FIELDBUS COMMUNICATION 4.6. Read diagnostic data FC = 03 Protocol Address = 2000h E.g: Read 4 words starting at the address: 2000h Request: Response: Indicating “Fieldbus fault” and “Extended diagnostic available” flags are set. STATUS Approved PAGE 18/22 © Copyright 2019 ABB. All rights reserved. Modbus Master Modbus-RTU: Slave NR.47 Request RS485 / Modbus RTU Softstarter Response 2F 03 20 00 00 04 49 87 { { { Slave 47 FC = 03 Address 4 words CRC 2F 03 08 01 00 00 00 00 00 00 80 CA 93 { { { { { Slave 47 FC = 03 8 Bytes W0 W1 W2 W3 CRC SECURITY LEVEL Public 1 DOCUMENT ID. SFC132367M0201 REV. B LANG. en