7 Block OUTPUTS Device Functions Proline Promass 83 MODBUS RS485
78 Endress+Hauser
TIME CONSTANT
MODBUS register:
Data type:
Access:
4208
3213
Float
read/write
! Note!
Function is not available unless the FREQUENCY setting was selected in the
OPERATION MODE function (4200).
Entering a time constant defines how the frequency output signal reacts to
severely fluctuating measured variables, either very quickly (enter a low time
constant) or with damping (enter a high time constant).
User input: fixed-point number 0.00 to 100.00 s
Factory setting: 0.00 s
FAILSAFE MODE
MODBUS register:
Data type:
Access:
4209
3215
Integer
read/write
! Note!
Function is not available unless the FREQUENCY setting was selected in the
OPERATION MODE function (4200).
For safety reasons it is advisable to ensure that the frequency output assumes a
predefined state in the event of a fault. The setting you select here affects only the
frequency output. It has no effect on other outputs and the display (e.g. totalizers).
Options:
0 = FALLBACK VALUE
Output is 0 Hz.
1 = FAILSAFE VALUE
Output is the frequency specified in the FAILSAFE VALUE function (4211).
2 = HOLD VALUE
Measuring value output is based on the last measuring value saved before the
error occurred.
3 = ACTUAL VALUE
Measured value output is based on the current flow measurement. The fault is
ignored.
Factory setting: FALLBACK VALUE
FAILSAFE VALUE
MODBUS register:
Data type:
Access:
4211
3216
Float
read/write
! Note!
Function is not available unless FREQUENCY was selected in the
OPERATION MODE function (4200) and FAILSAFE VALUE was selected
in the FAILSAFE MODE function (4209).
For specifying the frequency that the measuring device outputs in the event of an
error.
User input: max. 5-digit number: 0 to 12500 Hz
Factory setting: 12500 Hz
Function description
OUTPUTS → PULSE/FREQUENCY OUTPUT 1 → CONFIGURATION (FREQUENCY)
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