Toshiba Tosvert VF-MB1/S15 - Manual (Page 9)

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2.2. Status indicator
The PDP003Z has two LEDs, ST (status) and DX (data exchange) to indicate the
statuses of PROFIBUS-DP and the PDP003Z itself.
ST (Status):
Red LED
LED Meanings
Off No diagnostics present
Flashes
8 Hz (Blinking 4 times/1sec.):
Waiting for parameterization or configuration
2 Hz (Blinking 1 times/1sec.):
PDP003Z station address is "126".
(Refer to 2.3 section .)
Lights
DP status error
* For example, a station address is not setcorrectly.
DX (Data exchange):
Green LED.
Indicates the status of the PROFIBUS network.
It lights when the PDP003Z is on-line and data exchange is possible.
ST (status)
DX (data Exchange)