PCC-IV Instruction Manual (Rev. 0.1)
Page 6-13
Section 6
– Blockware Functions
Technical Reference
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NAME: FPT/H SINGLE USE FUNCTION: N OUTPUT TYPE: A
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Input Type Description Notes
_____________________________________________________________________________________________
1 A SIGNAL INPUT
2 D HOLD SELECT INPUT (1 = HOLD) 1
3 D TRACK OVERRIDE INPUT (1 = TRACK) 1
4 D TRACK OVERRIDE INPUT (1 = TRACK) 1
Parameter Description Default Max Min Code Notes
_____________________________________________________________________________________________
1 MIN OUTPUT 0.00 199.99 -199.99 2 2
2 MAX OUTPUT 100.00 199.99 -199.99 2 2
3 %/SEC TRANSFER LIMIT
(100%=OFF) 100.00 100.00 0.10 2
Notes:
1. See Track / Hold truth table above.
2. Max Output MUST be larger than Min Output limit.
F41
[F(T)] Function of Time Generator
Function
F(T)
generates a Block Output based on a user generated output vs time profile. The parameters provide
an initial (y
0
) Block Output value (at time = 0.0 min), plus 10 additional (y, t) breakpoint pairs. Between each
breakpoint pair, the function ramps in a straight-line fashion from breakpoint to breakpoint (see the figure below).
Individual segment slopes from 600%/min to 0.01%/min can be generated.
A typical application is temperature setpoint generation for Heating or Cooling Ramp/Soak cycles.
Less than 10 Breakpoints: All ten breakpoints do not have to be used, the
F(T)
function ignores all breakpoints after
the first T
i
= 0.0 is encountered. Breakpoints 4 through 10 (inclusive) would be ignored in this example: Y0=10%;
(Y1=20%, T1=10.0); (Y2=20%, T2=20.0); (Y3=30%, T3=30.0); (Y4=0%, T4=0.0).
0
20
40
60
80
100
0
2
4
6
8
10
12
14
16
18
20
Outpu
t
(Y) Percen
t
Minutes
F(t)
T0
T1, Y1
T2, Y2
T9, Y9
