Omron CPM2C-S100C Operation Manual page 155

Explicit Message Communications
C200HW Master in a CS Series PC: Reading Data with IOWR
Example Network
Conditions
IOWR(––) Operand Details
[IOWR C S W]
This example shows the instruction operands and results of the IOWR com-
mand when 20 words of data are read from IR 010 to IR 029 in a Slave, and
written to response words from DM 2000 to the end in a Master mounted in a
CS-series PC.
Refer to the DeviceNet Masters Unit Operation Manual (W379) for details on
explicit messages, and refer to the SYSMAC CS/CJ Series Communications
Commands Reference Manual (W342) for details on IOWR(––).
Master's node number:
Slave's node number:
• Control Code
Word Contents
(Hex)
C 3F FE Master's node number = 3F (Hex) specifies 63
Master's unit address = FE (Hex) specifies the local Unit
• Command Words
Word Contents
(Hex)
S 82 07 Specifies starting response word = DM 2000
S+1 D0 00 82 (Hex) specifies the DM area
07D0 (Hex) specifies address 2000
(Refer to the CS Series Operation Manual (W339) for details.)
S+2 00 64 Response monitoring time = 10.0 seconds
S+3 00 0B Number of bytes of command data beginning with word S+4 =
0B (Hex) specifies 11 bytes
S+4 28 01 EXPLICIT MESSAGE SEND command code = 2801 (Hex)
S+5 02 1C Slave node number = 02 (Hex)
READ BYTE DATA command service code = 1C (Hex)
S+6 00 2F Class ID = 002F (Hex)
S+7 00 01 Instance ID = 0001 (Hex) specifies data area
S+8 0A 00 Starting read address = 000A (Hex) specifies IR 010
Address L = 0A (Hex); Address H = 00 (Hex)
S+9 28 00 Number of bytes of data to read = 28 (Hex) specifies 40 bytes
• Destination Information
Word Contents
(Hex)
W 00 00 Master Unit's unit number = 00 (Hex) specifies 0
W+1 00 10 Number of words of command data beginning with word S+0 =
10 (BCD) specifies 10 words
• Response Words (The results are stored as follows.)
Word Contents
(Hex)
DM 2000 28 01 EXPLICIT MESSAGE SEND command code = 2801 (Hex)
DM 2001 00 00 Normal completion code = 0000 (Hex)
DM 2002 00 2A Number of bytes received = 2A (Hex) indicates 42 bytes
(This is the number of bytes from D+3 to the end.)
DM 2003 02 9C Slave's node number = 02 (Hex)
READ BYTE DATA response service code = 9C (Hex)
DM 2004 HH LL These words contain the data to be read from Slave
words IR 010 to IR 029.
When the READ BYTE DATA command is executed from an
OMRON Master, the bytes are written to the Master in the
same order (HH LL) in which they appear in the Slave.
(––)
63
2
Function
Function
Function
Function
Section 6-3
133