YSI IQ SensorNet MIQ/A-PR Module - Manual (Page 21)

MIQ/(A-)PR Interface for the PROFIBUS
21 ba76020e01 01/2012
 Is it guaranteed that the PROFIBUS master has consistent access
to the 16 byte sensor data structure?
Note for Siemens PLC with programming language STEP7:
The following commands have to be used for consistent access:
– SFC15 (for writing)
– SFC14 (for reading)
 After commissioning:
Do all devices signal error-free behavior?
3.6 Sensor administration under PROFIBUS
Preparation of the IQ S ENSOR N ET for communication with the
PROFIBUS may require, e.g. the following:
 Creating an IQ S
ENSOR N ET system with specific assignment of
sensor numbers to sensors (see section 3.6.1)
 Creating several IQ S
ENSOR N ET systems with the identical
assignment of sensor numbers to sensors (see section 3.6.2)
 Changing the order of the sensors in an already installed system
(see section 3.6.3)
3.6.1 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
sensors.
1 Carry out a system start without any sensors (see System
operating manual, chapter Installation).
2 Connect the sensors to the system in the required order. For
each sensor, wait until the sensor is recognized by the system
(see System operating manual, chapter Installation).