What to do if data cannot be written/read from Inovance MD520 DC Drives?
- SSusan PhillipsAug 18, 2025
If data cannot be written into or read from the Inovance DC Drives after a successful connection, verify the accuracy of the operated address. For instance, with I and Q addresses at 520-531, PZD1 and PZD2 data are stored in QW520 and QW522, respectively (use PQW for S7-300/S7-400 PLCs). When using SFC15, ensure RET_VAL is 0 to avoid invocation errors.