Manual
328 Publication 1756-UM009C-EN-P - December 2010
Appendix B Analog I/O Tag Definitions
Integer Output Tags
CJOverrange BOOL 1756-IT6I and
1756-IT6I2
Status bit to indicate if the cold junction reading is currently above the highest
detectable temperature of 86.0 °C (186 °F).
ChannelStatus INT All Collection of individual channel status bits.
Ch0Underrange BOOL All inputs Alarm bits indicating the channel’s input is less than the minimum detectable
input signal.
Ch0Overrange BOOL All inputs Alarms bit indicating the channel’s input is greater than the maximum
detectable input signal.
Ch0Data INT All inputs The channel input signal represented in counts where -32,768 counts is the
minimum detectable input signal and 32,767 counts is the maximum
detectable.
CJData INT 1756-IT6I and
1756-IT6I2
The cold junction sensor temperature in counts where -32,768 counts is
0 °C (32 °F) and 32,767 counts is 86 °C (186 °F).
CSTTimestamp Array of
DINT
All (if the CST
connection is
selected)
Timestamp taken at time the input data was sampled, or if an output when the
output was applied, and placed in terms of coordinated system time that is a
64-bit quantity in microseconds coordinated across the rack. Must be
addressed in 32-bit chunks as an array.
RollingTimestamp INT All Timestamp taken at time the input data was sampled, or if an output when the
output was applied, that is in terms of milliseconds relative solely to the
individual module.
Integer Input Tags
Tag Name Data Type Applicable
Modules
Definition
Integer Output Tags
Tag Name Data Type Applicable
Modules
Definition:
Ch0Data INT All outputs The value the channel is to output in counts where the minimum producible
output is -32,768 counts and 32,767 counts is the maximum producible.
Ch0DataEcho INT All outputs The value the channel is currently outputting in counts where -32,768 counts
is the minimum producible output signal and 32,767 counts is the
maximum producible.
OutGroupFault BOOL All outputs Indicates if a channel fault has occurred on any output channel.
Ch0InHold BOOL All outputs Bit that indicates if the output channel is currently holding until the Output
value sent to the module (O tag Ch0Data) matches the current output value
(I tag Ch0Data) within 0.1% of the channel’s full scale.