User`s manual

2-14
<Toc> <2. Initial Settings>
IM 05D01D12-41E 6th Edition: Mar. 25, 2005-00
2.7 Setting the High Limit and Low limit for PV Color
Change
The following operating procedure describes an example of changing the PV display color
by PV limit(s). Set the High limit and / or Low limit for PV color change.
Press the key several times to display the
parameter “PCCH.”
Bring the operating display into view (appears at
power-on).
Press the key once to register the
setpoint.
Also set the PCCL (Low limit for PV color change
parameter) that follows this step.
(1)
(3)
Press the key or key to display the
required setpoint.
(4)
(5)
(6)
Press the key for more than 3 seconds.
This returns you to the display shown at power-
on (figure below).
Press the key for more than 3 seconds to
call up the menu “OP.PA.”
(2)
SET/ENT
SET/ENT
SET/ENT
SET/ENT
PV
MAN
A/M
SP
AL123
SP
234
SET/ENT
PV
MAN
A/M
SP
AL123
SP
234
SET/ENT
PV
MAN
A/M
SP
AL123
SP
234
SET/ENT
PV
MAN
A/M
SP
AL123
SP
234
SET/ENT
PV
MAN
A/M
SP
AL123
SP
234
SET/ENT
PV
MAN
A/M
SP
AL123
SP
234
SET/ENT
Displays PV.
Displays
target setpoint.
Displays
menu “OP.PA”
Displays parameter
“PCCH.”
Blinks during
change.
Displays PV.
Displays
target setpoint.
2.8 Description of Multiple Setpoints and PID
The UT351/UT321 controllers have a maximum of four target setpoint (SP) parameters
and has PID for each of these setpoints. The following shows the correspondence between
the target setpoint numbers (SP.NO), target setpoints (SP), and PID parameters.
For example, if you have set “2” to the target setpoint number (SP.NO), the control param-
eters available are target setpoint (2.SP), proportional band (heating-side proportional
band) (2.P), integral time (heating-side integral time) (2.I), derivative time (heating-side
derivative time) (2.D), cooling-side proportional band (2.Pc), cooling-side integral time
(2.Ic), and cooling-side derivative time (2.Dc).
To use multiple target setpoints, see the table below to check the corresponding param-
eters.
PID parameter
Target setpoint
number
(SP.NO)
Target
setpoint
(SP)
Proportional
band
(heating-side
proportional band)
Integral time
(heating-side
integral time)
Derivative time
(heating-side
derivative time)
Cooling-side
proportional
band
Cooling-side
integral time
Cooling-side
derivative time
SP.NO=2 2.SP 2.P 2.I 2.D 2.Pc 2.Ic 2.Dc
SP.NO=3 3.SP 3.P 3.I 3.D 3.Pc 3.Ic 3.Dc
SP.NO=4 4.SP 4.P 4.I 4.D 4.Pc 4.Ic 4.Dc
SP.NO=1 1.SP 1.P 1.I 1.D 1.Pc 1.Ic 1.Dc