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FCP manual
Code +030220391 – rel 1.1 07/11/06 25
ERRR error reading
type and Carel supervisor address integer var. (read only) 38
Modbus address read register 138
resolution and unit of measure 1
range -255 to 255
default --
Variable used to read the value of the error (difference between the set point and the measurement of the controlled value) calculated by the control algorithm and
based on which the proportional and integral components are calculated. The error is calculated as follows:
error=set point-measurement in Reverse mode
error= measurement-set point in Direct mode
The value read is the actual value used in the algorithm, expressed in 8 bits plus sign, therefore 255 corresponds to 100% of the end scale of the controlled value.
OUTP proportional component reading
type and Carel supervisor address integer var. (read only) 39
Modbus address read register 139
resolution and unit of measure 1
range -255 to 255
default --
Variable used to read the value of the proportional component calculated by the control algorithm.
OUTP=ERRR*Kp
- where Kp is the proportional gain defined by: Kp=(OUTmax-OUTmin)/Differential.
The value read is the actual value used in the algorithm, expressed in 8 bits plus sign therefore 255 corresponds to 100% of the maximum output voltage.
OUTI
integral component reading
type and Carel supervisor address integer var. (read only) 40
Modbus address read register 140
resolution and unit of measure 1
range -255 to 255
default --
Variable used to read the value of the integral component calculated by the control algorithm.
OUTI=Ki*Integral(ERRR)=Integral(Ki*ERRR):
- where Ki is the integral gain defined by: Ki=Kp/Ti;
- where Ti is the integral time (parameter INTT)I.
The value calculated is in any case limited, as an absolute value, by the AWUP parameter.
The value read is the actual value used in the algorithm, expressed in 8 bits plus sign therefore 255 corresponds to 100% of the maximum output voltage.
OUTM minimum output reading
type and Carel supervisor address integer var. (read only) 41
Modbus address read register 141
resolution and unit of measure 1
range 0 to 255
default --
Variable used to read the value of the minimum component calculated by the control algorithm according to the minimum output value set and the outside
temperature compensation function. The value read is the actual value used in the algorithm, expressed in 8 bits plus sign therefore 255 corresponds to 100% of the
maximum output voltage.
OUTR output reading
type and Carel supervisor address integer var. (read only) 42
Modbus address read register 142
resolution and unit of measure 1
range 0 to 255
default --
Variable used to read the overall value of the output calculated by the control algorithm. During control, this value is the sum of the components OUTP, OUTI and
OUTM, limited between 0 and 255.
In the event of active alarms, Speed-up enabled or other conditions that force the output to a preset value, OUTR is not calculated as shown previously, but rather
reflects the preset value. If the Override function is enabled, OUTR maintains its normal value, even if the output is set by the OUTV parameter. The value read is the
actual value used in the algorithm, expressed in 8 bits plus sign therefore 255 corresponds to 100% of the maximum output voltage.
TFF maximum outside temperature
type and Carel supervisor address analogue var. 1
Modbus address read/write register 1
resolution and unit of measure 0.1°C
range 0.0 to 100.0
default 50.0
Parameter used to set the maximum reference temperature for the outside temperature compensation function.