KROHNE BM 70 A Installation And Operating Instructions Manual page 54

Switching output
characteristics
Sw.output application
Examples
see Sect. 8.5
Error message
Contact opens
when error occurs
Contact closes
when error occurs
Limit value, level
- Contact closes when
upper limit exceeded
- Contact closes when
lower limit exceeded
Limit value, distance
- Contact closes when
upper limit exceeded
- Contact closes when
lower limit exceeded
Limit value, conversion
- Contact closes when
upper limit exceeded
- Contact closes when
lower limit exceeded
Limit value, reflection
- Contact closes when
upper limit exceeded
- Contact closes when
lower limit exceeded
e.g. operation indicator
Contact closed when
supply power applied
and open at power fail
Installation and operating instructions BM 70 A/P
FUNCTION S: LEVEL
Fct. 3.6.1 DISTANCE
CONVERSION
REFLECTION
THRESHOLD
Fct 3.6.3
TYPE S
Fct. 3.6.2
Switching output
HIGH
open closed
LOW closed open
Switching function
settable by way of ...
Fct. 3.6.1 Fct. 3.6.2
FUNCTION S TYPE S
ERROR
no *
OPEN
ERROR
no *
CLOSED
LEVEL HIGH
LEVEL LOW
DISTANCE HIGH
DISTANCE LOW
HIGH
CONVERSION
CONVERSION LOW
REFLECTION HIGH
REFLECTION LOW
OFF
no *
Overflow
= Threshold + Hysteresis / 2
HYSTERESIS
Fct. 3.6.4
Underflow
= Threshold + Hysteresis / 2
open closed
closed open
Further parameters
settable via ...
Fct. 3.6.3 Fct. 3.6.4
THRESHOLD HYSTERESIS
no * no*
no * no*
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
yes yes
no * no *
Page: 54
* Setting has no effect on the
function of the switching output!
Overflow =
Measured value higher than limit
value
(= threshold plus hysteresis / 2)
Underflow =
Measured value lower than limit
value
(= threshold minus hysteresis / 2)
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