KROHNE BM 70 M - Manual (Page 58)

58 BM 70 M
Switching output characteristics
Switching function
settable by way of ... Further parameters
settable via ... Sw.output application
Examples see Sect. 8.5
Fct. 3.6.1
FUNCTION S Fct. 3.6.2
TYPE S Fct. 3.6.3
THRESHOLD Fct. 3.6.4
HYSTERESIS
Error message
Contact opens
when error occurs
ERROR OPEN no * no * no*
Contact closes
when error occurs ERROR
CLOSED no * no * no*
Limit value, level
- Contact closes when
upper limit exceeded
LEVEL HIGH yes yes
- Contact closes when
lower limit exceeded LEVEL LOW yes yes
Limit value, distance
- Contact closes when
upper limit exceeded
DISTANCE HIGH yes yes
- Contact closes when
lower limit exceeded DISTANCE LOW yes yes
Limit value, conversion
- Contact closes when
upper limit exceeded
CONVERSION HIGH yes yes
- Contact closes when
lower limit exceeded CONVERSION LOW yes yes
Limit value, reflection
- Contact closes when
upper limit exceeded
REFLECTION HIGH yes yes
- Contact closes when
lower limit exceeded REFLECTION LOW yes yes
e.g. operation indicator
Contact closed when
supply power applied
and open at power fail
OFF no * no * no *
* 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)
THRESHOLD
Fct 3.6.3
FUNCTION S:
Fct. 3.6.1 LEVEL
DISTANCE
CONVERSION
REFLECTION
Overflow
= Threshold + Hysteresis / 2
HYSTERESIS
Fct. 3.6.4
Underflow
= Threshold + Hysteresis / 2
TYPE S
Fct. 3.6.2
HIGH open closed open closed
LOW closed open closed open
Switching output