B&B Electronics MODSCAN32 - Manual - Manual (Page 34)

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Display Options
The Display Options menu offers the following commands:
Show Data
This default view configuration displays data values as obtained from the modbus
slave device. ModScan is normally configured to display modbus data points in
the lower splitter view of the associated document. Data points are displayed in
order from top to bottom, left to right. Data is displayed using the current colors
and font selection. Coil values are displayed as either <0> or <1>. Register
values may be displayed in a variety of formats according to your preferences.
Show Traffic This option allows the serial data stream to be displayed in place of the data
points. Use this command to troubleshoot the connection to a particular modbus
device. When selected, this option will display the serial data exchanged
between the ModScan application and the slave device associated with this
document. The data display splitter view will show data transmitted to the slave
device and data returned from the slave device as communications occur during
the normal polling cycle. This will help to isolate a problem with possible
misinterpretation of the modbus protocol. Data will be displayed in either
decimal or hex, depending upon the preference settings in effect for viewing the
modbus data points. Normal data collection, (if enabled), will continue.
Binary Register values are displayed as 16 discrete bits. Use this command to display the
contents of modbus registers as a group of 16 discrete values as shown below:
41000: <0001000100110100>
This example shows the HOLDING REGISTER located at address 1000 to
contain the value 1134H.
Decimal Register values are displayed in decimal format, (-32767-32768).
Hex Register Values are displayed in Hexadecimal, (0000-ffff).
Floating Point Register Values are displayed in floating point notation, (two registers are
required). Use this command to display the contents of modbus registers as
floating point values based on interpretation of two consecutive registers, (32-
bits), according to the IEEE specification. ModScan will attempt to convert the
values contained within the selected registers as the IEEE value. If the bit pattern
contained within the register set matches the criteria for a floating point number,
the value will be displayed on the lower document splitter view as a decimal
value associated with the first register address of the pair.
Swapped FP Register Values are displayed in floating point notation, (least significant register
first). Use this command to display the contents of modbus registers as floating
point values based on interpretation of two consecutive registers, (32-bits),
according to the IEEE specification. ModScan will attempt to convert the values
contained within the selected registers as the IEEE value. If the bit pattern
contained within the register set matches the criteria for a floating point number,
the value will be displayed on the lower document splitter view as a decimal
value associated with the first register address of the pair. The difference
between this option and the normal Floating Pt display option is the order of the
registers with respect to the IEEE standard.
Dbl Float Register Values are displayed in floating point notation, (four registers, (64 bits),
are required). Use this command to display the contents of modbus registers as
floating point values based on interpretation of four consecutive registers, (64-
bits), according to the IEEE specification for double-precision numbers.