YSI IQ S ENSOR N ET Field bus linking - Manual (Page 21)

IQ S ENSOR N ET Field bus linking Configuring the IQ S ENSOR N ET
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The PLC does not
contain any plausible
input data
3.6 Assigning the sensor numbers
The basis for data transmission between the superordinate control sys-
tem (PLC) and the IQ S
ENSOR N ET is formed by the unique assignment
of a sensor to its sensor number (Sxx) in the IQ S ENSOR N ET system.
During the initial commissioning, the sensor numbers are assigned by
the system in the order in which the sensors are recognized by the sys-
tem.
Preparation of the IQ S
ENSOR
N
ET
for communication with a field bus
may require, e.g. the following:

Creating an IQ S ENSOR N ET system with specific assignment of sen-
sor numbers to sensors
 Creating several IQ S
ENSOR
N
ET
systems with the identical assign-
ment of sensor numbers to sensors
 Changing the order of the sensors in an already installed system
Creating the assignment
of sensor numbers
You want to install an IQ S ENSOR N ET system and, at the same time, to
create a specific sequence of sensor number assignments to the sen-
sors.
– Wrong setting in the
router/switch
– Correct the settings
– Blocking by firewall – Contact your network adminis-
trator or a network specialist
Cause Remedy
Cause Remedy
– Input data and output data
are not consistent
– When programming the PLC,
define input data and output
data as consistent over the
entire data length
– The data interpretation of the
PLC is not correct
– Heed the data formats of the
IQ S ENSOR N ET (see also sec-
tion 4.1.3).
– Observe the data alignment of
the PLC data representation. If
necessary, exchange the
high-order and low-order bytes
word by word