Omron SYSMAC CJ1W-SCU21-V1, Руководство по эксплуатации

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Appendix A
Introduction
Appendices B the N provide information on the standard system protocols provided with the CX-Protocol, the
Serial Communications Boards, and the Serial Communications Units. Refer to
5-4 Using Protocol Macros for
details on using PMCR(260).
Using Standard System Protocols
Standard system protocols can be executed merely by specifying the sequences number to be executed in the
second operand of PMCR(260) and settings the data described in the appendices in the proper format starting
at the word specified with the third operand of PMCR(260). The data received as a response to executing the
sequence will be automatically stored starting at the word specified with the fourth operand of PMCR(260).
Procedure
1,2,3... 1. Set the sequence number as a hexadecimal value in the second operand of PMCR(260).
2. Specify the address of the first word containing the data required for the sequence as the third
operand (S: First word of send data) of PMCR(260).
3. Specify the address of the first word where respond data is to be stored as the fourth operand
(D: First receive data storage word) of PMCR(260). Unless there is a reason to specify other-
wise, set 0000 Hex in D at the initial value.
Example
The following data would be used to execute sequence number 600 in the CompoWay/F Master Protocol for a
transmission with ASCII conversion.
S: Send Data Word Allocation (3rd Operand)
Offset Contents (data format) Data
S+0 Number of send data words
(4 digits Hex) 0005 to 00FA Hex (5 to 250 decimal)
S+1 (Undefined) Node No. (2 digits
BCD) 00 to 99
S+2 MRC
(2 digits Hex)
SRC (2 digits Hex) Set the command code for the required ser-
vice
S+3 Number of send bytes (4 digits Hex) Number of data bytes from the next byte
after the command code until the byte just
before the ETX. 0000 to 0492
S+4
on Send data (4-digit Hex) The data specified in hexadecimal here will
be converted to ASCII and the number of
bytes specified in S+3 will be sent.
PMCR(260)
#0258
S
D
Communications sequence number 600 (0258 Hex)
Send data
First word of
send data Number of send data words
+0
+1
+2
+3
+4
(Undefined)
Node number
(Undefined)
SRC
Number of send bytes