Re T-two User Manual

Re S.p.A. T-two – standard model
Rev. 05/15 2/14
Detailed description of the application
The following is a functional block diagram of the T-two device application:
The T-two regulator uses an automatic tension control system for torque regulated winding/unwinding
systems fitted with load cells or dancer rolls. The torque, which is transferred to the reel via a brake
(pneumatic or electro-magnetic) or clutch, is regulated by the PID algorithm in order to maintain the
tension applied to the material (or the position of the dancer roll) constant at the setpoint. The setpoint is
set-up locally using function F.18 (if F.38 = OFF) or remotely (if F.38 = On), using a potentiometer or an
analogue signal from the PLC, for example.
When the dedicated digital input is activated, causing the regulator to switch from the STOP to the
AUTO state, the regulation begins to apply a torque value that may be either the value set-up using
function F.1 (if F.48 = OFF) or the last value that was applied in AUTO mode (if F.48 = On). If the
STOPAUTO state transition occurs after the instrument has been set to the ZERO state in order to
change the reel, the regulator will restart at the torque value set-up in F.1, irrespective of the F.48
setting; this also happens if the instrument is disconnected from its power supply.
The regulator monitors the tension (or the position of the dancer roll) continuously and if any of the
alarm limits are exceeded the corresponding digital outputs on the T-two unit are activated; this enables
external devices, such as the PLC, to detect any fault conditions.
T-two is equipped with an auxiliary analogue output that can be used to control an external display
device or, when using a dancer roll to regulate the tension, the transducer that regulates the air
pressure in the dancer roll piston; this pressure value may be set-up locally using function F.32 (if F.40
= OFF) or remotely (if F.40 = On), for example by converting the analogue signal from a potentiometer
of the PLC.
P.I.D.
SETPOINT
AUTO/STOP
TENSION / POSITION ALARM 1
TENSION / POSITION ALARM 2
ALARMS
MANAGEMENT
F.33
DANCER ROLL
AIR PRESSURE
BRAKE / CLUTCH
LOAD CELLS / DANCER ROLL
(optional)
TORQUE
ZERO
ACC
DEC
EMERGENCY
DANCER ROLL
AIR TRANSDUCER
or
REMOTE TENSION
DISPLAY
(optional)
PRESSURE
or TENSION
F.18
F.32

Re T-two Specifications

General

Brand	Re
Model	T-two
Category	Controller
Language	English