uniphy Phyaction 740 Series, Информация о сервисе

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Service Information Phyaction 740 & 790-series Page 26
THE PROCESSOR HAS DETECTED AN ERROR
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Error number : 43
Error code : 0
Error value : 0040h
Error address : 1EF4h
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CHAPTER 5
TROUBLE SHOOTING
5
.1 Introduction
In this chapter a description is given of the most common error messages and their probable cause.
The following categories of errors are identified:
- Errors during selftest
- Errors during normal use
- Software errors
With a number of errors a special message is displayed explaining in short what the detected problem is.
All other errors are displayed in the following manner (the numbers are just an example and change per
error):
The error numbers, on the line indicated by "Error number:" are described in paragraph 5.4 and 5.5. The
numbers at the "Error code:" and "Error value:" lines give in some occasions additional information about
the error. The hexadecimal number on the line "Error address:" indicates the program counter position at
the occurrence of the error. This is important in case of software errors. In cases the display is (probably)
not available the processor will activate the buzzer a number of times, description also later in this
chapter.
The selftest checks proper functioning of the safety relay and circuits and is activated every time the unit
is switched on. The tests are performed by the microprocessor and lasts for approximately 3 seconds.
The current dosage regulator should be in the zero position (maximum counter clock wise). This is
checked at regular intervals during the selftest. If the dosage regulator is not at zero an error will be
reported (
ERROR 50 ) and an error shutdown procedure will be initiated as described below.
The safety relay driver circuitry is accessible to the microprocessor for 3 seconds after power up of the
unit. After this period the microprocessor will not be able to switch the safety relay on any more. The
control lines used for test purpose only are only accessible by the microprocessor if the dosage regulator
is in the zero position as extra precaution against hard- or software errors.