ABB FMBT-21, User Manual

Page: 38 / 92

Description Setting for ACS880 drives Drive parameter
Constant speed 2 22.27 53.03 FBA A data out3
Validates the FMBT-21 configura-
tion parameter settings. 1 = Refresh 51.27 FBA A par refresh
Selects the fieldbus A interface as
the source of the start and stop
commands for external control
location 1. 12 = Fieldbus A 20.01 Ext1 commands
Selects the fieldbus A reference 1
as the source for speed reference
1. 4 = FB A ref1 22.11 Speed ref1 source
Selects the fieldbus interface as
the source for the fault reset sig-
nal. 30 = FBA A MCW bit 7 31.11 Fault reset selection
1) Example
2) Read-only or automatically detected/set
The start sequence for the parameter example above is given below.
Control word:
• Reset the fieldbus communication fault (if active).
• Enter 47Eh (1150 decimal) -> READY TO SWITCH ON.
• Enter 47Fh (1151 decimal) -> OPERATING (Speed mode).
Client configuration
After the adapter module has been initialized by the drive, you must prepare the client
for communication with the module. Due to the large number of different Modbus
clients, specific instructions cannot be provided here. Refer to the documentation of
your client for more information.
￭
Modbus register maps
The Modbus register map which the adapter module presents to the Modbus client
is selected with parameter
02 Protocol/Profile.
For Modbus register map definitions, see chapter Modbus/TCP – Communication
protocol .
For definitions of the Control word, Status word, references and actual values for a
given communication profile, see chapter
Modbus/TCP – Communication profiles .
38 Modbus/TCP – Start-up