ABB ACS880 - Page 419

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
Normal / uint16Selects 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 ms10 ms
Monitoring
10 ms2 ms
Normal
2 ms500 μs
Fast
2 ms250 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 52 FBA A data in and 53 FBA A 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 A timelevel sel50.21
0Normal speed.Normal
1Fast speed.Fast
2Very fast speed.Very fast
3Low speed. Optimized for PC tool communication and
monitoring usage.
Monitoring
- / uint16Activates fieldbus communication monitoring separately
for each control location (see section Local control vs.
external control (page 23)).
The parameter is primarily intended for monitoring the
communication with FBA A when it is connected to the
application program and not selected as a control source
by drive parameters.
FBA A comm
supervision force
50.26
1 = Communication monitoring active when Ext 1 is being
used.
Ext 1b0
1 = Communication monitoring active when Ext 2 is being
used.
Ext 2b1
1 = Communication monitoring active when local control
is being used.
Localb2
Reservedb3…15
1 = 10000h…FFFFh
Disable / uint16Enables/disables communication between the drive and
fieldbus adapter B, and specifies the slot the adapter is
installed into.
Note: This parameter cannot be changed while the drive
is running.
FBA B enable50.31
0Communication between drive and fieldbus adapter B
disabled.
Disable
Parameters 419