Rockwell Automation 1794-APBDPV1 FLEX I/O PROFIBUS Adapter User Manual - Manual (Page 39)

Publication 1794-UM064B-EN-P - May 2014
Communicate With Your Module 27
Read Word 4 Bit 00…03 Underrange bits (U) – for individual channels (4...20 mA current inputs only)
-Bit 00 corresponds to input channel 0, bit 01 corresponds to input channel 1,
and so on. When set (1), indicates either a broken or open input wire, or input
current is @ or below 4 mA.
Bits 04…05 Wire Off bits (W) – Current outputs only – When set (1), the wire on the
current output is broken or the load resistance is too high. Bit 00 corresponds to
input channel 0, bit 01 corresponds to input channel 1, and so on.
Bits 06…14
(06…16) Not used
Bit 15 (17) Power Up bit – included in Series B modules only. This bit is always 0 in
Series A modules. This bit is set to 1 when all bits in the configuration register
(write word 3) 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…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.
Bit15
(17) Channel 0 analog date sign bit.
Write Word 1 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.
Bit15
(17) Channel 1 analog date sign bit.
Write Word 2 Bits 00…01 Chx Safe Sate Config – for individual channels. These bits control the safe
state analog outputs. Bit 00 corresponds to output channel 0, bit 01 corresponds
to output channel 1.
1 = use words 0 and 1 (analog value) as directed by channel number n
0 = use words 6 and 7 (safe state analog value) as directed by channel n
When bits 00...01 are cleared (0) simultaneously by a communication error or
user choice through the programmable controller program, word 3 full range
and configure select bits are preserved at their last setting.
Bits 02…15
(02…17) Not used – set to 0.
Write Word 3 Bits 00…05 Full Range bits (F) for individual channels – Bit 00 corresponds to input
channel 0, bit 01 corresponds to output channel 1, and so on.
Bits 06…07 Not used – set to 0.
Bit 08…13
(10…15) Configure Select bits (C) for individual channels – Bit 08 corresponds to input
channel 0, bit 09 (11) corresponds to input channel 1, bit 10 (12) corresponds to
input channel 2, bit 11 (13) corresponds to input channel 3, bit 12 (14)
corresponds to output channel 0, and bit 13 (15) corresponds to output
channel 1.
See Table 1794-IE4XOE2 Range Selection Bits on page 26 .
Bits 14…15
(16…17) Not used – set to 0.
Write Words
4 and 5 Not used – set to 0.
1794-IE4XOE2 Word/Bit Descriptions
Word Decimal Bit Definition