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There are two possibilities:
A Start-up Setpoint #sp.sU
lower than the local Setpoint.
The “Hold” phase starts when
the process variable PV
achieves the
#sp.sU (with a
tolerance of 1 digit).
B Start-up Setpoint #sp.sU
greater than or equal to the
local Setpoint.
When the process variable PV
achieves the local Setpoint (with a tol-
erance of 1 digit), the Start-up function
passes directly to the “Off” phase.
If, at the controller power-on, the
process variable PV is greater than
the lowest between the
#sp.sU and
the working Setpoint , the next phase
(“Hold” or “Off”) will executed instead
of the “Limy” phase.
During the
“Limy” and
“Hold” phas-
es the
Ö led
is on.
420
1285
RUN
Start-up
Setpoint
41
6 - Special functions
A #s.p.sU < local Setpoint SP
B #s.p.sU < local Setpoint SP
noise
Setpoint SP
PV
40 digit
1 digit
#t.h.s.U #t.h.s.U
#sp.s.U
power-on
OP=Op.H5
with TC = 25%
1sec min.
1
st
“Limy” 2
nd
“Hold” 3
rd
“Off” 1
st
“Limy” 2
nd
“Hold” 3
rd
“Off”
noise
Setpoint SP
PV
40 digit
1 digit
#sp.s.U
power-on
OP=Op.H5
con TC = 25%
1sec min.
1
st
“Limy” 3
rd
“Off” 1
st
“Limy” 3
rd
“Off”