Endress+Hauser Proline Promass 80 - Device status; Error messages; Byte Bit Error No. Short error description

Device Functions Proline Promass 80 11 Group STATUS OUTPUT
Endress+Hauser 43
11.1 Information on the response of the status output
General
If you have configured the status output for “LIMIT” or “FLOW DIRECTION”, you can define the
requisite switching points in the ON-VALUE and OFF-VALUE functions. When the measured
variable in question reaches one of these predefined values, the status output signal switches as
shown in the illustrations below.
Status output configured for direction of flow
The value you entered in the ON-VALUE function defines the switching points for the positive and
negative directions of flow.
If, for example, the switching point you define is = 1 kg/h, the status output is not conductive at
–1 kg/h and is conductive at +1 kg/h. Set the switching point to 0 if your process calls for direct
switchover (no switching hysteresis). If low flow cut off is used, it is advisable to set hysteresis to a
value greater than or equal to the low flow cut off rate.
Switch-off / switch-on point
A0001236
a = Status output conductive
b = Status output not conductive
Status output configured for limit value
The status output signal switches as soon as the measured variable falls below or exceeds a defined
switching point.
Application: Monitoring flow or process-related boundary conditions.
Measured variable
A0001235m
m = Switch-off point, n = switch-on point, o = relay de-energized
A Maximum security (SWITCH-OFF POINT > SWITCH-ON POINT)
B Minimum security (SWITCH-OFF POINT < SWITCH-ON POINT)
C Minimum security (SWITCH-OFF POINT = SWITCH-ON POINT, this configuration should be avoided)
-1 0 +1
a
b
-Q Q
t
oo
nn
m
o
n
m
AB C
m