3-7
3 Data Exchange with the CPU Unit
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
3-
4 PROF
IBUS S
tar
tu
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3
Additional Information
•
Until the Set_Prm and Chk_Cfg have been accepted by the Unit, only the control and status
words are exchanged with the host CPU. The status information will indicate that no I/O data is
exchanged.
•
After the Set_Prm telegram is received by the Unit, it will check if the specified data areas in
the host CPU exist. If not, this will be indicated as a Parameter Fault to the PROFIBUS master,
and in variable
*_SlvSta
.
•
In case the parameters specify to include CPU status information in the input data, the amount
of input data read from the CPU will be 2 words less than the PROFIBUS input data length. If
the input data length is less than 2 words, this is also indicated as a Configuration Fault.
