Specifications

Analog Output Modules
31007715 6/2008 317
Output
Status Registers
The input data and I/O status process image is 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 1210 is represented by two contiguous registers—the first shows
output status for channel 1 and the second shows output status for channel 2. The
six LSBs in each register represent the status of each input channel:
1 Bit 0 is the global status (GS) bit for the output channel. It has a value of 0 when no errors
have been detected. It has a value of 1 when bit 1 has a value of 1.
2 Bit 1 represents the status of PDM voltage on the island’s actuator bus. It has a value of 0
when no PDM voltage errors are detected. It has a value of 1 if actuator power has been
shorted. A PDM short turns on the GS bit (bit 0).
3 Bit 2 represents the presence or absence of an OCW. It has a value of 0 when the current
is less than or equal to a numerical count of 32 000. It has a value of 1 when the current is
greater than 32 000. An OCW in the STB ACO 1210 does not turn on the GS bit (bit 0).
4 Bit 3 represents the presence or absence of an OCE. It has a value of 0 when the current
is less than a numerical count of 32 760 and a value of 1 when the current is set to 32 760.
An OCE in the STB ACO 1210 does not turn on the GS bit (bit 0).
5 Bit 4 represents the presence or absence of an UCW. It has a value of 0 when the current
is greater than or equal to a numerical count of 768 and a value of 1 when the current is
less than 768. An OCE in the STB ACO 1210 does not turn on the GS bit (bit 0).
6 Bit 5 represents the presence or absence of an UCE. It has a value of 0 when the current
is greater than 0 and a value of 1 when the current is 0. An OCE in the STB ACO 1210
does not turn on the GS bit (bit 0).
STB ACO 1210 1230 Status Register Format
always 0
67
1
23
45
0
1415
9
10
111213
8
not used;
GS (see 1)
PDM (see 2)
OCW (see 3)
OCE (see 4)
UCW (see 5)
UCE (see 6)
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