Rockwell Automation RECOMM-PBUS PROFIBUS Communications Module - Manual (Page 28)

4-4 PROFIBUS Communications Module
4.5 Setting a Fault Action
By default, when communications are disrupted (for example, a
cable is disconnected) or the master is idle, the drive responds by
faulting if it is using I/O from the network. You can configure a
different response to communication disruptions using module
parameter 9 (Comm Flt Action) and a different response to an idle
scanner using parameter 10 (Idle Flt Action).
Set the values of parameter 9 (Comm Flt Action) and parameter 10
(Idle Flt Action) to the desired responses as shown in table 4.2. See
figure 4.4 for sample LCD OIM Fault Action screens.
Changes to these parameters take effect immediately. A reset is not
required.
!
ATTENTION: Parameter 9 (Comm Flt Action) and
parameter 10 (Idle Flt Action) let you determine the
action of the module and connected drive if
communications are disrupted or the scanner is idle.
By default, these parameters fault the drive. You can
set these parameters so that the drive continues to
run. Precautions should be taken to ensure that the
settings of these parameters do not create a risk of
injury or equipment damage.
Table 4.2 – Selections for Drive Response to Communication Fault
Value Action Description
0 Fault (default) The drive is faulted and stopped (Default).
1 Stop The drive is stopped, but not faulted.
2 Zero Data The drive is sent 0 for output data after a
communications disruption. This does not
command a stop.
3 Hold Last The drive continues in its present state after a
communications disruption.
4 Send Flt Cfg The drive is sent the data that you set in the
fault configuration parameters 13 through 22
(Flt Cfg Logic through Flt Cfg D2 In).
Figure 4.4 – Fault Action Screens on an LCD OIM
Port 5 Device
RECOMM-PBUS
Parameter #: 9
Comm Flt Action
0
Fault
Port 5 Device
RECOMM-PBUS
Parameter #: 10
Idle Flt Action
0
Fault