Micromod MOD: 1800P - MOD 30ML Identity Module (Version 2) PID and Ramp/Soak Functions - Manual (Page 41)

Continuous Control Functions
RAMP SOAK BLOCK
3-1
3
RAMP SOAK BLOCK (RSK)
DATA BASE PARAMETERS
3.1 GENERAL
The Ramp/Soak profile block can have up to 36 ramp or soak segments. The ramp function
changes the block result (setpoint) up or down at a linear rate over the specified period of
time. The soak function maintains the block result at a fixed value for the specified period of
time. A step function has a specified time of zero. Ramp/Soak features, Figure 3-1, include:
repeating a profile, tracking function, guaranteed ramps and soaks, four segment event states
(A, B, C and D set at either TRUE or FALSE for each state), and commands of reset, stop,
run, hold and skip. Figure 3-2 shows a functional diagram of the block.
Note that the profile can also be reset, stopped, set to RUN, set to HOLD or skipped to the
next segment by writing the value 1, 2, 3, 4 or 5, respectively, to the CMD attribute. The mode
can also be set to RUN or HOLD by writing the value 0 or 1, respectively, to the MODE
attribute.
Segment 1
Start of
Profile
Process
Adjustable Hysteresis
Bandwidth
Set-Point
Optional
Repeat,
Start Next Cycle
Seg. 6 Seg. 5 Seg. 4 Seg. 3 Seg. 2
∆
Result
Adjustable Rate of Rise
(Controlled Heating)
Skip
Guaranteed Soak
with Adjustable
Soak Hysteresis
Adjustable Rate of Fall
(Controlled Cooling)
End of Profile
Segment 1
Guaranteed Ramp
with Adjustable
Ramp Hysteresis
∆
Time
Hold
Figure 3-1. Ramp/Soak Profile Characteristics