Specifications

Analog Input Modules
31007715 6/2008 91
Maximum Count and RTP:
The maximum count parameter is represented as a signed 16-bit number. To
access it using RTP, write the following values to the RTP request block:
Applying Offset
and Maximum
Count Values
To apply offset and maximum count to an analog channel:
Length 2
Index (low byte) 0x01
Index (high byte) 0x24
Sub-index 1 for channel 1
2 for channel 2
3 for channel 3
4 for channel 4
Data Bytes 2 (high byte) & 1 (low byte) 31 233 to 32 767 (0x7A01 to 0x7FFF)
Step Action Result
1 Connect the Advantys configuration
software to a physical island.
The software will be in online mode.
2 Double-click the appropriate STB ACI 0320
module in the island editor.
The module editor for the selected
STB ACI 0320 module will open.
3 Open the I/O Data Animation sheet from
either from the Online drop down menu or
the I/O Image Animation button on the
Island toolbar.
4 Apply 4 mA to the appropriate field sensor
and read the analog input channel’s data in
the I/O Data Animation sheet.
Ideally, the channel data should read 0.
If this is true, no offset adjustment is
needed. If the data value is not 0, make
a note of the actual data value.
5 Now apply 20 mA to the field sensor and
read the analog input channel’s data in the
module’s I/O Data Animation sheet.
Ideally, the channel data should read
32 000 for signed input data or 64 000
for unsigned input data. If this is true, no
maximum count adjustment is needed. If
the data value is different, make a note
of the actual data value.
6 If adjustments need to be made, take the
Advantys configuration software offline.
7 Open the Properties sheet in the module
editor. In the Offset value field, enter the
data value that you read in step 4. In the
Max. Count value field, enter the data value
that you read in step 5.
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