Omron CJ1W-SCU22, Руководство по эксплуатации, Страница: 241 / 478

6-13
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
Send Data Setting
Break the character string '@READ' into individual characters and store the character codes as array
elements in SendDat[].
In other words, BYTE#16#40(@) is stored in SendDat[0] and BYTE#16#52(R) in SendDat[1]. This pro-
cessing uses the StringToAry 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
Allo-
cated
address
(AT)
Details
OperatingEnd BOOL False --- Process completed
Trigger BOOL False --- Execution conditions
Operating BOOL False --- Processing
InPort _sPORT (UnitNo:=_CBU_No0
0, PhysicPortNo:=0) --- Port specification
SendDat ARRAY[0..4] OF
BYTE [5(16#0)] --- Send data
RS_instance RS --- --- ---
SerialSend_instance SerialSend --- --- ---
Name
Data
type
Factory
setting
Allocated address
(AT)
Comments Details
Barcode_P2_NopS
erialSendExecSta BOOL --- IOBus://rack#0/slot#
0/P2_NopSta/P2_N
opSerialSendExec-
Sta Port 2:
SerialSend Execut-
ing Flag
This flag is TRUE
while execution of
the instruction is in
progress.
BYTE data type array
SendDat[0] BYTE#16#40
STRING data type StringToAry SendDat[1] BYTE#16#52
'@READ' SendDat[2] BYTE#16#45
SendDat[3] BYTE#16#41
SendDat[4] BYTE#16#44