EVCO S.p.A. EVDRIVE03 | User manual ver. 3.7 | Code 144EPDE374
Page 22 of 76
The operation mode is set using Main control type (Pcty), and when the valve is enabled:
if Pcty = 0 the system remains held in the Stand-by on (11)
if Pcty = 1... 5 the analog positioner (30) operation mode begins
if Pcty ≥ 6 start SH-algorithm or manual mode.
Please note regardless of the state of the enabled valve, disabling it will cause a positioning procedure using the value
specified in stand-by position (parameter Pr20), after which the state is changed to Stand-by off (10).
6.4 Enabling EVDRIVE03
Excluding the automatic movements, it is necessary to enable the valve module EVDRIVE03 before moving it.
Enabling mode (parameter Pr06) configures the enabled features to be accepted.
When the valve module is to be used in standalone mode, an enable from digital input mode must be chosen
(parameter Pr06 = 0 or Pr06 =1).
The selection must be made based on the type of input to be used.
A typical application of the DIHV (parameter Pr06 = 1) mode is to connect it in parallel to the compressor, such that
the valve is enabled along with it.
To enable the valve using digital inputs, it is necessary for these to be configured correctly, otherwise a configuration
alarm will be generated.
In particular:
If Pr06 = 0: the DI1 or D12 input must be configured as enable > Ph11 = 1 or Ph21 = 1
If Pr06 = 1: the DIHV input must be configured as enable > Ph31 = 1
Selecting the values from 2 to 9 the valve can be enabled via serial port using MODBUS or CAN communication
protocols: this selection must be made if a controller manages the EVDRIVE03.
Selecting values from 6 to 9, it is possible to operate the EVDRIVE03 in standalone mode if a communications fault
occurs, in this case the DI1 or DI2 inputs must be configured as enable (parameter Ph11 = 1 or Ph21 = 1).
The enabling of the valve using a communication network requires system which ensures the EVDRIVE03 can
determine whether the controller is still online: specifically, the module expects the controller updates the variable
Enable valve command (parameter EnaV) periodically.
The Enable valve command (parameter EnaV) has different addresses according to the communication system chosen:
- CAN (Pr06 = 2 or Pr06 = 6)
- MODBUS RS-485 (Pr06 = 4 or Pr06 = 8): EnaV address = 1281
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.
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