Device-defined data types (1756-IF8)

Logix Designer
 and
FactoryTalk Design Studio
 programming software automatically creates device-defined data types and tags when a device is created. This table shows the device-defined data types that are created for the device depending upon the the selected communication format.
Comm Format
Device-defined Data Type
Float Data – Differential Mode *
AB:1756_IF4_CST_Float:I:0
AB:1756_IF4_Float:C:0
AB:1756_NII_Struct:C:0
CST Timestamped Float Data – High Speed Mode **
AB:1756_IF2_CST_Float:I:0
AB:1756_IF2_Float:C:0
AB:1756_NII_Struct:C:0
CST Timestamped Float Data – Single-Ended Mode ***
AB:1756_IF8_CST_Float:I:0
AB:1756_IF8_Float:C:0
AB:1756_NII_Struct:C:0
CST Timestamped Integer Data – Differential Mode *
AB:1756_IF4_CST_Integer:I:0
AB:1756_IF4_Integer:C:0
CST Timestamped Integer Data – High Speed Mode **
AB:1756_IF2_CST_Integer:I:0
AB:1756_IF2_Integer:C:0
CST Timestamped Integer Data – Single-Ended Mode ***
AB:1756_IF8_CST_Integer:I:0
AB:1756_IF8_Integer:C:0
Float Data - Differential Mode *
AB:1756_IF4_Float:I:0
AB:1756_IF4_Float:C:0
AB:1756_NII_Struct:C:0
Float Data – High Speed Mode **
AB:1756_IF2_Float:I:0
AB:1756_IF2_Float:C:0
AB:1756_NII_Struct:C:0
Float Data – Single-Ended Mode ***
AB:1756_IF8_Float:I:0
AB:1756_IF8_Float:C:0
AB:1756_NII_Struct:C:0
Integer Data - Differential Mode *
AB:1756_IF4_Integer:I:0
AB:1756_IF4_Integer:C:0
Integer Data – High Speed Mode **
AB:1756_IF2_Integer:I:0
AB:1756_IF2_Integer:C:0
Integer Data – Single-Ended Mode ***
AB:1756_IF8_Integer:I:0
AB:1756_IF8_Integer:C:0
Listen Only – CST Timestamped Float Data
Differential Mode *
AB:1756_IF4_CST_Float:I:0
Listen Only – CST Timestamped Float Data
High Speed Mode **
AB:1756_IF2_CST_Float:I:0
Listen Only – CST Timestamped Float Data
Single-Ended Mode ***
AB:1756_IF8_CST_Float:I:0
Listen Only – CST Timestamped Integer Data
Differential Mode *
AB:1756_IF4_CST_Integer:I:0
Listen Only – CST Timestamped Integer Data
High Speed Mode **
AB:1756_IF2_CST_Integer:I:0
Listen Only – CST Timestamped Integer Data
Single-Ended Mode ***
AB:1756_IF8_CST_Integer:I:0
Listen Only – Float Data Differential Mode *
AB:1756_IF4_Float:I:0
Listen Only – Float Data High Speed Mode **
AB:1756_IF2_Float:I:0
Listen Only – Float Data Single-Ended Mode ***
AB:1756_IF8_Float:I:0
Listen Only – Integer Data Differential Mode *
AB:1756_IF4_Integer:I:0
Listen Only – Integer Data High Speed Mode **
AB:1756_IF2_Integer:I:0
Listen Only – Integer Data Single-Ended Mode ***
AB:1756_IF8_Integer:I:0
*
Differential mode on an 8-channel device means that only 4 channels are used, which results in IF4 in the input and configuration device-defined data types.
** High speed mode on a 16-channel device means that only 4 channels are used, which results in IF4 in the input and configuration device-defined data types.
*** Single-ended mode maximizes the number of usable channels on the device (8 channels for 1756-IF8 device).
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