Fieldbus control through the embedded fieldbus interface (EFB) 367
A control word sequence example is given below:
Start:
• 476h --> NOT READY TO SWITCH ON
If MSW bit 0 = 1 then
• 477h --> READY TO SWITCH ON (Stopped)
• 47Fh --> OPERATION (Running)
Stop:
• 477h = Stop according to 21.03 Stop mode
• 47Eh = OFF1 ramp stop (Note: uninterpretable ramp stop)
Fault reset:
• Rising edge of MCW bit 7
Start after STO:
• If 31.22 STO indication run/stop is not fault/fault make sure that 06.18 Start inhibit
status word, bit 7 STO = 0 before giving a start command.
References
References for the ABB Drives profile and DCU Profile
The ABB Drives profile supports the use of two references, EFB reference 1 and EFB
reference 2. The references are 16-bit words each containing a sign bit and a 15-bit
integer. A negative reference is formed by calculating the two’s complement from the
corresponding positive reference.
ACS180 FW.book Page 367 Tuesday, March 9, 2021 2:25 PM