User`s manual

Western Reserve Controls 1782-JDM User’s Manual
PUB 24.0
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command and number of register data desired. The command response from the ModBus device is
returned from the JDM to the DeviceNet master in response to a poll command.
The DeviceNet response data includes a record number byte and a status byte, which contains a “waiting”
bit. The DeviceNet response will be valid when both the record number matches the one sent in the Poll
Command and the waiting bit (bit 7) is reset to zero (0).
1.4.2 Explicit Messages
As mentioned explicit messages are typically used to read and write configuration data. See the
DeviceNet Specification for further information of the standard data available.
1.5 Default Device Configuration
The JDM DeviceNet address is read from the switches and is set to 63 at the factory. All other parameters
are software settable. The default settings for the JDM are provided in Section 4.
1.6 EDS
An EDS (Electronic Data Sheet), which describes the various parameters of the JDM, is shipped with your
device or is available on WRC’s web site: http://www.wrcakron.com/