Two Circuit Function; Double Set Point Function - Carel FCP/1 User Manual

Status variables associated with the probes
par. Spv Modb
PB1R I35 135
PB2R I36 136
PB1T A11 11
PB2T A12 12
PB3T A13 13
PB1A D23 23
PB2A D24 24
PB3A D25 25
6.3

Two circuit function

If this function is enabled, control depends on:
- the higher of the values read by probes B1 and B2 if Direct mode is set;
- the lower of the values read by probes B1 and B2 if Reverse mode is set.
If disabled, control only depends on the value ready by probe B1, and the B2 probe input can remain unused without causing probe alarms.
The function is enabled by dipswitch, but probe B2 must also be enabled by parameter.
By default probes B1 and B2 are enabled by parameter, but the function is disabled by dipswitch and only probe B1 is used. Warning: if both probes B1 and B2 are
disabled, the controller forces the output either to the minimum value or to zero, according to the setting of the Cut-off function.
Dipswitch Function
Dip3 Enable two circuits
Associated parameters
par. Spv Modb
PB1E D6 6
PB2E D7 7
6.4

Double set point function

This is used to allow two different set points, and switch from one to the other based on an external control signal. The function can be enabled by dipswitch. In this
case, the digital input is used to select setpoint1 or setpoint2. If set by trimmer, the physical limitation of having just one trimmer to set the set point can be overcome
using the procedure described in the paragraph "Procedure for setting the double set point by trimmer".
Dipswitch
Dip2
Configuration
ID1=Double set point
(Dip2 ON)
Trimmer
SET
Associated parameters
par. Spv Modb
STP1 I4 104
STP2 I5 105
STPM I6 106
MOID D11 11
The value of set point1 by trimmer (par. STPM), in addition to the manual procedure, can also be set directly by parameter, as for all the other parameters.
Code +030220391 – rel 1.1 07/11/06
range def uom
0 to 100 R 1%
0 to 100 R 1%
-50.0 to +150.0 R 0.1°C
-50.0 to +150.0 R 0.1°C
-50.0 to +150.0 R 0.1°C
0/1 R 1
0/1 R 1
0/1 R 1
range def uom
0/1 1 1
0/1 1 1
Function
Select digital input function
Status of input ID1
Open
Closed
Function
Set the set point
0 -100%
range def uom
0 to 100 50 1%
0 to 100 50 1%
0 to 100 0 1%
0/1 0 1
description
probe B1 reading as a % of the range of measurement
probe B2 reading as a % of the range of measurement
probe B1 temperature reading (temp. probe only)
probe B2 temperature reading (temp. probe only)
probe B3 temperature reading
probe B1 fault alarm
probe B2 fault alarm
probe B3 fault alarm
OFF: single circuit (probe B1 only)
ON: two circuits (both probes B1 and B2)
description
Enable probe B1
Enable probe B2
OFF: external alarm (thermal protection activated)
ON: set point selection (enable double set point)
description
Set point selection 2
Set point selection 1
alternative function
If the double set point is enabled:
Set the set point 1 (Dip2 OFF)
Save set point 1 (Dip2 OFF ON)
Set the set point 2 (Dip2 ON)
description
Set point (Setpoint1)
Setpoint2
Setpoint1 memory set by trimmer
Operating logic of digital input ID1
15
0=inactive 1=active
0=inactive 1=active
0=inactive 1=active
0=disabled 1=enabled
0=disabled 1=enabled
0=normally closed 1=normally open
FCP manual
Table 6.a.f
Table 6.a.g
Table 6.a.h
Table 6.a.i
Table 6.a.l
Table 6.a.m
Table 6.a.n