YSI IQ SensorNet Sensors Encoded Fieldbus Data - Manual (Page 4)

IQ S ENSOR N ET Sensors: Encoded Data for Fieldbus Communication
4 ba76073e01 01/2012
Sensor status
The sensor status is superior to the main and secondary measured
value of a sensor.
Code Status Meaning of the status
00h UNUSED_ID Sensor and sensor number are not available in the IQ S ENSOR N ET
system.
The measured value status of the main and secondary measured
value is MISSING (4h) (see section M
EASURED VALUE STATUS ).
The status UNUSED_ID is also transmitted if the fieldbus connector
(MIQ/(A-)PR or MIQ/(A-)MOD) fails to receive data from the
IQ S
ENSOR N ET Controller over a period of more than two minutes.
Possible reason: Interfered communication or controller failure.
Within the two minutes delay the transmitted last data remain frozen.
01h INACTIVE The sensor is currently inactive. The sensor number (ID) and respec-
tive setting dataset are available in the IQ S
ENSOR N ET system.
The sensor was removed from the IQ S ENSOR N ET system or the
communication does not work.
The measured value status of the main and secondary measured
values is MISSING (4h) (see section M
EASURED VALUE STATUS ).
The measured value display on the terminal indicates Init or Error.
02h MEASURE The sensor is in measuring mode.
The measured value status is VALID, OFL or INVALID.
The measured value display on the terminal indicates the valid mea-
sured value, OFL or "----" (invalid measured value).
When the measured value is analyzed, e.g. by a superordinate con-
trol technology, the sensor status and measured value status must
always be evaluated as well (see also section M
EASURED VALUE STA -
TUS ).
03h CALIBRATE The sensor is being calibrated. No measured value is available.
The measured value status of the main and secondary measured
values is MISSING (4h) (see section M
EASURED VALUE STATUS ).
The measured value display on the terminal indicates Cal.
04h ERROR The sensor is in severe fault mode.