Programming The Instruments; Procedure For Setting The Double Set Point By Trimmer - Carel FCP/1 User Manual

4. Programming the instruments

The instruments are programmed by dipswitches, trimmers and jumpers, and by setting the internal parameters accessible via programming key or via serial line. The
functions that can be set manually are shown in the tables below:
Dipswitch Function
Dip1 Select device setting mode
Dip2 Select digital input function
Dip3 Enable two circuits
Dip4 (N 1) Enable the function selected by par. DIP4 (default Cut-off)
OTE
N 1: the position of dipswitch 4 has priority over the parameter that enables the associated function.
OTE
Trimmer Function
SET Set the set point: 0 -100%
DIF Set the differential: 0 to 20%
MIN Set the minimum output. 0 to 100%
MAX Set the maximum output: 0 to 100%
Configuration Status of input ID1
ID1=External alarm (Dip2 OFF) Open
Closed
ID1=Double set point (Dip2 Open
ON)
Closed
Digital input ID1 is normally closed by default. A parameter can be set to change the operating logic and manage it as a normally open contact, in which case the
meaning of "Open" and "Closed" must be reversed.
If slave mode is enabled, the external control signal is 0/10V. In this case, the controller electrical circuits need to be modified using jumper JA and JB, as shown in
the table below:
Jumper
JA, JB 0/10V input configuration (probe B1 input only)
If the double set point function is used with setting by trimmer, the fact that only one trimmer is available for setting the set point is a clear limitation, which can however
be overcome by following the procedure described below.
4.1

Procedure for setting the double set point by trimmer

The value to be used as setpoint1 is initially saved by adjusting the SET trimmer, and then subsequently selected by digital input, after which the SET trimmer is used
to establish set point 2. Dip1 is ON (setting by trimmer) and digital input ID1 is assumed as normally closed.
Dip2 Input ID1
OFF Closed
OFF ON Closed
ON Closed
ON Open
ON Closed
ON Open
To modify the value of setpoint1, repeat the sequence from the start.
Warning: when Dip2 is OFF, the digital input must be closed, otherwise the alarm condition and corresponding output voltage setting have priority over the set point
and consequently the fan speed will not reflect the value set by the trimmer.
Code +030220391 – rel 1.1 07/11/06
description
alarm not active
use the SET trimmer to set the desired value of set point 1
the current value of the SET trimmer is saved in non-volatile memory (parameter
"STPM") as set point 1
set point selection 1
set point selection 2
Use the SET trimmer to set the desired value of set point 2
set point selection 1
set point selection 2
OFF: setting by parameters
ON: setting by trimmer
OFF: external alarm (thermal protection activated)
ON: set point selection (enable double set point)
OFF: single circuit (probe B1 only)
ON: two circuits (both probes B1 and B2)
OFF: function disabled (default)
ON: function enabled
Alternative function
If the double set point is enabled:
Set point 1 setting (Dip2 OFF)
Save set point 1 (Dip2 OFF ON)
Set point 2 setting (Dip2 ON)
If the feedforward function is enabled:
Set the feedforward gain
Description
Alarm active
Alarm not active
Set point selection 2
Set point selection 1
JA on input for pressure/temperature probes
JB off
JA off 0/10V input
JB on
11
FCP manual
Table 4.a
Table 4.b
Table 4.c
set point setting
SET trimmer
parameter "STPM"
SET trimmer (set point 2)
parameter "STPM"
SET trimmer (set point 2)
Table 4.d