Omron CJ1W-SCU22, Руководство по эксплуатации, Страница: 247 / 478

6-19
6 No-protocol Mode
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
6-
3 Usin
g Serial P
o
rt
I/O Ins
truct
ion
s
6
6-3-2 Instr
u
ction Ex
ecution Metho
ds
z
ST
System-defined variable
User-defined variables (To be defined before or when creating a program)
Device variables for CJ-series Unit (To be created on the I/O Map View
window after the unit configuration is created)
Program Example
//Detection of rising edge of trigger
IF ( (Trigger=TRUE) AND (LastTrigger=FALSE) AND (_Port_isAvailable=TRUE) AND (Barc
orde_P2_NopRcvCompleteSta =TRUE) AND (SerialRcv_instance.Busy=FALSE) ) THEN
OperatingStart:=TRUE;
Operating:=TRUE;
END_IF;
LastTrigger := Trigger;
//Communication parameters settings and SerialRcv instruction initialization
Name
Data
type
Factory
setting
Comments Details
_Port_isAvailable BOOL --- Network Communications
Instruction Enabled Flag This flag is TRUE when there
are internal logical ports
available, FALSE when there
is no internal logical port
available.
Name Data type Factory setting
Allo-
cated
address
(AT)
Details
Trigger BOOL False --- Execution conditions
LastTrigger BOOL False --- Trigger value of previ-
ous task period
OperatingStart BOOL False --- Start processing
Operating BOOL False --- Processing
InPort _sPORT (UnitNo:=_CBU_No0
0, PhysicPortNo:=0) --- Port specification
RecvDat ARRAY [0..12] OF
BYTE [13(16#0)] --- Receive data
RecvSize UINT 0 --- Receive data size
RecvStringDat STRING[255] '' --- Bar code (string)
Code ULINT 0 --- Bar code (integer)
SerialRcv_instance SerialRcv --- --- ---
Name
Data
type
Fac-
tory
setting
Address Comments Details
Barcode_P2_NopRc
vCompleteSta BOOL --- IOBus://rack#0/slot
#
0/P2_NopSta/P2_N
opRcvCompleteSta Port 2: Reception
Completed Flag This flag is TRUE
when the receiving
is complete.