Setra Systems Quick Count Operator's Manual page 23

If the scale displays " d-noS" , it may have been subjected to an
extreme discharge of static electricity or power line fluctuations. The
scale can be easily restored to operation by following the procedures
outlined in steps #4 and #5 above. Note, the user setups will be
restored to the original factory defaults.
If the RS-232 interface does not function correctly, first make certain
that you are using the correct RS-232 cable, and that it is securely
fastened to both the scale and the peripheral device. If data
transmission or reception is still not possible, be certain that both
the scale and peripheral device serial ports are set up correctly (baud
rate, parity, handshaking, etc.). See Appendix IV.
When communicating with certain types of devices, especially computers,
it may be necessary to " cross" the receive and transmit lines of the
interface. That is, the receive line of the scale must connect to the
transmit line of the external device. Likewise, the transmit line of the
scale must connect to the receive line of the external device. Special
cables can be purchased for this purpose from a computer dealer.
If the problem still persists, contact your local authorized Setra
dealer, refer to the Setra Quick Count Technician's Guide or consult
Appendix IX, " Limited Two-Year Scale Warranty," for more information.
To obtain a copy of the Setra Quick Count Technician's Guide contact
your local authorized Setra dealer.
Setra Quick Count™ Operator's Manual 21