5.4.8 Logical inputs
Logical inputs are binary signals that a user can control manually to change the behavior of the
AQ-200 unit or to give direct control commands. Logical inputs can be controlled with a virtual switch
built in the mimic and from a SCADA system (IEC 61850, Modbus, IEC 101, etc.). Logical inputs are
volatile signals: their status will always return to "0" when the AQ-200 device is rebooted.
Logical inputs have two modes available: Hold and Pulse. When a logical input which has been set to
"Hold" mode is controlled to "1", the input will switch to status "1" and it stays in that status until it is
given a control command to go to status "0" or until the device is rebooted. When a logical input which
has been set to "Pulse" mode is controlled to "1", the input will switch to status "1" and return back to "0"
after 5 ms.
The figure below presents the operation of a logical input in Hold mode and in Pulse mode.
Figure. 5.4.8 - 117. Operation of logical input in "Hold" and "Pulse" modes.
A logical input pulse can also be extended by connecting a DELAY-low gate to a logical output, as has
been done in the example figure below.
Figure. 5.4.8 - 118. Extending a logical input pulse.
A
AQ
Q-F201
-F201
Instruction manual
Version: 2.04
162
Содержание AQ-F201
Страница 1: ...AQ F201 Overcurrent and Earth fault relay Instruction manual ...
Страница 220: ...Figure 7 4 146 Example block scheme A AQ Q F201 F201 Instruction manual Version 2 04 219 ...
Страница 226: ...Figure 8 4 151 Device installation A AQ Q F201 F201 Instruction manual Version 2 04 225 ...
Страница 227: ...Figure 8 4 152 Panel cutout dimensions and device spacing A AQ Q F201 F201 Instruction manual Version 2 04 226 ...