Endress+Hauser iTEMP TMT84 - Page 59

TMT84 11 Operation using PROFIBUS
®
PA
Endress + Hauser 59
Measuring type n read/
write
Displays the calculation process for Primary Value 1.
Options:
Sensor Transducer 1 (Measuring mode 1):
• PV = SV1: Secondary value 1
• PV = SV1-SV2: Difference
• PV = 0.5 x (SV1+SV2): Average
• PV = 0.5 x (SV1+SV2) redundancy: Average or Sec-
ondary Value 1 or Secondary Value 2 in the event of a
sensor error in the other sensor.
• PV = SV1 (OR SV2): Backup function: If sensor 1 fails,
the value of sensor 2 automatically becomes the Pri-
mary Value.
• PV = SV1 (OR SV2 if SV1>T): PV changes from SV1 to
SV2 if SV1 > value T (Parameter: Threshold value
n)
• PV =ABS(SV1-SV2) if PV> drift value: PV is the drift
value between sensor 1 and sensor 2. If PV exceeds the
configured drift value (Sensor drift alert value), a
drift alarm is output.
• PV =ABS(SV1-SV2) if PV< drift value: PV is the drift
value between sensor 1 and sensor 2. If PV under-
shoots the configured drift value (Sensor drift alert
value), a drift alarm is output.
Factory settings:
PV = SV1
Sensor Transducer 2 (Measuring mode 2):
• PV = SV2: Secondary value 2
• PV = SV2-SV1: Difference
• PV = 0.5 x (SV2+SV1): Average
• PV = 0.5 x (SV2+SV1) redundancy: Average or Sec-
ondary Value 1 or Secondary Value 2 in the event of a
sensor error in the other sensor.
• PV = SV2 (OR SV1): Backup function: If sensor 2 fails,
the value of sensor 1 automatically becomes the Pri-
mary Value.
• PV = SV2 (OR SV1 if SV2>T): PV changes from SV2 to
SV1 if SV2 > value T (Parameter: Threshold value n)
• PV =ABS(SV1-SV2) if PV> drift value: PV is the drift
value between sensor 1 and sensor 2. If PV exceeds the
configured drift value (Sensor drift alert value), a
drift alarm is output.
PV =ABS(SV1-SV2) if PV< drift value: PV is the drift value
between sensor 1 and sensor 2. If PV undershoots the
configured drift value (Sensor drift alert value), a drift
alarm is output.
Factory settings:
PV = SV1 = Sensor 2
2-wire compensa-
tion n
read/
write
Two-wire compensation for RTDs.
The following values are permitted: 0 to 30 Ohm
Factory settings:
0
Offset n read/
write
Offset for Primary Value 1
The following values are permitted:
• -10 to +10 for Celsius, Kelvin, mV and Ohm
• -18 to +18 for Fahrenheit, Rankine
Factory settings:
0.0
Setup
Menu item Parameter
"Setup" Name
Parame-
ter access
Description