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DIQ/S 181
Outputs
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ba77083e01 02/2015
Sensor messages include errors and information registered by the
sensor.
Special
sensor errors
The special sensor errors are sensor-dependent. Details of this are
given in the component operating manual of the respective sensor.
General
Sensor errors
6.4.4 Limit indicator
Function The characteristic of the limit indicator is laid down in the Limit value
UL , Limit value LL , Hysteresis UL and Hysteresis LL settings. The
fundamentals of the function are described in the introductory chapter
(see section 6.3.2).
In order to set up the
Limit indicator function for a relay output, the relay
output must be linked with the sensor (see section 6.2.1).
Settings
For monitoring functions, preferably set up the relay output
as an opener.
Init This can prompt a relay action for a short time,
depending on the starting behavior of the system
---- Invalid measured value, or defective sensor
Error Communication with sensor interrupted
OFL Measuring range undercut or exceeded (overflow)
Setting Selection/Values Explanation
Limit values UL main variable
LL main variable
UL adjoining var.
LL adjoining var.
Main variable
designates the actual
measured parameter
of the sensor (e.g. pH,
oxygen, etc.).
Adjoining variable
designates an
additional measured
parameter (e.g.
temperature).
Limit value UL within the measuring
range (sensor-
dependent) Any upper or lower lim-
iting value
Limit value LL
Hysteresis UL 0 - 10 % of the
measuring range Hysteresis for upper or
lower limiting value
Hysteresis LL