Specifications

Analog Output Modules
31007715 6/2008 315
STB ACO 1210 Data and Status in the Process Image
Representing
the Analog
Output Data
The NIM keeps a record of output data in one block of registers in the process image
and a record of output status in another block of registers in the process image.
Information in the output data block is written to the NIM by the fieldbus master and
is used to update the output module. The information in the status block is provided
by the module itself.
This process image information can be monitored by the fieldbus master or, if you
are not using a basic NIM, by an HMI panel connected to the NIM’s CFG port. The
specific registers used by the STB ACO 1210 module are based on its physical
location on the island bus.
Output
Data Registers
The output data process image is a reserved block of 4096 16-bit registers (in the
range 40001 through 44096) that represents the data returned by the fieldbus
master. Each output module on the island bus is represented in this data block. The
STB ACO 1210 uses two contiguous registers in the output data block—the first for
the data in channel 1 and the second for the data in channel 2.
The STB ACO 1210’s two output data registers represent the channel data in the
IEC data format. The data has 12-bit resolution. The bit structure in each of the two
data words is as follows:
Note: The data format illustrated below is common across the island bus,
regardless of the fieldbus on which the island is operating. The data is also
transferred to and from the master in a fieldbus-specific format. For fieldbus-
specific descriptions, refer to one of the Advantys STB Network Interface Module
Application Guides. Separate guides are available for each supported fieldbus.
always 0
2
14
2
13
2
12
2
11
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
Ignored
STB ACO 1210 Data Register Format
1234567
910111213
14
15
0
8
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