Carbolite nanodac - Manual (Page 36)

nanodac™
MC27 –EN– 1.04
34
Programmer Display Mode (cont.)
SEGMENT CONFIGURATION (Cont.)
Type Select a segment type. Default is ‘End’.
Ramp. For any program, Ramp segments can be either ‘Ramp Rate’ segments or
‘Ramp Time’ segments according to the ‘Ramp Style’ setting described above. See
also ‘Ch1(2) Time’ or ‘Ch1(2) Rate’, below.
Dwell. The setpoint is maintained at its current value for the period defined in
‘Duration’ (see below).
Step. A step segment allows a step change to be entered for the target set-points
Ch1 TSP and Ch2 TSP.
Wait. A wait segment causes the program to wait for a certain event to occur
before continuing. See ‘Wait For’, below.
Go Back. A Go Back segment allows a specifiable number of iterations to be
performed of a group of segments. This could be used, for example, to cycle an
entire program by having a Go Back segment immediately before the end segment
and specifying segment 1 as the ‘Go Back To’ point. Setting ’Cycles’ to
‘Continuous’ causes the program to loop indefinitely, until interrupted by the user.
‘Nested’ loops are not permitted i.e. ‘Go Back’ is not available as a segment type
for segments inside an existing GoBack loop.
End. The final segment of a program allows the user to select ‘Dwell’ or ‘Reset’ as
the action to be taken at the end of the program (see ‘End Type’, below)
Ch1(2) TSP Target setpoint. The value that Ramp or Step segments seek to attain, for channel
1(2).
Ch1(2) Rate For Ramp Rate segments, this specifies the speed at which the process value
ramps towards the target, for Channel 1(2). The ramp units (per second, per
minute, per hour) are set in Ch1(2) ramp units described above.
Ch1(2) Time For Ramp Time segments, this allows the user to specify the time to be taken by
the segment for the process value to reach the target.
Duration For Dwell segments, this allows the entry of the time for which the segment
dwells.
Go Back To For ‘Go Back’ segments, this defines the number of the segment to which the
program is to return.
Cycles The number of times the ‘Go Back’ instruction is to be carried out. If set to
‘Continuous’, the program continues until the user intervenes to stop it.
End Type Allows the user to select the action to be taken at the end of the program:
Dwell: the set-point is maintained indefinitely and event outputs remain at their
configured state.
Reset: the set-point reverts to the value used by the control loop before the
program was started and the event outputs return to their default states.
Wait For Digital High: Wait segments can be configured to wait for ‘Wait Digital’ to go ‘high’
before allowing the program to continue.
Analog 1(2): The segment waits for ‘Wait Analog1(2) to meet an Absolute High or
Low, or Deviation High or Low condition before allowing the program to continue.
Analog Both: As Analog 1(2) above, but waits for both Channels’ conditions to be
true before continuing.
Note: ‘Wait Digital’, Wait Analog 1’ and ‘Wait Analog 2’ parameters are configured in the
Programmer.Set Up menu.
Ch1 Wait Select ‘Abs High’, ‘Abs Low’, ‘Dev High’ or ‘Dev Low’ as the wait criterion for
channel 1. Appears only if ‘Wait For’ (above) is set to ‘Analog 1’ or ‘Analog Both’.
Ch2 Wait Select ‘Abs High’, ‘Abs Low’, ‘Dev High’ or ‘Dev Low’ as the wait criterion for
channel 2. Appears only if ‘Wait For’ (above) is set to ‘Analog 2’ or ‘Analog Both’.
Ch1(2) Wait Val Enter the trigger value for ‘Ch1(2) Wait’