ABB RTU500 series User Manual page 42

Test & Simulation
Inputs and Outputs view - elements of the user interface
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– Value:
This column displays the value with which the signal is transmitted. For signals whose values
are predefined (SPI, DPI, SCO, DCO and RCO), the value is represented as the selected option
of a drop list. In contrast, for signals whose values are integers (ITI and STI), natural numbers
(BSI and BSO), normalized percentages (AMI, DMI, ASO and DSO) or floating-point numbers
(MFI and FSO), the value is contained in an input box.
The qualifiers that accompany the value of a signal can be observed and/or set by right clicking
on the cell where the value is contained. After the right click, a dialog is prompted with the cur-
rent qualifiers, and the user has the possibility of changing them (Fig. 44).
Figure 44: Qualifiers (right click on the Value column)
The gray drop list at the bottom of the column is similar to the ones in the two previous columns. It
has no effect on the input boxes contained in the column; it only affects the drop lists.
The two final columns contain the elements that trigger the simulation of signals: the next to last
column includes buttons to force the simulation, while the last column contains a checkbox for each
row to enable multiple sequential forcing.
Note that the simulate button and checkbox for input signals (SPI, DPI, STI, AMI, DMI, MFI, BSI and
ITI) are not visible until these signals are disconnected from process (see Chapter , "Disconnecting
signals in monitoring direction").
On the other hand, the simulation buttons and checkbox for output commands (SCO, DCO, RCO,
ASO, DSO, FSO and BSO) are always visible. These output signals possess two simulation buttons:
"Se" (to perform a command selection) and "Ex" (to perform a command execution). The buttons
also signalize the status of the command (selection or execution) by means of bold letters. For
example, in Fig. 45, the first command is an execution, while the second is a selection.
Figure 45: Selection - Execution
To simulate an input signal or to send an output command, the user has just to click on the "Simulate"
or "Se"/"Ex" button in the row of the appropriated signal. A green flash in the row confirms that the
signal has been forced into the RTU and transmitted to the host systems (Fig. 46). In fact, each time
that a spontaneous change happens in a signal, the green flash appears in the row and the value
and cause of transmission fields are updated.
RTU500 series Remote Terminal Unit