Rockwell Automation 1794-APBDPV1 FLEX I/O PROFIBUS Adapter User Manual - Manual (Page 36)

Publication 1794-UM064B-EN-P - May 2014
24 Communicate With Your Module
-10…10V DC 1 1 1 1 1 1 1 1
Off 0 0 0 0 0 0 0 0
Where: C = Configure select bit
F = Full range bit
Off = When configured to off, individual channels will return 0V.
1794-OE4/B Word/Bit Descriptions
Word Decimal Bit Definition
Read Word 0 Bits 00…03 Current Outputs only – When set (1), the wire on the output is broken or
the load resistance is too high. Bit 00 corresponds to channel 0, bit 01
corresponds to channel 2, and so on.
Bit 04…14
(04…16) Not used – set to zero.
Bits 15 (17) Power Up bit – included in Series B modules only. This bit is 0 in Series A
modules. This bit is set to 1 when all bits in the configuration register are 0
(unconfigured state). The configuration register can be cleared by either of
the reset inputs, or by the user writing all zeroes to it.
Write Word 0 Bit 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 1 Bit 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 2 Bit 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 3 Bit 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 4 Bit 00…03 Chx Safe State 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, and so on.
1 = use words 0, 1, 2 or 3 as directed by channel number n
0 = use words 10, 11, 12 or 13 as directed by channel n
When bits 00…03 are all cleared (0) simultaneously by a communication
error or user choice thru the programmable controller program, word 5 full
range and configure select bits are preserved at their last setting.
Bits 04…15
(04…17) Not used – set to zero.
1794-OE4/B Range Selection Bits (Write Word 6)
Channel No. Channel 0 Channel 1 Channel 2 Channel 3
F0 C0 F1 C1 F2 C2 F3 C3
Decimal Bits
(Octal Bits) 00 08 01 09 02 10 03 11