Siemens SIMATIC RF600 Series System Manual page 462

System diagnostics
9.2 XML/PLC error messages
"ER" XML/ PLC block
LED LED (hex)
(hex)
-- 0x97 0xE7FE09
-- 0x7A 0xE7FE0A
"--" means that the error is not displayed by the LEDs.
462
Error description
Command repetition is not supported.
Error during the transfer of the PDU (Protocol Data Unit).
System Manual, 11/2018, J31069-D0171-U001-A21-7618
SIMATIC RF600