4–6
Writing Configuration to and Reading Status from Your Module with a Remote I/O Adapter
Publication 17946.5.2 - May 1996
4 Output Analog Module (Cat. No. 1794OE4 Series B)
Module Image
I/O Image
Analog Data Channel 0
Analog Data Channel 1
Analog Data Channel 2
Analog Data Channel 3
Channel 0 Safe State
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Not used
Diagnostics
Config. Select
Full Range
Input Size
Output Size
0 or 1 Word
1 to 14 Words
Read
Write
M
PU
Channel 1 Safe State
Channel 2 Safe State
Channel 3 Safe State
Analog Output Module (1794-OE4/B) Read
Word/Dec. Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Word/Octal Bit
17
16
15
14
13
12
11
10
07
06
05
04
03
02
01
00
Read Word 0
PU
Not used - set to 0
W3 W2 W1 W0
Where:
W = Diagnostic bits for current output wire broken or load resistance high. (Not used on voltage outputs.)
PU = Power up bit
Bit/Word Descriptions for the 1794-OE4/B Analog Output
Module Read
Word
Decimal Bit
(Octal Bit)
Definition
Bits 0003
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.
Read
Word 0
Bits 0414
(04-16)
Not used - set to 0
Word 0
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 5) are 0 (unconfigured state).
The configuration
register can be cleared by either a reset, or by the user writing all zeroes to it.