Rockwell Automation 2085 Micro800 Discrete and Analog Expansion I/O Modules - Manual (Page 69)

Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 61
Expansion I/O Data Mapping Appendix B
Specialty I/O Data Mapping
2085-IRT4 I/O Data Mapping
Analog input values can be read from Global Variables _IO_Xx_AI_yy, where “x”
represents the expansion slot number 1…4 and yy represents the channel number
00…03.
Analog input status can be read from Global Variables IO_Xx_ST_yy, where “x”
represents the expansion slot number 1…4 and yy represents the status word
number 00…02. Individual bits within a status word can be read by appending a
.zz to the Global Variable name, where "zz" is the bit number 00...15.
Status 4 PU GF CRC Reserved Reserved E3 E2 E1 E0 S3 S2 S1 S0
Status 5 Reserved U3 O3 Reserved U2 O2 Reserved U1 O1 Reserved U0 O0
Status 6 Reserved
2085-OF4 Status Data Mapping
Word Bit Position
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Field Descriptions for 2085-OF4 Status Word
Field Description
CRC CRC error Indicates there is a CRC error on data receive. All channel fault bits
(Sx) are also set. The error is cleared when the next good data is
received.
Ex Error Indicates there is an DAC hardware error, broken wire or high load
resistance associated with the channel x, an error code may be
displayed on the respective input word (0…3) and the corresponding
channel is locked (disabled) until user clears the error by writing the
CEx bit in output data.
GF General Fault Indicates a fault has occurred, including: RAM test failure, ROM test
failure, EEPROM failure, and reserved bits. All channel fault bits (Sx)
are also set.
Ox Over-Range
Flag Indicates the controller is attempting to drive the analog output above
its normal operating range or above the channel's High Clamp level.
However the module continues to convert analog output data to a
maximum full range value if clamp levels are not set for the channel.
PU Power Up Indicates an unexpected MCU reset has occurred in RUN mode. All
channel error bits (Ex) and fault bits (Sx) are also set. The module stays
connected with no configuration after the reset. PU and channel fault
bits are cleared when a good configuration is downloaded.
Sx Channel Fault Indicates there is an error associated with the channel x.
Ux Under-Range
Flag Indicates the controller is attempting to drive the analog output below
its normal operating range or below the channel's Low Clamp level (if
clamp limits are set for the channel).