Switch-Point Function - Endress+Hauser Flowphant T DTT31 Technical Information

DTT31, DTT35
Remote operation
via PC
Endress+Hauser
Function group Function (display)
Simulation: • Simulation 1 (SIM)
analog output version - switch output
(4 to 20 mA) • Simulation 2 (SIMA)
- analog output

Switch-point function

• Hysteresis function
The hysteresis function enables two-point control
via a hysteresis. Depending on the flow, the
hysteresis can be set via the switch point SP and
the switch-back point RSP.
• NO contact or NC contact.
This switch function is freely selectable.
• Delay times for switch point SP and switch-back
point can be set in increments of 1 s. By this
means undesirable temperature peaks of short
duration or of high frequency can be filtered out.
Operation, visualization and maintenance with PC and PC configuration software ReadWin 2000 or
FieldCare.
1
Operation, visualization and maintenance with PC and configuration software.
Item 1: PC with ReadWin 2000 or FieldCare configuration software
Item 2: TXU10-AA or FXA291 configuration kit (see "accessories")
Item 3: Flow switch
In addition to the operating options listed in the previous "Onsite operation" section, the ReadWin 2000
configuration software or FieldCare provides further information on the Flowphant T:
Function group Function (display)
SERV Switching processes 1
(service functions) Switching processes 2,
optional
Description
• Simulation switch output 1: on/off with display
• Simulation values for analog output in mA.
%
SP
RSP
1
0
1
0
Hysteresis function,
m
SP switch point; RSP switch-back point
2 3
Description
Number of changes in switching status for
switch output 1; optionally switch output 2
1
t
2
3
A0005280
NO contact, NC contact
n o
A0008072
15