Fault state, Fault value, Fault state fault value – Rockwell Automation 1769-BOOLEAN Compact I/O Module Reference Manual User Manual
Page 50
Publication 1769-RM016A-EN-P - July 2006
50 Module Data, Status, and Configuration
Fault State
This configuration selection provides the individual selection for the control of
the module outputs when the system enters the fault mode. Word 5, bits 0
…
3
are used to select the program state control mode for module outputs OUT0
through OUT3. When any of these bits are cleared (0) and the system enters
the fault mode, the module holds that output's last state, meaning that the
output remains at the last value prior to the condition that caused the control
system to enter the fault mode.
When any of these bits are set (1) and the system enters the fault mode, it
instructs the module to set the outputs to the corresponding user-specified
values from the configuration data file's Fault Value word.
Fault Value
Use the Fault Value word to set the values for the outputs to assume when the
system enters the fault mode and the Fault State bits for any outputs are set
(1). Word 6, bits 0
…
3 indicate the values to apply to the corresponding module
outputs OUT0 through OUT3. A value of 0 in any bit will set the
corresponding output to the OFF state when the system enters fault mode. A
value of 1 in any bit will set the corresponding output to the ON state when
the system enters the fault mode. The default setting for the Fault Value word
is 0 for all bits indicating that when applicable, all module outputs should be
set to the OFF state.
IMPORTANT
Hold last state is the default setting for the 1769-BOOLEAN
fault state control bits.
TIP
The MicroLogix 1500 and CompactLogix controllers do not yet
support fault state control. This functionality is currently only
supported when the module is used on the DeviceNet network
via the 1769-ADN adapter.
TIP
The MicroLogix 1500 and CompactLogix controllers do not yet
support fault state control. This functionality is currently only
supported when the module is used on the DeviceNet network
via the 1769-ADN adapter.