Qualitrol INFORMA PMD-A, Руководство пользователя, Страница: 38 / 248

Components and Specifications
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The Channel Check mode is terminated and moved to the default state when:
• The Enter key is pressed, or
• After 5 minutes (fixed length timeout).
Channel Check Mode in 1 CPU Mode with LCD and 2 CPU Modes
The user can select the Channel Check mode menu option by using the LCD and the
keypad (refer to Figure 3.20).
In this mode, the user can observe the sub menu options as:
• Analog Inputs
• Digital Inputs
The Analog Inputs Check screen is editable for changing the channel numbers using the up
and down arrow keys. The screen displays the RMS magnitude and transformer ratio of the
selected channel. Alarm LEDs represent the phase error status of the selected channel.
For example, suppose Channel 1 is configured as phase A, Channel 2 is configured as
phase B, and Channel 3 is configured as phase C. If the user selects Channel 1, and if any
phase error occurs, then alarm LED will glow Red. For details, refer to the LED 6 indication
provided in the table in Section 3.6.6.
For standalone, the Phase error indication is not applicable.
The Digital inputs screen displays the state of the 64 digital channels. The user has to scroll
using the up and down arrow keys to check the state of all the 64 channels.
3.7. Shutdown and Reset
Pressing the reset or the shutdown switch when the device is running may lead to the loss of
data that is under acquisition. However, the data that is already available in the device will
not be affected.
3.7.1. Shutdown Switch
The INFORMA PMD-A device can be shut down gracefully by pressing the shutdown switch
for more than 3 seconds. After the device shuts down, the Healthy LED (on the front panel
of the device) stops glowing, indicating a successful shutdown. Now, the user can switch off
the power supply to the device.
Switching off the device without a graceful shutdown might corrupt the memory
device.
If the user releases the shutdown switch before 3 seconds, the device enters into the
Channel check mode (for details about the Channel check mode, refer to Section 3.6.6).
The shutdown switch is available on the motherboard/CPU. Refer to section 7.4.4.