Hardy HI 1756-2WS - Manual (Page 49)

Chapter 4 - Setup
4-21
The least significant 16 bits are a command for Chan-
nel 0, the next 16 bits are a command for Channel 1.
Commands are “1 shot”, occurring upon a 0-1 transi-
tion.
Bit 0x2000 in the STATUSWORD will be set upon
completion of the output table comand. Bit 0x4000
will also be set if the command failed. Setting the
command word to zero will clear these status bits.
Error Code List SUCCESS 0
OUTOFTOLERANCE -3
NOSUCHCMD -5
C2FAILNODEVS -6
C2FAILCAPEQ -7 (failure, capacities not
equal)
HARCALFAILCOUNTS -8 (failure, not enough
ADC counts between
high, low)
Timed Out
Commands The ASIC on the HI 1756-WS module requires that a
command receive a reply within 65 milliseconds.
This is not enough time to complete some of the com-
mands. The commands subject to time-out are:
• CALLOWCMD
• C2CALCMD
• WEIGHSYSTEST
• C2SEARCH
The reply to these commands is sent before the com-
mands are actually performed.
To see if a calibration has succeeded, the command
“GETSTATUS” can be sent
The data returned by the WEIGHSYSTEST and
C2SEARCH commands is actually the data deter-
mined by an earlier command. In practice, these com-
mands need to be sent twice.
Return Codes See Chapter 7, Troubleshooting.