Omron CX-PROGRAMMER 5.0-FUNCTION BLOCK OPERATION Operation Manual page 42

Function Block Specifications
Variable Properties
Data type
BOOL Bit data
INT Integer
UNIT Unsigned integer
DINT Double integer
UDINT Unsigned double integer
LINT Long (4-word) integer
ULINT Unsigned long (4-word) integer
WORD 16-bit data
DWORD 32-bit data
LWORD 64-bit data
REAL Real number
LREAL Long real number
TIMER Timer (See note 1.)
COUNTER Counter (See note 2.)
• For details on system-defined variables, refer to Appendix C External
Variables.
• To reference user-defined variables in the global symbol table, the vari-
ables must be registered in the global symbol table using the same vari-
able name and data type as the external variable.
Variable Name
The variable name is used to identify the variable in the function block. The
name can be up to 30,000 characters long. The same name can be used in
other function blocks.
Note A variable name must be input for variables, even ones with AT settings (spec-
ified address).
Data Type
Any of the following types may be used.
Content
Note (1) The TIMER data type is used to enter variables for timer numbers (0 to
4095) in the operands for TIMER instructions (TIM, TIMH, etc.). When
this variable is used in another instruction, the Timer Completion Flag (1
bit) or the timer present value (16 bits) is specified (depending on the in-
struction operand). The TIMER data type cannot be used in structured
text function blocks.
(2) The COUNTER data type is used to enter variables for counter numbers
(0 to 4095) in the operands for COUNTER instructions (CNT, CNTR,
etc.). When this variable is used in another instruction, the Counter Com-
pletion Flag (1 bit) or the counter present value (16 bits) is specified (de-
pending on the instruction operand). The COUNTER data type cannot be
used in structured text function blocks.
AT Settings (Allocation to Actual Addresses)
With internal variables, it is possible to set the variable to a particular I/O
memory address rather than having it allocated automatically by the system.
To specify a particular address, the user can input the desired I/O memory
address in this property. It is still necessary to use variable name in program-
ming even if a particular address is specified.
Note (1) The AT property can be set for internal variables only.
Size Inputs
1 bit OK
16 bits OK
16 bits OK
32 bits OK
32 bits OK
64 bits OK
64 bits OK
16 bits OK
32 bits OK
64 bits OK
32 bits OK
64 bits OK
Flag: 1 bit Not supported Not supported OK
PV: 16 bits
Flag: 1 bit Not supported Not supported OK
PV: 16 bits
Section 2-1
Outputs Internals
OK OK
OK OK
OK OK
OK OK
OK OK
OK OK
OK OK
OK OK
OK OK
OK OK
OK OK
OK OK
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