Instruction manual V 2.3
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PWM 230 - PWM 400 - PWM 400/7.5
Instruction manual
Note:
During operation it is possible to change all parameters of PWM (both those that are aligned at
communication establishment and the others) on each of the two devices. If one of the above
mentioned parameter’s value is changed on one PWM, it will change on the other PWM too.
Alignment of these values happens each time you restart a booster set or even when a general reset
happens.
Different usage strategies of interconnected electro pumps are described in sec. 5.1.2.7 “Eb: Enable
booster”. For a description of role exchange policies between devices organised in a booster set, see 5.1.3.7
“CM: Role exchange policy in booster sets”.
5.1.2.6.2 Setting address for connection to “Da Vinci” controller board
ATTENTION:
Correct operation of a multi-channel booster set is possible only if the different channels are
electrically and hydraulically identical: same electro pumps, same PWM, same manifolds,
same valves and duct geometry.
The use of “Da Vinci” controller board allows assembly of booster sets made of up to 4 PWM.
In this kind of installation it is necessary that on all PWMs that are connected to the controller board the Ad
address equals “3”.
When communication is not working (due to a wrong "Ad" value, to a wiring mistake, or to some other
cause), the PWMs will operate as two completely independent devices, but they will show the impossibility to
talk to each other and to the controller board by blinking the display while showing “Go” or “Sb”.
When PWM is operating under the controller board’s supervision, the latter reads all parameters from the
PWM and controls PWM operation. Managing of booster sets is done from the controller board and becomes
unavailable from the PWM menu.
During operation with the controller board the following features are disabled on the PWM:
-
Input 2 operation
-
SP: set-point pressure setting
-
rP: restart pressure setting
At the same time a new menu becomes available by pressing the MODE key. The new menu is called “AS”
and indicates the configuration type assigned to the PWM by the controller board.
For a detailed description of this operating mode, please see the “Da Vinci” instruction manual.
5.1.2.7
Eb: Enable booster
When two PWM units are interconnected, if operation of one PWM is not able to satisfy the user’s needs, it is
possible to activate two electro pumps at the same time.
Note: Irrespective of the value of "Ad" (primary or secondary PWM), the PWM that regulates will be called
“PWM leader” (it modulates frequency) while the PWM that works only at the highest frequency will
be called “PWM booster”.
The allowed values to enable booster operation Eb are: 1 and 2:
- Eb = 1: The leader-booster operating mode is disabled, so only one electro pump at a time will be
active.
If during operation the leader electro pump is not able to satisfy the user, the booster electro
pump will not be turned on.
-
Eb = 2: The leader-booster operating mode is enabled; so 2 electro pumps can be activated at the
same time.
If during operation the leader electro pump is not able to satisfy the user, the booster electro
pump is also turned on and works at the maximum frequency, while the leader machine