715-0025 v 1.04 CCB # 33
5136-DNS-200X DeviceNet Slave Adapter User’s Guide
© 1999-2002 SST, a division of Woodhead Canada Limited
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Use, duplication or disclosure of this document or any of the information contained herein is subject to the restrictions
established on page ii of this document.
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4.4 Strobe I/O Operation
The strobe I/O protocol is intended for simple input-only devices. The maximum produced size across a strobe I/O
connection, as defined by the DeviceNet protocol, is 8 bytes. The strobe I/O protocol has only a single bit of output data per
device. The 200X adapter does not make use of it’s output bit and can return up to a maximum of 8 bytes of input data
depending on the configuration present.
IMPORTANT:
Any configurations in which output data is required or in which the input data size exceeds 8 bytes will result
in the disabling of the strobe I/O connection.
4.5 Configuration
•
User configuration data is only accessible when the AutoConfig attribute in the 200X adapter object is false (0).
•
Changes to user configuration data do not take effect until the device is reset (RESET service with data value of zero
(0) to the identity object or a power cycle) or an I/O module is hot-swapped
•
Changes to user configuration data are stored in non-volatile memory immediately (before the explicit message
response is sent)
•
Changes to configuration data that have not taken effect yet are indicated by the ConfigChanged attribute in the
200X adapter object – the next device reset will apply the changes and clear ConfigChanged
•
User Configuration Data is not erased when going from User to Automatic Configuration Mode.
4.6 Configuration Consistency Value
The Configuration Consistency Value (CCV) is an indication of the current configuration within the device. If any
configuration information changes which affects the behavior of the device (i.e. expansion modules removed, parameter data
modified etc..) the CCV is updated.
NOTE
Because of the modular nature of the device and the method used to calculate the CCV it is not
possible to guarantee that there will never be a duplicate CCV for 2 different configurations.
4.7 Data Compression
The 5136-DNS-200X Adapters do not support expansion module data compression.
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