ABB ACS880 Series, Firmware Manual

Page: 471 / 764

Def / Type
FbEq 16b / 32b Description Name / Range /
Selection No.
Normal / uint16 Selects the communication time levels.
In general, lower time levels of read/write services
reduce CPU load. The table below shows the time levels
of the read/write services for cyclic high and cyclic low
data with each parameter setting.
Cyclic low ** Cyclic high * Selection
2 ms 10 ms Monitoring
10 ms 2 ms Normal
2 ms 500 μs Fast
2 ms 250 μs Very fast
* Cyclic high data consists of fieldbus Status word, Act1
and Act2.
** Cyclic low data consists of the parameter data
mapped to parameter groups
55 FBA B data in and 56
FBA B data out , and acyclic data.
Control word, Ref1 and Ref2 are handled as interrupts
generated on receipt of cyclic high messages.
Note: This parameter cannot be changed while the
drive is running.
FBA B timelevel sel 50.51
0 Normal speed. Normal
1 Fast speed. Fast
2 Very fast speed. Very fast
3 Low speed. Optimized for PC tool communication and
monitoring usage. Monitoring
- / uint16 Activates fieldbus communication monitoring
separately for each control location (see section
Local
control vs. external control (page 39) ).
The parameter is primarily intended for monitoring the
communication with FBA B when it is connected to the
application program and not selected as a control
source by drive parameters.
FBA B comm
supervision force 50.56
1 = Communication monitoring active when Ext 1 is
being used. Ext 1 b0
1 = Communication monitoring active when Ext 2 is
being used. Ext 2 b1
1 = Communication monitoring active when local
control is being used. Local b2
Reserved b3…15
1 = 1 0000h…FFFFh
Enable / uint16 Enables/disables the FBA automatic detection.
Note: FBA automatic detection works with one fieldbus
adapter only.
FBA automatic
detection 50.99
0 FBA automatic detection is disabled. Disable
1 FBA automatic detection is enabled. Enable
Parameters 471