How to Fix PHU Series IGH Master Cannot Enter OP?

Use SDO in IGH: write 1 to PHU dictionary 2100, then write 1 to dictionary 2130 to save, switching to EC mode.
sudo su and set path: export LD_LIBRARY_PATH=path
RPDO index: write 0x1600 (customer was using 1603)
TPDO index: write 0x1a00