[Cause]
When the robot is the DP master, the robot checks the status of the DP slave at the communication destination. The DP slave at the address indicated by the number in parentheses is not yet ready to send data. For details, refer to the explanation of “Diag.Station_Not_Ready of Station_staus_1” in 8.3.1 of “Draft Standard PROFIBUS-DP DIN 19245 Part3”.
[Countermeasure]
Adjust the DP slave at the address indicated by the number in parentheses so that the DP slave is ready to send data until the DP slave receives a data transmission request from the DP master.