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7SR157 Technical Manual
1.2 Operation Guide
1.2.1
User Interface Operation
The basic menu structure flow diagram is shown in Figure 1-1. This diagram shows the main modes of display:
Settings Mode, Instrument Mode, and Fault Data Mode.
When the relay leaves the factory all data storage areas are cleared and the settings set to default as specified in
settings document.
When the relay is first energised the user is presented with the following message:
On first boot-up of the relay, the LCD will display the relay identifier screen. On every subsequent power-on,
whichever screen was last viewed will be displayed.
The push-buttons on the fascia are used to display and edit the relay settings via the LCD. They are also used to
display and activate the control segment of the relay, to display the relays instrumentation and Fault data and to
reset the output relays and LEDs.
The five push-buttons have the following functions:
READ DOWN
These are used to navigate the menu structure.
ENTER
The ENTER push-button is used to initiate and accept setting changes.
When a setting is displayed, pressing the ENTER key will enter the edit mode. The setting will flash and can now
be changed using the▲ or ▼ buttons. When the required value is displayed the ENTER button is pressed again
to accept the change.
When an instrument is displayed, pressing ENTER will toggle the instruments favourite screen status.
CANCEL
This push-button is used to return the relay display to its initial status or move one level up in the menu structure.
Pressed repeatedly will return to the relay identifier screen. It is also used to reject any alterations to a setting
while in the edit mode.
TEST/RESET
Chapter 2 - Page 4 of 14
7SR157
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ENTER to CONTROL
Figure 1-3 Relay Identifier Screen
READ UP
© 2016 Siemens Protection Devices Limited
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