YSI IQ SensorNet MIQ/A-PR Module - Manual (Page 23)

MIQ/(A-)PR Data transmission
23 ba76020e01 01/2012
4 Data transmission
4.1 Overview
Transmitted sensor data The following data for a sensor is transmitted to the PROFIBUS master
as a consistent data block:
 Sensor number (Sxx)
 Sensor status
 Sensor model
 Status info of sensors
 Measuring mode
 Measured value status (main and secondary measured value)
 Main measured value
 Secondary measured value
Note
The transmitted data of all IQ S
ENSOR N ET sensors is given in the YSI
document, "IQ S ENSOR N ET sensors: encoded data for field bus
communication" (ba76073e). It is permanently updated when new
sensors are available and when the sensor software is modified (if the
modifications are relevant for the transmitted sensor data). The latest
version is available on the Internet, in the download area for operating
manuals. Use the search function for the download and search for
"ba76073e".
4.2 Course of the data transmission
The basis for data transmission between the PROFIBUS master and
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. The sensor
numbers are assigned by the system in the order in which the sensors
are recognized by the system.
The sensor number (Sxx) is the identification for a sensor. The sensor
number is always transmitted in the first byte of the output and input
data. Thus the PROFIBUS master can clearly query data of individual
sensors.