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4-45
4 Using Protocol Macros
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
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System-defined variable
User-defined variables (To be defined before or when creating a program)
* When HR, DM, or EM is specified as an allocated address (AT) for user-defined variables, set the Retention
Specification to Retained. When CIO/WR is specified, set it to No-retained.
Name
Data
type
Factory
setting
Comments Details
_Port_isAvailable BOOL --- Network Communica-
tions Instruction
Enabled Flag This flag becomes TRUE when
there are internal logic ports
available, FALSE when there is
no internal logic port available.
Name Data type Factory setting
Allocated
address
(AT)
Details
OperatingEnd BOOL False --- Process completed
Trigger BOOL False --- Execution conditions
Operating BOOL False --- Processing
InPort _sPORT UnitNo:=_CBU_No00,
PhysicPortNo:=0) --- Port setting
SendData ARRAY[0..4] OF
WORD [5(16#0)] --- Send data
RecvData ARRAY[0..3] OF
WORD [4(16#0)] %D200 (*) Receive data
TmpData DINT 0 --- Present value of
E5
@ N
RS_instance RS --- --- ---
ExecPMCR_instance ExecPMCR --- --- ---