49
promesstec GmbH
I Niedersachsenstraße 4 I D- 48465 Schüttorf I Tel.:+49 (0)5923/ 90 229 0 I Fax:+49 (0)5923/ 90 229 29
E-Mail: [email protected] I Internet: www.promesstec.com
Example:
Heating PID & Cooling ON-OFF: OUT1 = REVR, A1FN or A2FN = PV1.H, A1MD
or
A2MD = NORM, A1HY or A2HY = 0,1,
PB1 ≠ 0,
TI1 ≠ 0, TD1 ≠ 0, and suitable values for O1TY and CYC1
Heating PID & Cooling PID: OUT1 = REVR, OUT2 = COOL, CBP = 100, DB = -4,0,
PB1 ≠ 0, TI1 ≠ 0, TD1 ≠ 0, and suitable values for O1TY, CYC1,
O2TY, CYC2
CPB setting:
The cooling proportional band measures % of PB (proportional band)
with a range of 1 - 255 %, CBP factory setting = 100%. CBP monitors the cooling
process. If the cooling is to be increased, lower CBP, if the cooling is too strong, in-
crease CBP. CBP is linked to PB and remains unaffected by self-tuning and auto-set-
ting.
The CPB setting depends on the coolant used.
Recommendation:
Coolant
CBP-value
Air
100%
Oil
125%
Water
250%
DB setting:
The heating-cooling dead band depends on the process requirements,
setting range from -36% to +36%. In the positive value range, unintentional cooling is
prevented, but strong exceeding of the setpoint can occur. In the negative value
range (overlapping), strong exceeding of the setpoint is minimised, but unintentional
cooling can occur.
DB is in the range of -36% to 36% adjustable and refers to PB1 (resp. PB2, if PB2 is
activated). A negative DB value creates an overlap, both outputs are active. A posi-
tive DB value creates a dead zone, no output is activated.
