Specifications

Analog Input Modules

31007715 6/2008

Averaging You may apply a filter that will smooth the values of the analog inputs reported by

the STB ACI 0320. The Advantys configuration software allows you to average over

a specified number of samples. Averaging is applied on a per-channel basis.

By default, the number samples averaged is one (no averaging); you may have a

filtering average over up to 80 samples. To configure an averaging sample:

This parameter is represented as an unsigned 8-bit number. To access this

parameter using RTP, write the following values to the RTP request block:

Channel

Operation

(Enable/Disable)

The STB ACI 0320 has an input channel enable/disable on a per-channel basis.

You can disable the unused inputs. By default, all inputs are enabled upon auto

configuration. When you disable a channel, its input is set to minimum input current.

The status byte and channel data return all zeros when the channel is disabled, and

the fault indicator does not blink.

z channel enable (default)

z channel disable

8 Save the new configuration parameters. When the configuration is downloaded

to the physical island, the new offset and

maximum count parameters are applied

to the analog input channel and your 4

and 20 mA readings should be 0 and

32 000, respectively.

Step Action Result

1 Double click the STB ACI 0320 module

you want to configure in the island editor.

The selected STB ACI 0320 module

opens in the software module editor.

2 In the Value column of the Averaging

row, enter a decimal or hexadecimal value

in the range 1 to 80 (0x50).

When you select the Averaging value,

the max/min values of the range appear

at the bottom of the module editor screen.

Length 1

Index (low byte) 0x02

Index (high byte) 0x24

Sub-index 1 for channel 1

2 for channel 2

3 for channel 3

4 for channel 4

Data Byte 1 1 to 80 (0x01 to 0x50)

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