Specifications

Analog Output Modules
346
31007715 6/2008
Output
Status Registers
The I/O status process image is located in a reserved block of 4096 16-bit registers
(in the range 45 392 through 49 487) that represent the status of all the I/O modules
(along with the data for the input modules) on the island bus.
The STB ACO 0120 is represented by one register. This shows the status for the
channel. The seven LSBs in the register represents the status of the output channel.
1. Bit 0 represents global status (GS). It has a value of 0 when no errors are
detected. It has a value of 1 when bit 6 has a value of 1.
2. Bit 2 represents the presence or absence of an OCW. It has a value of 0 when
the data value is less than or equal to 32 000 and a value of 1 when the data value
is greater than 32 000. An OCW does not turn on the GS bit (bit 0).
3. Bit 3 represents the presence or absence of an OCE. It has a value of 0 when the
data value is less than 32 767 and a value of 1 when the data value reaches
32 767. An OCE does not turn on the GS bit (bit 0).
4. Bit 4 represents the presence or absence of a UCW. It has a value of 0 when the
data value is greater than or equal to 0 and a value of 1 when the data value is
less than 0. A UCW does not turn on the GS bit (bit 0).
5. Bit 5 represents the presence or absence of a UCE. It has a value of 0 when the
data value is greater than -1 000 and a value of 1 when the data value is less than
or equal to -1 000. A UCE does not turn on the GS bit (bit 0).
6. Bit 6 represents the physical status of output channel. It has a value of 0 when no
hardware errors (HWEs) are detected and a value of 1 if there is a broken wire or
the channel is not powered. An HWE turns on the GS bit (bit 0).
STB ACO 0120 Status Register Format
always 0
67
1
23
45
0
1415
9
10
11
12
13
8
not used;
GS (see 1)
not used; always 0
OCW (see 2)
OCE (see 3)
UCW (see 4)
UCE (see 5)
HWE (see 6)
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