ABB RTU500 series User Manual page 45

RTU500 series Remote Terminal Unit Test & Simulation
Inputs and Outputs view - elements of the user interface
Figure 52: Disconnecting signals in monitoring direction
Regarding the user interface, process information inputs (SPI, DPI, STI, AMI, DMI, MFI, BSI and
ITI) are shown in the signals grid without checkbox and "Simulate" button. Only when they are
disconnected from process, the button and checkbox appear, and the text in the row (signal type,
identifier and source) turns bold green.
Figure 53: Disconnection in monitoring direction (user interface)
Therefore, process information inputs whose text is bold green are signals which are disconnected
from process in monitoring direction. That is, these are signals which are being simulated, since their
current values do not correspond with the real physical values of those inputs.
Disconnecting signals in controlling direction
When a signal is disconnected from process in controlling direction, the RTU500 will block that
object's output commands, not sending them to the target local output board or sub-device. In
other words, the RTU500 blocks the physical execution of the output.
In the following example (Fig. 54), a SCO signal which belongs to a sub-device has been disconnect-
ed from process in controlling direction. Output commands sent by a host system to the SCO are
blocked by the RTU500 and not sent to the target-subdevice. Test Mode generates automatically a
ABB AG - 1KGT 150 924 V000 1 | 4-9