R100/ 0, R100/5
…etc
)