Instruction manual V 2.3
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PWM 230 - PWM 400 - PWM 400/7.5
Instruction manual
5.1.3.9
Setup of the IN1, IN2 and IN3 auxiliary digital inputs with the i1, i2 and i3 parameters.
The function assigned to each of the digital inputs IN1; IN2; IN3 may be activated or modified by means of
the i1; i2; i3 parameters.
The allowed values of i1, i2 and i3 are:
0
→
function disabled
1
→
function active when input is high2
→
function active when input is low
The only exception is i3, whose allowed values also include 3, 4 and 5(for details see sec. 5.1.3.9.3)
Connection is described in sec. 2.4.
5.1.3.9.1 I1: Setting function of input 1 (external float)
i1 = 00: Input disabled.
Status of input 1 is ignored, so an external float will never cause an error for lack of water.
Consequently, “F1” will never appear on the display.
i1 = 01: Lack of water from external float (NO)
IN1: 0 (not energized input)
Normal operation
IN1: 1 (energized input)
“F1” alarm on display and system lock (lack of water
from external float)
Note
In order that the system locks and displays the “F1” error, the input must be at 1 (energized) for at
least 1 sec.
When an “F1” error condition occurs, the input must be at 0 (not energized) for at least 30 sec.
before the system unlocks.
i1 = 02: Lack of water from external float (NC)
IN1: 00 (not energized input)
Alarm F1 on display and system lock (lack of water from
external float)
IN1: 01 (energized input)
Normal operation
Note: In order that the system locks and displays the “F1” error, the input must be at 0 (not energized) for
at least 1 sec.
When the “F1” error condition is set, the input must be at 1 (energized) for at least 30 sec. before the
system unlocks.
5.1.3.9.2 I2: Setting function of inlet 2 (active set-point selection: “SP” or “P1”)
i2 = 00: Input disabled.
Irrespective of the input status, SP is always used as a pressure set point.
i2 = 01: 2 set point system (NO)
IN2: 00 (not energized input)
active set point is SP. In normal display mode “Go” or
“Sb” is displayed; the read-only GS parameter value is
“SP” (provided that no anti-freeze/anti-block procedure is
being performed)
IN2: 01 (energized input)
active set point is P1. In normal display mode ”Go” or
“Sb” is displayed; the read-only GS parameter value is
“P1” (provided that no anti-freeze/anti-block procedure is
being performed)
Note: In order that the system uses P1 as its set point, the input must be at 1 (energized) for at
least 1 sec. When P1 is the active set point, the input must be at 0 (not energized) for at least 1 sec,
before SP returns to be the active set point.
