Specifications

Analog Input Modules
62
31007715 6/2008
Offset and RTP:
The offset parameter is represented as a signed 16-bit number. To access it using
RTP, write the following values to the RTP request block:
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:
Determining
Offset and
Maximum
Count Values
To calibrate offset and maximum count for an analog channel:
Length 2
Index (low byte) 0x00
Index (high byte) 0x24
Sub-index 1 for channel 1
2 for channel 2
Data Bytes 2 (high byte) & 1 (low byte) -8191 to +8191
Length 2
Index (low byte) 0x01
Index (high byte) 0x24
Sub-index 1 for channel 1
2 for channel 2
Data Bytes 2 (high byte) & 1 (low byte) 23800 to 32767
Step Action Result
1 Connect the Advantys configuration
software to a physical island.
The software will be in online mode.
2 Double-click on the appropriate
STB AVI 1270 module in the island
editor.
The module editor for the selected
STB AVI 1270 module will open.
3 Open the I/O Data Animation sheet,
which can be accessed from the module
editor in the Advantys configuration
software when it is online.
4 Apply 0 V 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, then no offset adjustment is
necessary. If the data value is not 0, make a
note of it.
5 Now apply 10 V 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. If this is true, then no maximum
count adjustment is necessary. If the data
value is not 32 000, make a note of it.
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