Operating Modes
Leuze electronic
APG-02
15
T
N
T
35/
7-
24V
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7.2.3 Read IO-code
If the Read IO-code mode is switched on by pressing the MODE button, the display shows the
IO-code of the activated slave. It is not possible to change this value.
7.2.4 Read and Write Data
A special feature of this operating mode is that the AS-Interface supply voltage is not switched
off following the read or write operation. As a result, output data which have been written are
retained until the operating mode is changed or the connection between the AS-Interface-
Handheld and the AS-Interface slave is interrupted. Please note that this operating mode
places a large load on the battery.
First activate the slave from which you would like to read data or the slave to which you would
like to write data.
To switch on the
read and write data
mode, press the button MODE until DATA appears in the
display. When this mode is switched on, the current input data are read in and displayed in the
upper-right corner of the display. In addition, the RD display appears, indicating that the data
are read data.
To write data, use the
or
button to set the desired value. When one of the two buttons
is first pressed, the RD display is extinguished.
Upon pressing the PRG button, the data are transmitted once to the slave and the WR display
appears in the display. If the PRG button is held pressed, data are transmitted to the slave until
the button is released.
This operating mode is for test purposes only. It is not possible to over-
write the output data of the primary controller.
The AS-Interface-Handheld transmits data as long as the PRG or ADR
button is pressed.
Many AS-Interface products have an integrated watchdog, i. e. if no
AS-Interface telegram is received from the subscriber after a predefined
period of time, the output is switched to the safe (power-free) state. It is,
thus, possible that the set outputs are reset at the same time as the
PRG or ADR button is released.
