KEYENCE KV-D20 - Manual (Page 22)

2. Overview and Operation
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Beep function
The KV-D20 features a beep function to provide an audio signal for workers.
The beep sounds while special utility relay 2511 is turned on.
Key-lock function
The key-lock function is used to lock the display screen.
When the key-lock function is set, the current screen is locked regardless of the
display screen mode or status.
To set or reset the key-lock function, press the and
▲ ( ▼ ) keys simultaneously
for three seconds.
The key-lock setting is retained even when the KV-D20 is turned off once and on
again.
Screen retention function
When the KV-D20 is turned on again, it shows the last screen displayed before the
power was turned off.
However, the decimal/hexadecimal notation setting in device mode is not retained.
Decimal notation is used when the KV-D20 is turned on again.
Note 1: The status of the KV-D20 is retained by the KV unit.
Note 2: The status of the KV-D20 is retained only for the memory backup period of
the KV unit.
Note 3: To retain the status longer, select "SAVE" in the system mode of the
Access Window of the KV unit.
➮ Refer to "LOAD mode and SAVE mode" on page 4.
Screen change function
Setting special utility relay 2508 to "ON" enables switching between the operator
mode and the device mode. Setting special utility relay 2509 to "ON" enables
switching between the operator mode and the system mode.
Setting each bit of DM1676 to "ON" enables the screen change in the operator
mode. The initial setting (DM1676 = #00000) only allows switching between the
operator, switch comment, and lamp comment screens.
When changing the current mode (screen) is disabled during operation, the setting
becomes effective after the current mode (screen) is changed to another mode
(screen). To activate the setting immediately, turn on special utility relay 2513. The
mode is switched to the operator mode when the setting of special utility relays
2508 or 2509 is changed. The mode is switched to the next available mode when
the setting of data memory DM1676 is changed.
2511 is OFF.
Beep
2511 is ON.
Key-lock Key-unlock (reset)
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