Trouble-shooting
necessary, insulate the sensor and eliminate interference by using
shielded or twisted wiring.
Error:
´
CALEr
´
is displayed when the device is switched on.
Remedy:
The calibration of a measuring range may have become misad-
justed. The device must be recalibrated at the factory.
Error:
Data transmission via the interface does not function.
Remedy:
Check interface module, connections, and settings.
Are both devices set to the same baud rate and transmission
mode ?
Is the correct COM interface on the computer being addressed ?
To check the data flow and the handshake lines a small interface
tester with LEDs comes in very handy; (in ready-to-operate status
the data lines TXD, RXD carry negative potential of approx. -9V and
the LEDs light up green, whereas the handshake lines DSR, DTR,
RTS, CTS carry approx. +9V positive voltage and the LEDs light up
red. For the duration of data transmission the data LEDs should
flash red.
Check data transmission by means of a terminal (AMR-Control,
WIN-Control, WINDOWS-Terminal).
Address the device using its assigned device number´
Gxy
´ (see
Manual 6.2.1).
Enter <ctrl Q> for XON, if the device is in the XOFF status.
Check the programming by means of ´
P15
´ (see Manual 6.2.3).
Test the transmit line by selecting a measuring point using com-
mand ´
Mxx´
and check in the display.
Error:
Data transmission in the network does not function.
Remedy:
Check to ensure that all devices are set to different addresses.
Address all devices individually via the terminal using command
´
Gxy
´.
Addressed device is OK if at least ´
y CR
LF
´ is returned as echo.
If transmission is still not possible, unplug the networked devices.
Check all devices individually on the data cable to the computer;
(see above).
Check the wiring for short-circuit or crossed wires.
Are all network distributors supplied with power ?
Network the devices again one at a time and check successively
If, after performing the above-listed checks and remedial steps, the device still
fails to behave as described in the operating instructions, it must be returned to
our factory in Holzkirchen, accompanied by an explanatory note, error descrip-
tion, and if available test printouts. With the AMR-Control software you can
print out screen-shots with the relevant programming and save and / or print
out a comprehensive ´Function test´ in the device list or terminal operation.
ALMEMO
®
2450-1
27
