ABB ACSM1 Manual page 208

208
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
0
1
Parameters and firmware blocks
FW block:
Cyclic*
10 ms
2 ms
500 us
Slow speed selected.
Normal speed selected.
Fast speed selected.
FW block:
Name Information
Run enable func 1 = Parameter only:
Bit 1 of
enable signal (par.
0 = Param AND Fb cw:
Bit 1 of
run enable signal (par.
MAIN CW
Mech brake func 1 = Force ramp stop:
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.
FIELDBUS (see above)
Cyclic low*
10 ms
10 ms
2 ms
FIELDBUS (see above)
2.13 FBA MAIN SW is set to 1 whenever the external run
10.09 RUN ENABLE) is 1.
2.13 FBA MAIN SW is set to 1 whenever both the external
10.09 RUN
bit 7 (RUN ENABLE) are 1.
(2) Fast. Lowering the speed
52 and 53.
ENABLE) is 1 AND 2.12 FBA