Cause:
A numeric variable in the variable file srd in the controller's ftp has a non-numeric value.
Troubleshooting:
Check the error source in the error information panel. Use the error source to find the variable file containing the variable reporting the error, then check whether the numeric variable's value is correct in that file.
Solution:
Contact after-sales support, modify the srd file reporting the error, and correct or delete the variable with the incorrect numeric value.
Case sharing:
None.