nVent RAYCHEM 1244-0006829, Operating And Installation Manual

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ConF
->
rAFC
->
Parameters
Value /
Selection Description
Function
FnCt
0
1
2
3
deactivated
Ramp Kelvin/Minute
Ramp Kelvin/Hour
Ramp Kelvin/Day
The ramp limit value can be changed using
the or keys.
t1
(1)
(2)
w1
w2
t2 t3 t4 t5 t6 t
(1) = Set point value (2) = Process value
t1: Power ON/Ramp start (w1 active)
t2-t3: Mains failure/Manual mode/Probe
break t4-t5: Ramp stop
t6: Set point value changeover to w2
The ramp function can be stopped, cancelled
and restarted using binary functions.
Chapter 7.7 “Binary functions”
Ramp rate
rASL
0.0…
999.9
Value of ramp rate
(for functions 1 to 3 only)
Tolerance
band
toLP
0…9999 Range of the tolerance band (in Kelvin)
around the set point value
0 = Tolerance band inactive
(for functions 1 to 3 only)
For the ramp function, it is possible to
enter a tolerance band around the set point
value curve to monitor the process value.
A tolerance band signal to be used internally
or transmitted via an output is triggered when
the upper or lower limit is exceeded. In the
following example, the tolerance band (toLP) is
40 K. Thus a tolerance band signal is triggered
when the process value exceeds the upper or
lower set point value by 20 K.
w
t
40.00
Further information about the use of the
tolerance band signal:
Chapter 7.6 “Outputs”
Chapter 7.7 “Binary functions”