Hi everybody.

At the company were I work we have migrated a S7-300 PLC (With STEP 7 Manager) that drives lots of servos to a S7-1500 PLC (with TIA Portal V16), but all the servos parameters functionalities of the HMI has gone. I have compared both codes (original and migrated) and the only difference was found at formatting HEX and Binary numbers. However, I formatted everything in TIA Portal as the STEP 7 Manager Code, but the problem continues.

The parameters of the servos are read/written via WRREC block. After trying to do some operation with the servo parameters via HMI, the ERROR Flag of the block becomes True, and STATUS Output give me this code:

16#C080_B100

Documentation says that the error is due to an length error, but I cant find anything different with the data set between the original and the migrated Code.

NOTE: The Only difference between the STEP 7 Manager code andd the TIA Portal V16 migrated Code is the next, this in the Reading Parameter Segment (please see the attached documents):

STEP7 Manager Code:

fnul: L     L#0

TIA Portal V16 Code:

fnul: L     DINT#0

The error occurs with all the instances of the WRREC block, where writing parameter, reading parameter, Zeroing Encoder, Save RAM to ROM and other functions are performed.

Let me know if you need the rest of the code that performs all the parameters management from the HMI.

Thank you all for your support