Rockwell Automation 1794-APBDPV1 FLEX I/O PROFIBUS Adapter User Manual - Manual (Page 38)

Publication 1794-UM064B-EN-P - May 2014
26 Communicate With Your Module
Not used – set to 0
Not used – set to zero. Write Words 8 and 9
Where: PU = Power up bit – included in Series B modules only.
W = Diagnostic bits for current output wire broken or load resistance high. (Not used on voltage outputs.)
U = Underrange bits for 4…20 mA inputs
S = Sign bit (in 2’s complement)
Chx SSC = Chx Safe State Config
C = Configure select bit
F = Full range bit
1794-IE4XOE2 Range Selection Bits
Channel No. Input
Channel 0 Input
Channel 1 Input
Channel 2 Input
Channel 3 Output
Channel 0 Output
Channel 1
F0 C0 F1 C1 F2 C2 F3 C3 F4 C4 F5 C5
Decimal Bits
(Octal Bits) 00 08
(10) 01 09
(11) 02 10
(12) 03 11
(13) 04 12
(14) 05 13
(15)
4…20 mA 1 0 1 0 1 0 1 0 1 0 1 0
0…10V DC/0…20 mA 0 1 0 1 0 1 0 1 0 1 0 1
-10…10V DC 1 1 1 1 1 1 1 1 1 1 1 1
Off 0 0 0 0 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-IE4XOE2 Word/Bit Descriptions
Word Decimal Bit Definition
Read 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.
Bit 15 (17) Channel 0 analog date sign bit.
Read 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.
Bit 15 (17) Channel 1 analog date sign bit.
Read Word 2 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.
Read Word 3 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 used all 16 bits.
Bit 15 (17) Channel 3 analog data sign bit.
1794-IE4XOE2 Memory Map
Decimal Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Size
Octal Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00 Read/Write Words