Cyclic exchange of data
The cyclic exchange of useful data is carried
out with the function
Data_Exchange.
The
output data
for valve terminals are trans-
ferred with this function as an octet
string of length x.
The octet string length is determined by the
number of identifier bytes.
PLEASE NOTE
With the function "Data_Exchange", the valve
terminal expects the output information for the
valves and the electrical outputs.
The input information + the status bits are
sent as reply telegram to the master.
Due to the modular character of the valve ter-
minal, the useful data telegrams may be of dif-
ferent lengths.
Parameter summary (Data_Exchange):
Octet 1:
I/O data byte_1
Bit 0: input/output x
Bit 1: input/output x+1
Bit 2: input/output x+2
Bit 3: input/output x+3
Bit 4: input/output x+4
Bit 5: input/output x+5
Bit 6: input/output x+6
Bit 7: input/output x+7
Octet 2:
I/O data byte_2
Bit 0: input/output x+8
Bit 1: input/output x+9
* * *
Bit 7: input/output x+15
VIFB13 - 03/05 4. Commissioning
9701 NH 4-51
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