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TI 71M01D06-01EN 3rd Edition: 2012.12.01
Fieldbus communication error
The DrvPIII drive periodically detects communication errors at each I/O refresh timing. If the
DrvPIII drive detects a communication error, it does not refresh the input of the current cycle
and holds the previous input state. However, it refreshes the output from the drive itself.
If the communication error detection count exceeds the value specified, the DrvPIII drive
outputs [ERR47.0 IFB_C_ERR] and places itself in the error state. The type of processing to
be performed after error detection is in accordance with the setting of [#39 Error process
setup register 2].
Essentially, there should be no communication error. Perform communication after
implementing appropriate measures against the noise source. However, limited to the use for
debugging, for instance, it is possible to set a lower communication error detection sensitivity
temporarily. Using [#119 CC-Link setup register] (bits 14-12), set how many communication
errors are allowed to be successively detected. By setting "0," when a communication error is
detected even once, it is determined as a communication error and error process operation is
activated immediately. The setting range is from 0 to 5. The default setting is "0."
Using [#119 CC-Link setup register] (bits 24-16), the error detection frequency that can be
allowed per second can be set. By setting this parameter, communication errors that may
occur irregularly can also be processed properly. The setting range is from 1 to 500. The
default setting is "1."