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Section
Explicit Message Communications
6-3
CV500/CV100/CV2000/CVM1 Programmable Controllers Operation Manual:
Ladder Diagrams (W202) for CVM1 and CV-series PCs.
Example Network
Conditions
Master’s node number: 63
Slave’s network address: 1
Slave’s node number:
2
CMND(194) Operand Details
[CMND
S
D
C]
• Command Words
Word
Contents
(Hex)
S
28 01
EXPLICIT MESSAGE SEND command code = 2801 (Hex)
S+1
02 1C
Slave node number = 02 (Hex)
WRITE BYTE DATA command service code = 1E (Hex)
S+2
00 2F
Class ID = 002F (Hex)
S+3
00 01
Instance ID = 0001 (Hex) specifies data area
S+4
0A 00
Starting write address = 000A (Hex) specifies IR 010
Address L = 0A (Hex); Address H = 00 (Hex)
S+5
HH LL
These words contain the data to be written to slave words
IR 010 to IR 029. When the WRITE BYTE DATA command is
executed from an OMRON Master, the bytes are written to the
Slave in the same order (HH LL) in which they appear in the
Master.
to
S+24
:
HH LL
Function
• Response Words
(The results are stored as follows.)
Word
Contents
(Hex)
Function
D
28 01
EXPLICIT MESSAGE SEND command code = 2801 (Hex)
D+1
00 00
Normal completion code = 0000 (Hex)
D+2
00 02
Number of bytes received = 02 (Hex) indicates 2 bytes
(This is the number of bytes from D+3 to the end.)
D+3
02 9C
Slave’s node number = 02 (Hex)
WRITE BYTE DATA response service code = 9E (Hex)
• Control Words
128
Word
Contents
(Hex)
Function
C
00 32
Number of bytes of command data beginning with word S =
32 (Hex) specifies 50 bytes
C+1
00 08
Number of bytes of response data beginning with word D =
08 (Hex) specifies 8 bytes
C+2
00 01
Destination network address = 01 (Hex)
C+3
3F FE
Master’s node number = 3F (Hex) specifies 63
Master’s unit address = FE (Hex) specifies the local Unit
C+4
00 00
Response required
Transmission port number = 00 (Hex) specifies 0
Number of retries = 00 (Hex) specifies 0
C+5
00 64
Response monitoring time = 64 (Hex) specifies 10.0 seconds