Instruction manual

1070 072 163-101 (97.11) GB
DM254 / 255/ 120 Data Modules6-6
6.3.2 Control Flags
Data word D0 contains the control flags. The individual data bits carry
various default functions.
D0.0
Data bit D0.0 is set to HIGH (1) by the DIAG500E diagnostics module in
the event that a first-value error was entered. Subsequent to the read-out
of the first-value error, this data bit is reset by the BTSMADAP function
module. There exists a functional interrelation between data bits D0.0 and
D0.1.
D0.1
Data bit D0.1 controls the response to an occurring first-value error.
• D0.1 = 0 Default setting in BT-MADAP
The first-value error is always entered. If an unacknow-
ledged first-value error is stored in the data module, it
will be overwritten by the newly occurring first-value er-
ror.
• D0.1 = 1 User-defined setting
A new first-value error can be entered only if the ac-
knowledgement of a previous first-value error was ef-
fected by means of D0.0. If this is not the case, the new
first-value error will be lost.
D1.0
In the event that a first-value error is present, the bit is set to the value =
1
bin
by the DIAG500E diagnostics module. If no error is present, the bit is
reset automatically.
D1.2
In the event that status changes in the diagnosed conditions occur, or if a
fault message is coming and/or going, the bit assumes the value = 1
bin
for
the duration of one PLC cycle.