ABB ACS880-x04, Firmware Manual

Page: 359 / 604

Parameters 359
58.12 CRC errors Displays a count of packets with a CRC error received by the
drive. An increasing count indicates interference on the bus.
Can be reset from the control panel by keeping Reset
depressed for over 3 seconds. -
0…4294967295 Number of CRC errors. 1 = 1
58.14 Communication
loss action Selects how the drive reacts to an EFB communication break.
Changes to this parameter take effect after the control unit is
rebooted or the new settings validated by parameter
58.06
Communication control .
See also parameters 58.15 Communication loss mode and
58.16 Communication loss time .
Fault
No No action taken (monitoring disabled). 0
Fault Drive trips on 6681 EFB comm loss . This only occurs if control
is expected from the EFB (EFB selected as source of
start/stop/reference in the currently active control location), or
if supervision is forced using parameter
58.36 EFB comm
supervision force .
1
Last speed Drive generates an A7CE EFB comm loss warning and
freezes the speed to the level the drive was operating at. This
only occurs if control is expected from the EFB, or if
supervision is forced using parameter
58.36 EFB comm
supervision force .
The speed is determined on the basis of actual speed using
850 ms low-pass filtering.
WARNING! Make sure that it is safe to continue
operation in case of a communication break.
2
Speed ref safe Drive generates an A7CE EFB comm loss warning and sets
the speed to the speed defined by parameter 22.41 Speed ref
safe (or 28.41 Frequency ref safe when frequency reference
is being used). This only occurs if control is expected from the
EFB, or if supervision is forced using parameter
58.36 EFB
comm supervision force .
WARNING! Make sure that it is safe to continue
operation in case of a communication break.
3
Fault always Drive trips on 6681 EFB comm loss . This occurs even though
no control is expected from the EFB.
4
Warning Drive generates an A7CE EFB comm loss warning. This only
occurs if control is expected from the EFB, or if supervision is
forced using parameter
58.36 EFB comm supervision force .
WARNING! Make sure that it is safe to continue
operation in case of a communication break.
5
58.15 Communication
loss mode Defines which message types reset the timeout counter for
detecting an EFB communication loss.
Changes to this parameter take effect after the control unit is
rebooted or the new settings validated by parameter
58.06
Communication control .
See also parameters 58.14 Communication loss action and
58.16 Communication loss time .
Cw / Ref1 /
Ref2
Any message Any message addressed to the drive resets the timeout. 1
Cw / Ref1 / Ref2 A write of the control word or a reference from the fieldbus
resets the timeout. 2
No. Name/Value Description Def / FbEq16