Omron CJ1W-SCU22, Руководство по эксплуатации, Страница: 402 / 478

A Standard System Protocol
R-68
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
* Sequences No. 361 and No. 364 (Continuous Data Read with Interrupt) are not supported by the CS1W-SCU @@ (-V1) and
CJ1W-SCU @@ (-V1) Serial Communications Units. A protocol syntax error will occur if an attempt is made to execute either
sequence with the Serial Communications Unit.
Note The hexadecimal equivalents of sequences numbers are given in parentheses.
Ladder Interface Settings
YES:
User settings are required for the 3rd and 4th operands of PMCR(260).
NO: Send word allocation: Set the constant 0000 for the 3rd operand (S).
Receive word allocation: Set the constant 0000 for the 4th operand (D).
This sequence instructs the Bar Code Reader to start reading.
Send Data Word Allocation 3rd Operand of PMCR(260))
None.
Receive Data Word Allocation (4th Operand of PMCR(260))
None.
This sequence instructs the Bar Code Reader to stop reading.
Send Data Word Allocation (3rd Operand of PMCR(260))
None.
Receive Data Word Allocation (4th Operand of PMCR(260))
None.
364 (016C) Continuous data read
(interrupt) (V520) (*) Performing the following operations repeat-
edly: starts reading, receives data read by
the Reader, saves the data to the receive
words by the interrupt method (interrupt
No.100). No Yes
365 (016D) General-purpose com-
mand 1 Used to send data of a specified data
length, and receive only ACK as the receive
data. Yes No
366 (016E) General-purpose com-
mand 2 Used to send data of a specified data
length, and receive ACK together with the
return of other receive data. The frame for-
mat of the receive data, however, has to
contain STX and ETX. Yes Yes
BCR Read Start (Sequence No. 350 (Hex 015E))
BCR Read Stop (Sequence No. 351 (Hex 015F))
Sequence
No.
Communications
sequence name
Function Ladder interface
Send word
allocation
Receive word
allocation