Handling with VIPA data handling blocks Manual BG41/BG42/BG43
4-66 Rev. 99/49
ZDBN
If the target type DB is selected, the DBNR is to be entered into the right byte.
Valid area: 2...255. The receiver examines the parameters, if DB, DX are
available with a valid DB, DX number.
ZBWN
Byte/word number. By means of these operands it is determined, from which
word, e.g. data word of the given DB, or from which byte, e.g. AB, a received
telegram should be filed. The receiver of the telegram undertakes this
examination.
KOOR
The usage of coordination flags is parametrized. In a high byte the byte number of
the coordination flag must be parametrized and in a low byte its bit number must
be parametrized. If no coordination flags are used, a value of 255 in high and low
byte is to be entered.
Access to the target area is controlled with a coordination flag: If the receiver of
the data recognizes that the given coordination flag is set at 1, then the data from
the data handling block SEND will not be accepted. The error 50 (target area
blocked) is sent back instead.
If the receiver of the data recognizes that the area is free to write into
(coordination flag at 0) he accepts the data and subsequently sets the coordination
flag. The flag remains set for as long as the user program has analysed the
incoming data and has reset the flag.
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