ABB ACSM1 Firmware Manual page 175

50.12 FBA CYCLE TIME
Selects the fieldbus communication speed. The default selection is
reduces the CPU load.
The table below shows the read/write intervals for cyclic and cyclic low data with each parameter
setting.
Selection
Slow
Normal
Fast
*Cyclic data consists of fieldbus CW and SW, Ref1 and Ref2, and Act1 and Act2.
**Cyclic low data consists of the parameter data mapped to parameter groups
(0) Slow
(1) Normal
(2) Fast
50.20 FB MAIN SW FUNC
Contains various compatibility settings especially for drive retrofits.
Bit Name
0 Run enable func 1 = Parameter only:
1 Mech brake func 1 = Force ramp stop:
FW block: FIELDBUS
Cyclic* Cyclic low*
10 ms 10 ms
2 ms 10 ms
500 us 2 ms
Slow speed selected.
Normal speed selected.
Fast speed selected.
FW block: FIELDBUS
Information
Bit 1 of 2.13 FBA MAIN SW
enable signal (par.
0 = Param AND Fb cw:
Bit 1 of 2.13 FBA MAIN SW
run enable signal (par.
MAIN CW bit 7 (RUN ENABLE) are 1.
Drive always uses ramp stop when a mechanical brake is used.
0 = Allow coast stop:
Coast stop is allowed when a mechanical brake is used.
(see above)
(2) Fast. Lowering the speed
(see above)
is set to 1 whenever the external run
10.09 RUN ENABLE) is 1.
is set to 1 whenever both the external
10.09 RUN ENABLE) is 1 AND
Parameters and firmware blocks
175
52 and 53.
2.12 FBA