Omron CJ1W-SCU22, Руководство по эксплуатации, Страница: 245 / 478

6-17
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
The default settings are Baud Rate: 9,600 bps, Start Bits: 1 bit, Data Length: 7 bits, Parity: Even parity
and Stop Bits: 2 bits.
z
Processing of receive data
The data stored in RecvDat[] is a bit string consisting of character codes that correspond to the individ-
ual character values of the bar code. One array element of RecvDat[] corresponds to one bar code
character. First, the characters are converted to the character string RecvStringDat by using the Ary-
ToString instruction. Next, RecvStringDat is converted to the ULINT integer code by using the
STRING_TO_ULINT instruction.
z
LD
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)
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
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 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)
RS_instance RS --- --- ---
SerialRcv_instance SerialRcv --- --- ---
Name
Data
type
Fac-
tory
setting
Allocated address
(AT)
Comments Details
Barcode_P2_Nop
RcvCompleteSta 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.
BYTE data type array
STRING data type ULINT type
RecvDat[0] BYTE#16#34 AryToString RecvStringDat STRING_TO_ULINT Code
RecvDat[1] BYTE#16#39 '4901 ' ULINT#4901
RecvDat[2] BYTE#16#30
RecvDat[3] BYTE#16#31