gefran GFX4 Configuration And Programming Manual page 44

Heat/cool control with separate or superimposed band
Output with separate band
Control output with only proportional action in case of proportional
heating band separate from cooling band.
c_Pb
SP+cSP
SP
h_Pb
+100%
Control output
0%
-100%
PV = process variable
SP + cSP = cooling setpoint
c_Pb = cooling proportional band
Heat/cool control with relative gain
This control mode (enabled with parameter Ctr = 14) asks you to specify cooling type. The PID cooling parameters are then cal-
culated based on heating parameters in the ratio specified (ex: C.ME = 1 (oil), H_Pb = 10, H_dt =1, H_It = 4 implies: C_Pb = 12.5, C_dt = 1
, C_It = 4)
Apply the following values when setting cycle times:
Air T Cool cycle = 10 sec.
Oil T Cool cycle = 4 sec.
Water T Cool cycle = 2 sec.
NB.: Cool parameters cannot be changed in this mode.
PID Parameters
617
spu
(*):
- The reference power of a slave zone in automatic mode is the power of a master
zone in automatic or manual mode.
- The reference power of a slave zone in manual mode is the zone manual power.
- Software shutdown remains independent for each zone.
180
(tr
WARNING: the Control ( "Ctr") default parameter changed
from "6" to "134" starting from products with serial
number "SN 1013A1965" ( March 2010).
The option "+128", used to disable the "Integral power reset" has
been introduced as an improvement, starting from the Software
version "1.43".
We strongly suggest to verify the eventual recipes created with
Software versions before the 1.43, because, if the parameter
"Ctr" is included in the recipe, it could be configured in an unde-
sirable way.
44
PV
Time
Selection of process variable of zone /
R/W
Zone reference power
R/W Control type
Output with superimposed band
Control output with only proportional action in case of proportional
heating band superimposed on cooling band.
SP
c_Pb
SP+cSP
h_Pb
+100%
Control output
0%
-100%
PV = process variable
SP = heating setpoint
h_Pb = heating proportional band
Table of selections
1 PV zone 1
2 PV zone 2
3 PV zone 3
4 PV zone 4
9 POWER zone 1 (*)
10 POWER zone 2 (*)
11 POWER zone 3 (*)
12 POWER zone 4 (*)
Table of heat/cool controls
Val Control type
0 P heat
1 P cool
2 P heat / cool
3 PI heat
4 PI cool
5 PI heat / cool
6 PID heat
7 PID cool
8 PID heat / cool
9 ON-OFF heat
10 ON-OFF cool
11 ON-OFF heat / cool
12 PID heat + ON-OFF cool
13 ON-OFF heat + PID cool
14 PID heat + cool with relative gain (see parameter C.ME)
Select sample time for derivative action.
+0 sample 1 sec.
+16 sample 4 sec.
+32 sample 8 sec.
+64 sample 240 msec.
+128 No Reset of integral component at setpoint change
Note: the LBA alarm is not enabled in the ON/OFF control.
880397M_MSW_GFX4-GFXTERMO4_08-2018_ENG
PV
Time
1 2 3
zone 4
zone 1 zone 2 zone 3
134
4