Specifications

Analog Input Modules
142
31007715 6/2008
STB ACI 8320 Data and Status for the Process Image
Representing
the Analog
Input Data
The STB ACI 8320 sends a representation of the operating states of its input
channels to the NIM. The NIM stores this information in eight registers—four data
registers (one for each channel) and four status registers (one for each channel).
The information can be read by the fieldbus master or, if you are using a standard
NIM, by an HMI panel connected to the NIM’s CFG port.
The input data process image is part of a block of 4096 Modbus registers (in the
range 45392 through 49487) reserved in the NIM’s memory. The STB ACI 8320
module is represented by eight contiguous registers in this block, which appear in
the following order:
z 1st register = channel 1 data (16 bits)
z 2nd register = channel 1 status (8 bits)
z 3rd register = channel 2 data (16 bits)
z 4th register = channel 2 status (8 bits)
z 5th register = channel 3 data (16 bits)
z 6th register = channel 3 status (8 bits)
z 7th register = channel 4 data (16 bits)
z 8th register = channel 4 status (8 bits)
The specific registers used are based on the module’s physical location on the
island bus.
Note: When this module is used with the STB NCO 2212 or STB NCO 1010
CANopen NIMs, you must set the analog global interrupt enable to index 6423,
subindex 1 in order to receive the input data. For more information on analog global
interrupt enable, see the Advantys STB Standard CANopen Network Interface
Module Applications Guide (890 USE 176) or the Advantys STB Basic CANopen
Network Interface Module Applications Guide (890 USE 193).
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