KROHNE BM 70 A_P EN - Manual (Page 54)

Installation and operating instructions BM 70 A/P Page: 54 11/00
Switching output
characteristics
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
* 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)
Sw.output application
Examples Switching function
settable by way of ... Further parameters
settable via ...
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 *