Rockwell Automation 1794-XXXX FLEX I/O High-Density Analog Modules User Manual
Page 64
Publication 1794-UM062A-EN-P - September 2012
56
Data Tables
Word/Bit Descriptions – 1794-OE12 Analog Output Module
Word
Decimal Bit
(Octal Bit)
Definition
Read Word 0
Bits 00…11
(00…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.
Bit 13 (15)
General Fault – Bit is set to 1 if there is a fault to
the module.
Bit 14 (16)
Field Power Off – Bit is set to 1 if the field power
is off.
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). The configuration register can be
cleared by either a reset, or by the user writing all
zeroes to it.
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
State Selection Bits – 1794-OE12 Analog Output
Module on page 55
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.
Write word 4
Bits 00…14
(00…16)
Channel 3 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 3 analog data sign bit.
Write word 5
Bits 00…14
(00…16)
Channel 4 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 4 analog data sign bit.