Omron DeviceNet CV Series Operation Manual page 340

Using Another Company's Master Unit
This appendix explains how to operate an OMRON Slave when the Slave is connected to a Master manufac-
tured by another company.
Use Poll Connection with Output Slaves
If the Slave has outputs, do not communicate with the Master through a bit strobe connection.
There are several DeviceNet I/O communications methods, including poll and bit strobe connections, but
DeviceNet specifications allow the bit strobe connection with inputs only. OMRON Master Units conform to
these specifications and communicate with Output Slaves through a poll connection, but some other com-
pany's Masters allow bit strobe connections with Output Slaves. Before connecting an OMRON Slave to
another company's Master, verify the Master's connection specifications.
About EDS Files
When connecting an OMRON Slave to another company's Master, it may be necessary to install the OMRON
Slave's EDS file in the other company's configurator to set the Slave's information in the Master. With some
companies' Masters, the Slaves can be connected without making settings.
With some other companies' configurators, installing the OMRON Slave's EDS file in the configurator will allow
you to make various parameter settings from the configurator.
If you can't obtain a copy of the EDS file or the other company's configurator does not support EDS files, it will
be necessary to directly input settings such as the connection type and data size.
Installing an EDS File
EDS files are provided by the manufacturer for each Slave and contain settings such as the Slave's ID and I/O
data sizes. If the EDS file is installed in the configurator, the Slave's settings can be changed and the I/O size
will be input automatically when the Master's scan list is created.
EDS files for the Slaves described in this manual can be downloaded from the product catalog at the following
website:
http://www.odva.astem.or.jp
Locate the EDS file for the desired Slave and install that EDS file in the configurator. Installation procedures
vary; refer to the configurator's manuals for details on the installation procedure.
Inputting Settings Directly
If you can't obtain a copy of the EDS file or the other company's configurator does not support EDS files, it will
be necessary to directly input settings such as the connection type and data size. (Always select the connec-
tion type that is supported by the Slave.)
The following connection types are allowed in DeviceNet communications.
Connection type
poll Data is exchanged in individual command/
response transmissions from the Master to each
Slave. The output data is transferred in commands
and the input data is received in responses.
bit strobe The Master broadcasts a command and multiple
Slaves return input data in their responses.
change of state Data is transmitted when the data has changed in
(COS) the Master or Slave.
cyclic The Master and Slaves transmit input/output data
cyclically (at fixed intervals).
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Appendix B
Operation Remarks
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The command is sent just once, so the cycle time
is short, however this method supports a maxi-
mum of 8 bytes of input data from Slaves.
Data is transmitted only when there has been a
change. Devices that do not need to communi-
cate will not communicate, so the network usage
is more efficient.
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