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FCP manual
Code +030220391 – rel 1.1 07/11/06 11
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
OFF: setting by parameters Dip1 Select device setting mode
ON: setting by trimmer
OFF: external alarm (thermal protection activated) Dip2 Select digital input function
ON: set point selection (enable double set point)
OFF: single circuit (probe B1 only) Dip3 Enable two circuits
ON: two circuits (both probes B1 and B2)
OFF: function disabled (default) Dip4 (N
OTE
1) Enable the function selected by par. DIP4 (default Cut-off)
ON: function enabled
Table 4.a
N
OTE
1: the position of dipswitch 4 has priority over the parameter that enables the associated function.
Trimmer Function Alternative function
SET Set the set point: 0 -100% If the double set point is enabled:
Set point 1 setting (Dip2 OFF)
Save set point 1 (Dip2 OFF
Æ
ON)
Set point 2 setting (Dip2 ON)
DIF Set the differential: 0 to 20%
MIN Set the minimum output. 0 to 100% If the feedforward function is enabled:
Set the feedforward gain
MAX Set the maximum output: 0 to 100%
Configuration Status of input ID1 Description
Open Alarm active ID1=External alarm (Dip2 OFF)
Closed Alarm not active
Open Set point selection 2 ID1=Double set point (Dip2
ON)
Closed Set point selection 1
Table 4.b
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 on
JB off
input for pressure/temperature probes JA, JB 0/10V input configuration (probe B1 input only)
JA off
JB on 0/10V input
Table 4.c
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 description set point setting
OFF Closed alarm not active
use the SET trimmer to set the desired value of set point 1 SET trimmer
OFF Æ ON Closed the current value of the SET trimmer is saved in non-volatile memory (parameter
“STPM”) as set point 1
ON Closed set point selection 1 parameter “STPM”
ON Open set point selection 2
Use the SET trimmer to set the desired value of set point 2
SET trimmer (set point 2)
ON Closed set point selection 1 parameter “STPM”
ON Open set point selection 2 SET trimmer (set point 2)
Table 4.d
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.