Rockwell Automation 1756-XXXX ControlLogix Digital I/O Modules User Manual
Page 187
Rockwell Automation Publication 1756-UM058G-EN-P - November 2012
187
Tag Definitions
Appendix B
Table 38 - Standard Output Module Input Data Tags
Name
Data Type
Definition
CSTTimestamp
(8 bytes)
DINT[2]
Coordinated System Time Timestamp—Timestamp of diagnostic input data including fusing (see BlownFuse,
NoLoad, OutputVerifyFault, FieldPwrLoss), which is updated whenever a diagnostic fault occurs or goes away.
Data
(1 bit per point)
DINT
Data—Off/On status for the output point echoed back from the output module. This is used to verify proper
communication only. No field side verification is done. For field side verification, see OutputVerifyFault.
0 = Off
1 = On
Fault
(1 bit per point)
DINT
Fault—This is an ordered status of faults that indicates a point is faulted and I/O data for that point may be incorrect.
Check other diagnostic faults, if they are available, for further diagnosis of the root cause. If communication to the input
module is lost, then all points for the module will be faulted.
0 = No fault
1 = Fault (FuseBlown, NoLoad, OutputVerifyFault, FieldPwrLoss, or CommFault)
FuseBlown
(1 bit per point)
DINT
Fuse Is Blown—An electronic or mechanical fuse has detected a short or overload condition for an output point. All
FuseBlown conditions are latched and must be reset by the user.
0 = No fault
1 = Fault
Table 39 - Standard Output Module Output Data Tags
Name
Data Type
Definition
CSTTimestamp
(8 bytes)
DINT[2]
Coordinated System Time Timestamp—Timestamp to be used with scheduled outputs and coordinated system time
(CST). Used to synchronize outputs across the system by indicating the time (CST timestamp) at which the output module
is to apply its outputs.
Data
(1 bit per point)
DINT
Output Status—On/Off status of the output point originating from the controller.
0 = Off
1 = On
Table 40 - Diagnostic Output Module Configuration Tags
Name
Data Type
Definition
FaultLatchEn
(1bit per point)
DINT
Latch Fault—If enabled for a point, any NoLoad, OutputVerifyFault or FieldPwrLoss stays latched in the faulted state
even if the fault no longer exists until the user clears the fault. This does not affect FuseBlown; it is always latched.
0 = Disable
1 = Enable latching
FaultMode
(1bit per point)
DINT
Fault Mode—Used in conjunction with FaultValue to configure the state of outputs when a communication fault occurs.
See FaultValue.
0 = Use FaultValue (Off or On)
1 = Hold Last State
FaultValue
(1 bit per point)
DINT
Fault Value—Used in conjunction with FaultMode to configure the state of outputs when a communication fault occurs.
See FaultMode.
0 = Off
1 = On
FieldPwrLoss
(1 bit per point)
DINT
Field Power Loss—Enables Field Power Loss diagnostic.
0 = Disable
1 = Enable
NoLoadEn
(1 bit per point)
DINT
No Load—Enables No Load diagnostic.
0 = Disable
1 = Enable
OutputVerifyEn
(1 bit per point)
DINT
Output Verify—Enables Output Verify diagnostic.
0 = Disable
1 = Enable