Allen-Bradley 1756-IA8D User Manual

202 Rockwell Automation Publication 1756-UM058G-EN-P - November 2012
Appendix B Tag Definitions
1756-OB16IEFS Module
The tag names and data structures for the 1756-OB16IEFS module vary based
on the module definition:
• For Scheduled Per Point output, the module uses a flat data structure. See
Table 50
, Ta ble 5 2, and Tabl e 54.
• For Data output or Listen Only connections, the module uses an array data
structure. See Ta b l e 5 1
, Tabl e 53, and Ta b l e 55 . For more information
about array data structures, see Array Data Structures
on page 211.
Pt[x].PWMOnTime REAL PWM On Time—Defines the length of time that a pulse is active. Requires PWM to be
enabled via the Pt[x].PWMEnable configuration tag.
Valid values:
0.0002…3600.0 seconds
or
0…100.0 percent
Connection = Data
Output Data = Data or Scheduled
per Module
or
Connection = Peer Ownership
Output Data = Data with Peer
TimestampOffset DINT Timestamp Offset—Indicates the difference between the system time and the module’s
local time. The timestamp is in CIP Sync time.
This value is typically set to zero but can be updated with the value of the SystemOffset in
the controller’s TIMESYNCHRONIZE object to enable Time Step Compensation in the
module.
Connection = Data
Output Data = Scheduled per
Module
Timestamp DINT Timestamp—CIP Sync time at which to apply scheduled output data. Connection = Data
Output Data = Scheduled per
Module
Table 49 - 1756-OB16IEF Module Output Data Tags (continued)
Name Data
Type
Tag Definition Module Definition
Table 50 - 1756-OB16IEFS Module Configuration Tags—Scheduled per Point Output
Name Data Type Tag Definition Module Definition
ProgToFaultEn BOOL Program to Fault Mode—Enables the transition of outputs to Fault mode if a
communication failure occurs in Program mode. Otherwise, outputs will remain in
Program mode. See FaultMode, FaultValue, ProgMode, and ProgValue.
0 = Outputs stay in Program mode if communication fails.
1 = Outputs go to Fault mode if communication fails.
Connection = Data
Output Data = Scheduled per
Point
FaultMode BOOL Fault Mode—Used in conjunction with the FaultValue tag to determine the state of
outputs when a communication failure occurs.
0 = Uses the output value defined in the Pt[x].FaultValue configuration tag (default).
1 = Holds the last state of the output for the length of time defined in the
FaultValueStateDuration tag. If PWM is enabled for the output point and the output is
currently On, the output will continue PWM until the cycle limit is reached or a final fault
state goes into effect via the FaultFinalState tag.
Connection = Data
Output Data = Scheduled per
Point
FaultValue BOOL Fault Value—Defines the output value when a fault occurs. Holds the configured state of
the output for the length of time defined in the FaultValueStateDuration tag.
Requires the corresponding bit in the FaultMode tag to be cleared.
0 = Off
1 = On
Connection = Data
Output Data = Scheduled per
Point

Allen-Bradley 1756-IA8D Specifications

General

Brand	Allen-Bradley
Model	1756-IA8D
Category	Control Unit
Language	English