7 Block OUTPUTS Device Functions Proline Promass 83 MODBUS RS485
88 Endress+Hauser
MEASURING
MODE
MODBUS register:
Data type:
Access:
4246
3245
Integer
read/write
! Note!
Function is not available unless STATUS was selected in the OPERATION MODE
function (4200) and the status output was assigned a limit value.
Use this function to define the measuring mode for the status output.
Options:
0 = STANDARD
The status output signal switches at the defined switch points.
1 = SYMMETRY
The status output signal switches at the defined switch points, irrespective of the
sign. If you define a switch point with a positive sign, the status output signal
switches as soon as the value is reached in the negative direction (negative sign),
(see illustration).
Factory setting: STANDARD
A0001247
Fig. 30 : Example for the SYMMETRY measuring mode
Switch-on point Q = 4
Switch-off point Q = 10
m = Status output switched on (conductive)
n = Status output switched off (nonconductive)
! Note!
• SYMMETRY cannot be selected unless the values in the ON-VALUE (4242)
and OFF-VALUE (4244) functions have the same sign or one of the values is
zero.
• If the values have different signs, SYMMETRY cannot be selected and an
“ASSIGNMENT NOT POSSIBLE” message is displayed.
TIME CONSTANT
MODBUS register:
Data type:
Access:
4247
3246
Float
read/write
! Note!
Function is not available unless the STATUS setting was selected in the
OPERATION MODE function (4200).
Entering a time constant defines how the measuring signal reacts to severely
fluctuating measured variables, either very quickly (enter a low time constant) or
with damping (enter a high time constant). Damping acts on the measuring signal
before the switch status changes, and consequently before switch-on or switch-off
delay is activated. The purpose of damping, therefore, is to prevent the status
output changing state continuously in response to fluctuations in flow.
User input:
fixed-point number 0.00 to 100.00 s
Factory setting:
0.00 s
Function description
OUTPUTS → PULSE/FREQUENCY OUTPUT 1 → CONFIGURATION (STATUS)
0
-4
-10
4
10
Q
t
➀
➀➁➀➁ ➀
To Next Page
Loading...
