EVCO EPD4DF3 Installer manual - Manual (Page 22)

EVCO S.p.A. EVDRIVE03 | User manual ver. 3.4 | Code 144EPDE344
page 22 of 70
6.5 Analog positioner control
The analog positioner mode permit to move the valve position linearly respect to the value applied to the active analog
input.
Pcty =
01 > analog positioner on AI1 (0÷20mA)
Pcty = 02 > analog positioner on AI2 (4÷20mA)
Pcty = 03 > analog positioner on AI3 (0÷5V)
Pcty = 04 > analog positioner on AI4 (0÷10V)
Pcty = 05 > analog positioner on AI4 (Pia4).
To enter analog positioner mode, from the Stand-by, set the Main control type (parameter Pcty) with a value between
1 and 5, and enable the valve; if all the configuration is correct enter in Stand-by on (11), and then in the Analog
positioner (30).
To exit the analog positioner mode, it is necessary to disable the valve, which will cause a positioning movement to
the value specified in Stand-by position (parameter Pr20), before entering the Stand-by off (10).
The setting of Main control type (parameter Pcty) with a value between 1 and 4 impose to connect the indicated AI
with the indicated probe, if the parameter Pcty = 5 impose to connect the probe with the AI4 and Ai4 probe usage
(parameter Pia4) permit to choose the probe type.
The other three analog input are configured according to their respective Ai probe usage (parameter Pia).
6.6 Algorithm start-up
To enter algorithm mode, from the Stand-by off (10), set the Main control type (parameter Pcty) with a value greater
or equal to 6, and enable the valve. If all the configuration is correct enter in Stand-by on (11) and then in the
Stabilization (40), in which is performed a positioning to Stabilization position (parameter Pr09) and await expiration
of Stabilization delay (parameter Pr08).
Then enter in Start-up (41), in which is performed a positioning to Start-up position (parameter Pc21 or Pp21), await
Start-up delay (parameter Pc20 or Pp20) and finally enter in the Algorithm selection (42) in which evaluates Main
control type (parameter Pcty) and Functioning mode (parameter Pr02).
This state also enables manual mode, debugger mode, or one of the available SH-algorithm.
The Functioning mode (parameter Pr02) defines the algorithm's operation mode, while Main control type (parameter
Pcty) defines which algorithm can be used.
Specifically:
Pr02 = 0: enables control SH-algorithm defined by Main control type (parameter Pcty)
Pr02 = 1: enables manual algorithm, which permits movement of the valve to the position specified by Manual
set-point position (parameter Pr03)
Pr02 = 2: actives a specific algorithm that moves the valve linearly up and down, at the desired step rate,
between two specified positions.
Loading of Functioning mode (parameter Pr02) occurs every main cycle, and thus switching between the three
algorithm operation modes occurs without forced intermediate positioning moves.
Note that Functioning mode (parameter Pr02) and Manual set-point position (parameter Pr03) are not
saved into Eeprom, this means that from reset the valve starts always in automatic mode with Functioning
mode Pr02 = 0 and Manual set-point position Pr03 = 0.
When enabled, the SH-algorithm automatically recalculates the optimal value of the Start-up position (parameter Pc21
or Pp21).