Rockwell Automation 1794-XXXX FLEX I/O High-Density Analog Modules - Manual (Page 72)

Publication 1794-UM062A-EN-P - September 2012
64 Data Tables
Read word 8 Bits 00…07 Out of range bits (R) for individual channels – Bit 00
corresponds to input channel 0, bit 01 corresponds to
input channel 1, and so on. When set (1), indicates out
of range. For more details on out of range, see
Table Range Selection Bits – 1794-IE12 Analog Input
Module on page 48
.
Bits 08…11
(10…13) Wire Off – Indicates the wire, for the associated
output channel configured for current, has become
disconnected or that the load resistance is too high.
Bit 12 (14) Not used – set to 0.
Bit 13 (15) General Fault – Bit set to 1 if a fault has occurred
including: RAM test failure, ROM test failure,
reserved bits asserted (bits 12…0 of the Reserved
word and 15…12 of the Config word) and
EEPROM failure.
Bit 14 (16) Field Power Off – Bit is set to 1 if the field power
is off. This is not an indication of field power that is
out of tolerance.
Bit 15 (17) Power Up bit – This bit is set to 1 when all bits in the
configuration register (write word 1) are 0
(unconfigured state).
Write word 0 Bits 00…11
(00…13) Not Used.
Bit 12 (14) Wire Off Reset – when asserted allowes the latched
wire-off bits to be cleared.
Bit 13…14
(15…16) Safe State Source – When EN = 0, these bits
indicate source of safe state output, see
Table Safe
State Selection Bits – 1794-IE8XOE4 Analog Combo
Module on page 63
.
Bit 15 (17) Enable Outputs – instructs the outputs to go to their
commanded level. When EN = 0, the outputs go to the
level as directed by S1/S0.
Write word 1 Bits 00…14
(00…16) Channel 0 analog data – 12-bit left justified two's
complement number; unused lower bits are zero;
4…20 mA uses all 16 bits.
Bit 15 (17) Channel 0 analog data sign bit.
Write word 2 Bits 00…14
(00…16) Channel 1 analog data – 12-bit left justified two's
complement number; unused lower bits are zero;
4…20 mA uses all 16 bits.
Bit 15 (17) Channel 1 analog data sign bit.
Write word 3 Bits 00…14
(00…16) Channel 2 analog data – 12-bit left justified two's
complement number; unused lower bits are zero;
4…20 mA uses all 16 bits.
Bit 15 (17) Channel 2 analog data sign bit.
Word/Bit Descriptions – 1794-IE8XOE4 Analog Combo Module
Word Decimal Bit
(Octal Bit) Definition