CL-21 Setpoint 1
Range:
Function:
0
ProcessCtrlUnit
*
[-999999.999 -
999999.999
ProcessCtrlUnit]
Setpoint 1 is used in closed-
loop mode to enter a setpoint
reference that is used by the
frequency converter’s PID
controller. See the description
of
NOTICE
The setpoint reference
entered here is added to
any other references that
are enabled (see
parameter F-01 Frequency
Setting 1
,
parameter C-30 Frequency
Command 2
and
parameter C-34 Frequency
Command 3
).
CL-22 Setpoint 2
Range:
Function:
0
ProcessCtrlUnit
*
[-999999.999 -
999999.999
ProcessCtrlUnit]
Setpoint 2 is used in closed-
loop mode to enter a setpoint
reference for the PID
controller. See the description
of
NOTICE
The setpoint reference
entered here is added to
any other references that
are enabled (see
parameter F-01 Frequency
Setting 1
parameter C-30 Frequency
Command 2
and
parameter C-34 Frequency
Command 3
).
CL-23 Setpoint 3
Range:
Function:
0
ProcessCtrlUnit
*
[-999999.999 -
999999.999
ProcessCtrlUnit]
Setpoint 3 is used in closed-
loop mode to enter a setpoint
reference that may be used by
the frequency converter’s PID
controller. See the description
of
.
CL-23 Setpoint 3
Range:
Function:
NOTICE
The setpoint reference
entered here is added to
any other references that
are enabled (see
parameter F-01 Frequency
Setting 1
parameter C-30 Frequency
Command 2
and
parameter C-34 Frequency
Command 3
).
3.22.3 CL-3# Feedback Adv. Conversion
In air conditioning compressor applications it is often
useful to control the system based on the temperature of
the refrigerant. However, it is generally more convenient to
directly measure its pressure. This parameter group allows
the frequency converter’s PID controller to convert
refrigerant pressure measurements into temperature values.
CL-30 Refrigerant
Option:
Function:
Select the refrigerant used in the compressor
application. This parameter must be specified
correctly for the pressure to temperature
conversion to be accurate. If the refrigerant
used is not listed in options [0] through [6],
select
[7] User defined
. Then, use
parameter CL-31 User Defined Refrigerant A1
parameter CL-32 User Defined Refrigerant A2
parameter CL-33 User Defined Refrigerant A3
provide A1, A2 and A3 for the equation below:
Temperature
=
A
2
ln Pe
+ 1 −
A
1 −
A
3
[0]
*
R22
[1]
R134a
[2]
R404A
[3]
R407C
[4]
R410A
[5]
R502
[6]
R744
[7]
User
defined
CL-31 User Defined Refrigerant A1
Range:
Function:
10
*
[8 - 12] Use this parameter to enter the value of
coefficient A1 when
set to
[7] User defined
.
Parameter Description
160
03/2016 All rights reserved.
DET-620D
3
3
