Rockwell Automation 1794-APBDPV1 FLEX I/O PROFIBUS Adapter User Manual User Manual
Page 63
Publication 1794-UM064B-EN-P - May 2014
Communicate With Your Module 51
1794-IF4I Isolated Analog Input Module Word/Bit Descriptions
Write Word
Decimal Bit
(Octal Bit)
Definition
Write Word 0
Bit 00…12
(00…14)
Not used.
Bit 13…14
(15…16)
Safe State Configure (S1/S0) – When EN is 0, these bits designate the source of the
safe state data.
Bit 13 = 0, bit 14 = 1 – reset outputs to 0V/0mA (used with 1794-ASB/C)
Bit 13 = 1, bit 14 = 1 – hold output at its current level (used with 1794-ASB/C)
Bit 13 = 0, bit 14 = 0 – Safe state data is in output data words
Bit 15 (17)
Output Enable bit (EN) – When set (1), the outputs are enabled. This bit must be set in
order for the real time data to appear at the outputs. If this bit is not set (0), the outputs
will be determined by S1/S0.
Write Word 1
Bit 00…15
(00…17)
Channel 0 output data – The output data is real time data formatted to the selected
configuration. This data is also safe state data when directed by S1 and S0.
Write Word 2
Bit 00…15
(00…17)
Channel 1 output data – The output data is real time data formatted to the selected
configuration. This data is also safe state data when directed by S1 and S0.
Write Word 3
Bit 00…15
(00…17)
Channel 2 output data – The output data is real time data formatted to the selected
configuration. This data is also safe state data when directed by S1 and S0.
Write Word 4
Bit 00…15
(00…17)
Channel 3 output data – The output data is real time data formatted to the selected
configuration. This data is also safe state data when directed by S1 and S0.
Write Word 5
Channel Configuration (see
1794-OF4I Isolated Analog Output Module Read Words on page 48
)
Bits 00…03
Channel 0 Configuration
Bit 04…07
Channel 1 Configuration
Bit 08…11
(10…13)
Channel 2 Configuration
Bit 12…15
(14…17)
Channel 3 Configuration