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Introduction
English, Revision 02, Date: 12.07.2011
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The serial output signal is a non-voltaic RS 232. Alternatively it is possible to use a
CAN bus. The positioning pulse is not galvanically separated but available as a +24 V
(20 mA) operational voltage switched output. Optional a 15 bit parallel output for the
code (24 Volt switched, non current limiting) can be effected.
Transponders may also be programmed. Therefore the transponder has to be located
within the antenna field at least 30 ms after starting the programming cycle.
1.2.1
Surveillance Of The Output Stage
The output stage is surveilled concerning the following errors:
-
capacity of oscillatory circuit, short circuit, idling, detuning
-
oscillator breakdown 128 kHz, frequency deviation
-
short-circuit transmitting conductor, idling
-
power transistor is defect
By this surveillance a certain probability of the function can be detected. Defective
contacts or ripped-off cables between interpreter and antenna are checked constant-
ly. A non-authorized change in parameters leads to the setting of a bit in the system
status (see also table 7 on page 19).
ATTENTION!
Also the crossing of a massive steel plate may possibly trigger
the surveillance!
After programming the transponder an error bit is set, as the surveillance circuit reacts
to the altitude modulation (AM) of the output stage, which is created for programming
the transponder. The error bit is deleted by a successful reference transponder test.
1.2.2
Switchable reference transponder in the antenna
It is recommended that in front of each starting and each change of driving direction
a reference transponder test is proceeded via a serial command. That way, the com-
plete function of the antenna and of the interpreter is checked cyclically. If the test has
been successful, a positioning pulse is put out.
1.2.3
Software Update (RS232)
Until up to 10 seconds after turning on the device, an update can be started by using
a special PC program without opening the system monitor. Additionally, there is a sub-
menu for the software update in the system monitor (see also chapter 5.3 on page 47).
In order to not disturb the PC update program by the permanent telegram output, the
output starts only 10 seconds after turning on the device.