Controller Link Units Operation Manual

7
Overview Section 1-1
SEND/RECV The SEND or RECV instruction sends or receives data in an area of a particu-
lar node.
The SEND instruction sends data from an area of the local node and writes to
an area in the designated node.
The RECV instruction requests the designated node to send area data and
writes the data to the local node.
CMND The CMND instruction issues a command to read or write data of other nodes,
control, or read error logs. With the Controller LInk Unit, OMRON’s command
protocol called “FINS commands” is used.
Note Since the C200HX/HG/HE PLCs do not support the CMND instructions, arbi-
trary commands cannot be issued.
RAS
RAS performs real-time monitoring of the network status. If an error occurs in
the network, RAS records and displays the time and contents of the error.
Status Area Data Link Status Area
When the data link function is used, the data link status is reflected in the data
link status area of the PLC.
Network Status Area Other than the Data Link:
The network status such as the state of node participation is reflected in the
status area of the PLC.
Error Log The error log function records contents (codes) and times of errors that occur
in the network into the RAM or EEPROM, up to the maximum of 39 errors.
The recorded errors can be read using the Controller Link Support Software
or the message service function.
Controller Link Unit
CPU Unit
Status Area
• Data link status
• Status other than the data lin
k
CPU Unit
Controller Link Unit
Controller Link UnitController Link Unit Controller Link UnitController Link Unit
CS-series
CPU Unit
Error log table
C200HX/HG/
HE CPU Unit
CVM1, CV-
series CPU
Unit
CJ-series
CPU Unit