Omron CS1W-SLK11-21 - 06-2004, Руководство пользователя

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FINS Command/Response Format Section 6-3
6-3 FINS Command/Response Format
This section describes the format of the commands and responses used with
the CMND(490) instruction via a CV-series SYSMAC LINK Unit. SYSMAC
LINK Units support only FINS commands.
Unless another format is specifically indicated, all commands and responses
are in hexadecimal. Commands that are sent to a PLC CPU differ from those
that are sent to a SYSMAC LINK Unit.
Although SYSMAC CS-series PLCs support both C-mode and FINS com-
mands, CS-series SYSMAC LINK Units do not support C-mode commands,
which are used for data exchanges with SYSMAC C-series PLCs.
6-3-1 FINS Commands
FINS commands form a command system for message services across differ-
ent OMRON networks. They can be used for various control operations, such
as sending and receiving data, changing operating modes, executing forced
set and forced reset operations, performing file operations, and so on. FINS
commands make it possible to freely communicate with Units in various net-
works and on CPU Racks by simply specifying the network, node, and unit.
FINS commands have the following features:
1,2,3... 1. They are defined in the application level and do not depend on lower levels
(i.e., the physical and data link levels). This allows them to be used across
a variety of networks and CPU buses. Specifically, they can be used with
SYSMAC LINK, Controller Link, and Host Link networks, and between
CPU Units and CS-series CPU Bus Units.
Note FINS commands are sent with UDP/IP headers when using Ethernet
and with Host Link command headers when using Host Link.
2. FINS commands can be used to access various kinds of devices besides
CPU Units. Devices such as CPU Units, CS-series CPU Bus Units, per-
sonal computers (boards), and Inner Boards can be identified and speci-
fied by their unit addresses.
Reception processing (response) 256
×
0.0045 + 4 = 5.152 ms
Max. transmission delay CPU Unit cycle time (source
node)
×
2 + CPU Unit cycle time
(destination node) + 33.844 ms
Delay cause Maximum delay (ms)
CS-series CPU Bus Unit
Inner Board
CPU Unit
Personal computer board