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7.
APPENDICES
7.1. ERROR INDICATIONS AND MESSAGES
When an erroneous operation is attempted, an error indication will occur to advise the
user. If the IEEE Interface Bus is used, the error messages can be read out as well.
Error indications can occur in the following ways:
a) By flashing a front panel control key LED to indicate what has happened. For exam-
ple, the Compressor "Safety Limits" LED will flash and the appropriate limit will be
displayed when a safety error occurs.
b) By indicating "Err. XNNN" on the LED frequency display. "X" may be a blank or one
of the following letters: C, E, H, L, U or P. "N" may be a blank or a digit.
c) By flashing of the Entry Disabled LED, if a change of parameter is attempted when
it is not allowed.
Error messages are always output as: "Error YMMM". "Y" may be a blank or one of the
letters: C, E, H, L, U or P. "M" is a digit, 0 to 9.
Table
7.1
and
7.2,
given at the end of this chapter, list all the error codes. The error
codes are grouped according to their origin:
1.
Error nos. lower than
1
00.
These originate from the IEEE interface. For many of these codes, a
letter preceeds the number to give further explanation of the error.
These letters have the following meanings:
2. Error no. 1 00.
C:
The input character data may not be used.
E:
The exponent of the input data is outside the limit i.e.
<
-9
or
>
+9.
H:
The input command may not be executed (e.g. because the 1050 is
in "Operate").
L:
The input data is below the lower limit for the associated parame-
ter and has been adjusted to the limiting value.
U:
The input data is above the upper limit for the associated parame-
ter and has been adjusted to the limiting value.
P:
The input parameter number does not fit the needs of the associ-
ated header.
This error is displayed, when the 1 050 is switched on, if there has been
a change in any of the stored front panel test set-ups. This can be
caused by the memory battery discharging due to a lack of recent use.
67
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