Setting a fault action, Changing the fault action – Rockwell Automation 20-750-PBUS Profibus DPV1 Option Module User Manual
Page 33
Rockwell Automation Publication 750COM-UM004B-EN-P - September 2012
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Configuring the Option Module Chapter 3
Setting a Fault Action
By default, when communication is disrupted (for example, the network cable is
disconnected) or the master (controller) is idle, the drive responds by faulting if it
is using I/O from the network. You can configure a different response to these
events:
•
Disrupted I/O communication by using
Host Parameter 33 - [Comm Flt
Action].
•
An idle controller by using
Host Parameter 34 - [Idle Flt Action].
Changing the Fault Action
Set the values of
Host Parameters 33 - [Comm Flt Action] and 34 - [Idle Flt
Action]
to any of these responses.
Figure 6 - Edit Fault Action HIM Screens
Changes to these parameters take effect immediately. A reset is not required.
If communication is disrupted and then is re-established, the drive will
automatically receive commands over the network again.
ATTENTION: Risk of injury or equipment damage exists. Host
Parameters 33 - [Comm Flt Action], and 34 - [Idle Flt Action] let you
determine the action of the option module and connected drive if
communication is disrupted or the master (controller) is idle. By default,
these parameters fault the drive. You may configure these parameters so
that the drive continues to run, however, precautions should be taken to
verify that the settings of these parameters do not create a risk of injury or
equipment damage. When commissioning the drive, verify that your
system responds correctly to various situations (for example, a
disconnected network cable or controller in idle state).
Value Action
Description
0
Fault
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. This does not command a stop.
3
Hold Last
The drive continues in its present state.
4
Send Flt Cfg
The drive is sent the data that you set in the fault configuration
parameters (Host Parameters 37 - [Flt Cfg Logic], 38 - [Flt Cfg Ref], and
39 - [Flt Cfg DL 01] through 54 - [Flt Cfg DL16]).
ESC
ENTER
Stopped
0.00 Hz
AUTO
F
▲
▼
Edit Comm Flt Action
Fault
0
0 << 4
ESC
ENTER
Stopped
0.00 Hz
AUTO
F
▲
▼
Edit Idle Flt Action
Fault
0
0 << 4