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31
Instance Specifications
Section 2-2
Instance Name
This is the name of the instance.
• Instance names can be up to 30,000 characters long.
• Instance names cannot contain spaces or any of the following characters:
! “ # $ % & ‘ ( ) = - ~ ^ \ | ‘ @ { [ + ; * : } ] < , > . ? /
• Instance names cannot start with a number (0 to 9).
There are no other restrictions.
The instance name is displayed above the instance in the diagram.
Function Block
Instance Areas
To use a function block, the system requires memory to store the instance’s
internal variables and I/O variables. These areas are known as the function
block instance areas and the user must specify the first addresses and sizes
of these areas. The first addresses and area sizes can be specified in 1-word
units.
When the CX-Programmer compiles the function, it will output an error if there
are any instructions in the user program that access words in these areas.
Function Block Instance
Area Types
The following settings are made in the function block instance area:
Non-retained Areas
Note
(1) Except when the data type is set to TIMER or COUNTER.
CLOCK PULSE
EN
ENO
ON_TIME
OFF_TIME
Pulse_2sON_2sOFF
Instance name
&20
&10
FB Instance
Area
Default value
Applicable memory
areas
Start Address
End Address
Size
Non Retain
H512
H1407
896
CIO, WR, HR, DM, EM
Retain
H1408
H1535
128
HR, DM, EM
Timers
T3072
T4095
1024
TIM
Counters
C3072
C4095
1024
CNT
Item
Contents
Allocated variables
Variables for which the retain property for power OFF and
operation start is set as non-retained (See note 1.)
Applicable areas
H (Function block Special Holding Area), I/O (CIO Area), H
(Holding Area), W (Internal Relay Area), D (Data Memory
Area) (see note 2), E (Extended Data Memory Area) (See
notes 2 and 3.)
Setting unit
Set in words
Allocated words
(default)
H512 to H140
Содержание CS1-H Series
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