Celduc Temperature controller ECOM - Manuel (Page 47)

48 ECOM0010 - User manual
6.2 Manual tuning
Set 2 in parameter 5 (
7XQH
word 2005).
The manual procedure allows the user a greater flexibility on
deciding when to update PID algorithm parameters.
This procedure is activated writing 1 in the word modbus
1004.
The reference threshold to calculate the new PID parameters
is given by the result of the following operation:
Tuning threshold = Setpoint (word 1001) – Par.6
VGWX
(word 2006)
Ex.: if setpoint is 100.0°C and Par.6
VGWX
is 20.0°C, the
threshold to calculate PID parameters is (100.0–20.0) = 80.0°C.
N.B.: for greater accuracy in the calculation of PID parameters
it is recommended to launch the manual tuning when the
process is far from setpoint.
6.3 Synchronised tuning
4FU

JO
QBSBNFUFS


7XQH
word 2005).
This procedure has been designed to calculate correct PID
values on multi-zone systems, where each temperature
is influenced by the next zones. Writing in word 1004, the
device works as follows:
Word 1004 value Action
0 Tune off.
1 Control output OFF
2 Control output ON
3 Tuning active
4 Tuning completed: control output OFF
The operation of this Tuning mode is the following: the
master switches off or turns on all controllers (value 1 or 2 on
word 1004) for a time which is long enough to create inertia