Omron CS1W-SLK11-21 - 06-2004, Manual

Page: 126 / 202

109
FINS Command/Response Format Section 6-3
3. FINS commands support network relay operations, so they can pass
through a network hierarchy to access devices on up to three network lev-
els (including the local network).
Types of FINS Commands There are basically two kinds of FINS commands: Those addressed to CPU
Units and those addressed to CS-series CPU Bus Units. Among FINS com-
mands for CPU Units, there are commands addressed to the various models
of CPU Unit, such as the CS-series CPU Units, CV-series CPU Units,
C200HX/HG/HE CPU Units, and so on. The basic code system is the same,
but the detailed specifications vary according to the CPU Unit.
Among FINS commands for CS-series CPU Bus Units, there are commands
addressed to SYSMAC LINK Units, to the Controller Link Unit, and so on.
6-3-2 Command/Response Parameters
All parameters used in commands and responses are in hexadecimal, unless
otherwise specified.
6-3-3 Communications Data Format
Command Format Commands have the following format. This data must be stored beginning at
first command word specified as an operand (S) of the CMND(490) instruc-
tion.
Response Format Responses have the following format and are stored beginning at the first
response word specified as an operand (D) of the CMND(490) instruction.
Network 1
Network 2
Network 3
Command
code
Data
540 bytes max. 2 bytes
Response
code
Command
code
01 01
Data
538 bytes max. 2 bytes 2 bytes