ACU-RITE MILLPWR G2, Техническое руководство

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534 ACU-RITE Technical Manual MILLPWR
G2
Block Check
Character (BCC) The BCC is a block check character. The BCC is added to a transfer block to
simplify error detection. During the horizontal parity check and the cyclic block
check, block check characters are calculated and added to every transferred
data block. The appended BCC is compared with a second BCC that is calcu-
lated by the receiver. The comparison determines whether the transmission
was executed without error.
Use MP_bccAvoidCtrlChar to ensure that the BCC is not interpreted as a
control character.
On the control, numbers less than $20 are defined as control characters. If cal-
culation of the BCC produces a number less than $20, then a blank space is
sent in addition immediately before <ETB>. The BCC will consequently
always be greater than $20 and cannot therefore be interpreted as a control
character.
MP_bccAvoidCtrlChar
Block Check Character (BCC) is not a control character
Format: Selection menu
Selection:
[ TRUE ]
Ensures that the check sum does not correspond to a control
character.
[ FALSE ]
Function not active
Default: FALSE
Note
You can remove this parameter from your configuration if you do not use
blockwise data transfer.