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Allen-Bradley DF1 Driver Help

Serious

Possible Cause:

There is bad cabling connecting the devices causing noise and checksum errors.

Solution:

Inspect cabling between the Host PC and the device.

Unable to read data starting at <start address> on device '<device name>'.

Slave sink/source full

Error Type:

Serious

Possible Cause:

The slave device cannot accept anymore requests from the master. The client may be requesting data too fast.

Solution:

The driver will automatically poll and re-poll the slave to empty its source and in turn make room for responses

from requests previously in the full sink. If this error occurs too often, decrease the update rate on suspected

tags.

Unable to read function file <fun. file element> on device '<device name>'.

Slave sink/source full

Error Type:

Serious

Possible Cause:

The slave device cannot accept anymore requests from the master. The client may be requesting data too fast.

Solution:

The driver will automatically poll and re-poll the slave to empty its source and in turn make room for responses

from requests previously in the full sink. If this error occurs too often, decrease the update rate on suspected

function file tags.

Unable to read data starting at <start address> on device '<device name>'.

Slave source empty

Error Type:

Serious

Possible Cause:

The slave device does not have a response prepared for the data request starting at <start address>. The slave

re-poll delay may be set to short.

Solution:

The driver will automatically poll and re-poll the slave in seek of a poll response. If this error occurs too often,

increase the slave re-poll delay on the given channel.

Unable to read function file <fun. file element> on device '<device name>'.

Slave source empty

Error Type:

Serious

Possible Cause:

The slave device does not have a response prepared for the request of function file <fun. file element>. The slave

re-poll delay may be set to short.

Solution:

The driver will automatically poll and re-poll the slave in seek of a poll response. If this error occurs too often,

increase the slave re-poll delay on the given channel.

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Back to Basics SCL5 Spécifications Page 49

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