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1070 080 067-101 (2001.03) GB
PSI 6XXX.350 L1
NOTE
A <Pressure calibration> operation will change the value of the conversion factor
entered previously. Do not change the new value by any subsequent data entry.
NOTE
A <Pressure calibration> operation will change the value of the zero adjust entered
previously. Do not change the new value by any subsequent data entry.
<Pressure calibration> involves the re-determination of 3 values: maximum pressure,
conversion factor and zero adjust. These values are shown in the Basic Setup - Electrode
Setup window in the BOS.
You can view the results of the last scaling operation for the respective electrode in the
"Scaling Results" window under "Electrode Setup" in the BOS.
The lower and the upper command pressure values are entered as a percentage of 10V,
or, respectively, as a digital value of 255 (8 bits). Their default values are 40% and 80%.
You can change these values only by some intermediate programming. Go to the BOS
interface and select <Pressure calibration>. Next, some proposed command values
are displayed. You can overwrite them and save your entries. Now you may cancel
<Pressure calibration> "manually". The command values you have just entered for the
respective electrode are saved.
If an error occurs:
If an error of any type occurs during <Pressure calibration>, the calibration operation
will be aborted, the <Ready> signal reset and an error message transmitted. The error
message transmitted will always relate to a weld fault. If the abort was caused by some
other type of error, also a welding process error message will be transmitted neverthe-
less. No <Pressure calibration/check finished> signal will be transmitted. What is un-
usual here is the way in which a fault is reset. The <Fault reset with WC> signal indicates
that the fault is reset. Subsequently, however, the signal that is actually output is not the
<WC> signal but instead the <Pressure calibration/check finished> signal. If the
<Fault reset with reweld > signal is output while the <Pressure calibration> signal is
still high, the <WC> signal is set and another pressure calibration operation will be started
right away. Otherwise, the timer will now be in normal "Weld timer ready" state. Typical
errors as they may occur during pressure calibration operations are described under "Er-
ror Messages".
Electrical connection
7-33
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