ABB CL Series User Manual

Function blocks
213
1SVC 440 795 M1100
Displaying the parameter set in the PARAMETERS
menu
• + Access enabled
• – Access disabled
Coil
FT01EN to FT32EN, function block enable
Memory requirement of the FT function block
The FT function block requires 56 bytes of memory plus
4 bytes per constant on the function block input.
Function of the signal smoothing filter function block
If the function block is called for the first time, the output
value is initialised with the input value when the device is
started or after a reset. This speeds up the startup behaviour
of the function block.
The function block operates according to the following
equation:
Y(t) = [T
a
/T
g
] x [K
p
x x(t) – Y(t–1)]
Y(t) = Calculated output value for scan time t
T
a
= Scan time
T
g
= Recovery time
K
p
= Proportional gain
x(t) = Actual value with scan time t
Y(t–1) = Output value with scan time t – 1
h
The signal smoothing filter must be enabled so that it can
work. Coil FT…EN is active. If coil FT…EN is not active,
the entire function block is deactivated and reset. The
output value is set to zero.
h
The function block updates the output value every time
recovery time T
g
expires.

ABB CL Series Specifications

General

Manufacturer	ABB
Rated Control Supply Voltage (Us)	24 V DC
Mounting	DIN Rail
Category	Relays
Contact Configuration	SPDT
Coil Voltage	24 V DC
Operating Temperature	-40°C to +70°C
Electrical Life	100 Thousand Cycles
Output	Relay