4
Figure 2.3 (b)
Figure 2.3 (a)
Target
Ramp Set-point
Balance
Soak Time
Figure 2.2 (b)
Figure 2.2 (a)
Segment
Type
Ramp
Segment
Number
2
Segment
Type
Soak
Segment
Number
3
User Manual
neuro 102 Plus
Upon keeping the UP Key pressed, the Lower Readout shows the Segment Type and Segment Number as shown in Figure
2.2 (a) & 2.2 (b).
Upon keeping the DOWN Key pressed, the Lower Readout shows the Target Set-point (if current segment is ramp) or the
Balance Time (if current segment is soak) as shown in Figure 2.3 (a) & 2.3 (b).
Note :
If Profile Cycle is in progress; the controller is always in Auto Mode. That is, Manual Mode selection is suppressed.
Table 2.1
PV above Max. Range
PV below Min. Range
Upper Readout
Error Type
Cause
Thermocouple / RTD broken
Sensor Open
Under-range
Over-range
PV Error Indications
The PV Error Type is flashed on the Upper Readout. For different Error Types and the Causes, refer Table 2.1 below.
Auxiliary Set-point Mode Indication
(Applicable if controller is supplied with Auxiliary Set-point option)
The Controller is supplied with 2 rear panel terminals for connecting remote switch (potential-free contacts) to toggle between
Main Control Set-point (SP) & Auxiliary Control Set-point.
The “Open” & “Close” switch positions activate Main Control Set-point (SP) & Auxiliary Control Set-point, respectively.
The front panel indicator ‘MODE’ glows steady with Green color if Auxiliary Control Set-point is active.
CONTROL / ALARM STATUS UNDER PV ERROR CONDITIONS
a) The tuning, if in progress, is aborted.
b) The Profile Cycle, if in progress, enters in HOLD state.
c) While in
Over-range
or
Under-range
error condition, all the control outputs are switched off. However, under
Sensor Open
error, the PID control output power is maintained at the value set for the parameter “Sensor Break Output Power” on
PAGE-12.
d) For Alarm activation, the
Under-range
condition is treated as minimum PV, whereas the
Over-range
and
Sensor Open
conditions are treated as maximum PV. Thus, Process High, positive Deviation Band and Window Band alarms activate
under
Over-range/Sensor Open
error. Similarly, Process Low, negative Deviation Band and Window Band alarms activate
during
Under-range
error.
