FIELDBUS COMMUNICATION 3.3. Status word and Control word 3.3.1. Status word The status word register is used to monitor the motor. This register can be used as an alter- native to using the digital input telegram (section 3.1).
Read status word using Modbus function code 3 Read Holding Registers or 4 Read Input Registers Protocol Address Bit Data Description 0300h 0 Reserved 1 Motor stopped status 0 = Motor running 1 = Motor stopped 2 Run status 0 = Motor stopped 1 = Motor running 3 Reserved 4 Reserved 5 Auto mode sta- tus 1 0 = Local control 1 = Modbus master control 6 Fault status 0 = No active fault 1 = One or more active faults 7 Reserved 8 Reserved 9 Reserved 10 Reserved 11 Start status Hardwire DI Start input signal state 0 = DI Start signal inactive 1 = DI Start signal active 12 Stop status Hardwire DI Stop input signal state 0 = DI Stop signal inactive 1 = DI stop signal active 13 Reset status Hardwire DI Reset input signal state 0 = DI Reset signal inactive 1 = DI Reset signal active 14 TOR status 0 = Softstarter is not in top of ramp 1 = Softstarter is in top of ramp (bypass closed) 15 Ready to start status 1 = No faults are active, control supply voltage is stable and motor will start when start command is given 0 = Fault is active or control supply voltage is not sta- ble and motor will not start when start command is given 1) Auto mode reflects the control state of the Softstarter.
This is affected by a combination of: – The Auto mode input signal from the Modbus master (protocol address 0105h in the digi- tal output telegram or bit 5 in the control word). – The parameter “Fieldbus control”. STATUS Approved PAGE 7/22 © Copyright 2019 ABB. All rights reserved. SECURITY LEVEL Public DOCUMENT ID. 1SFC132367M0201 REV. B LANG. en