Omron CP1L CPU UNIT - 03-2009, Operation Manual

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Serial Communications Section 6-3
CPU Unit Serial Gateway Function Specifications
Note If a CJ-series Serial Communications Unit is connected via a CJ Unit Adapter,
messages can also be converted to Modbus-ASCII or Host Link FINS. Refer
to the
SYSMAC CS/CJ Series Serial Communications Boards/Units Opera-
tion Manual (W336) for details.
6-3-5 Serial PLC Links
Overview
Serial PLC Links can be used to allow data to be exchanged among CP1L
and CJ1M CPU Units via the RS-422A/485 or RS-232C Option Boards
mounted to the CPU Units without requiring special programming. The com-
munications mode in the PLC Setup must be set to the Serial PLC Link Mode
to enable this functionality.
• Either serial port 1 or 2 can be used. (See note.)
• Words are allocated in memory in the Serial PLC Link Words (CIO 3100
to CIO 3199).
• A maximum of 10 words can be transferred by each CP1L CPU Unit, but
the number of linked words can be set to fewer words. (The size must be
the same for all CP1L CPU Units.)
Note Serial PLC Links cannot be used on serial ports 1 and 2 at the same time. If
one port is set as a Serial PLC Link slave or master, it will not be possible to
set the other port for a Serial PLC Link. A PLC Setup error will occur if an
attempt is made to set both ports for Serial PLC Links.
Item Specification
Pre-conversion data FINS (via FINS network, Host Link FINS, toolbus, NT Link,
or CPU bus)
Conversion functions FINS commands addressed to serial port 1 or 2 on the CPU
Unit are converted to CompoWay/F commands (after
removing the header) if the FINS command code is 2803
hex and to Modbus-RTU commands (after removing the
header) if the FINS command code is 2804 hex.
Post-conversion data CompoWay/F command or Modbus-RTU command
Serial communications
method 1:N half-duplex
Maximum number of
nodes 31
Enabling serial commu-
nications mode Serial Gateway Mode
Response timeout The time from when a message converted to a different pro-
tocol is set until a response is received is monitored by the
serial gateway function.
Default: 5 s, User setting: 0.1 to 25.5 s
Note A FINS response code of 0205 hex (response time-
out) is sent to the source of the FINS command if a
timeout occurs.
Send delay function None