Rockwell Automation 20-COMM-H RS485 HVAC Adapter FRN 2.xxx - Manual (Page 29)

Configuring the Adapter 3-7
20-COMM-H RS-485 HVAC Adapter User Manual
Publication 20COMM-UM009D-EN-P
Setting a Fault Action By default, when I/O communications are disrupted (for example, a cable is
disconnected), the drive responds by faulting if it is using I/O from the
network. You can configure a different response to disrupted I/O
communication using Parameter 15 - [Comm Flt Action].
Changing the Fault Action
Set the value of Parameter 15 - [Comm Flt Action] to the desired
response:
Figure 3.7 Example Fault Action Screen
Changes to this parameter takes effect immediately. A reset is not required.
Setting the Fault Configuration Parameters
If you set Parameter 15 - [Comm Flt Action] to “Send Flt Cfg,” the values
in the following parameters are sent to the drive after an I/O
communications fault occurs. You must set these parameters to values
required by your application.
Changes to these parameters take effect immediately. A reset is not required.
!
ATTENTION: Risk of injury or equipment damage exists.
Parameter 15 - [Comm Flt Action] lets you determine the action
of the adapter and connected drive if I/O communications are
disrupted. By default, this parameter faults the drive. You can set
this parameter so that the drive continues to run. Precautions
should be taken to ensure that the setting of this parameter does
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 cable).
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. (The command word and Reference are
set to zero.) 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
(Parameters 18 - [Flt Cfg Logic] through 27 - [Flt Cfg D2 In]).
Parameter Name Description
25 Flt Cfg Logic A 16-bit value sent to the drive for Logic Command.
26 Flt Cfg Ref A 32-bit value (0 – 4294967295) sent to the drive as a Reference or
Datalink.
Important: If the drive uses a 16-bit Reference or 16-bit Datalinks, the most
significant word of the value must be set to zero (0) or a fault will occur.
27 – 34 Flt Cfg x1 In
or
Flt Cfg x2 In
Port 5 Device
20-COMM-H
Parameter #: 15
Comm Flt Action
0
Fault