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DIGITAL INDUSTRIAL CONTROLLER
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9.3 Abbreviations
Cch High manipulated variable limit for "Cooling" (position controll)
Ccl Low manipulated variable limit for "Cooling" (position controll)
Chh High manipulated variable limit for "Heating" (position controll)
Chl Low manipulated variable limit for "Heating" (position controll)
CO0 Operating point of controller 1 or 2
COh High manipulated variable limit
COl Low manipulated variable limit
COs Safety value for the manipulated variable
D Setpoint ramp pitch
Fg1 Cut-off frequency (-3 dB) of input filter 1
Fg2 Cut-off frequency (-3 dB) of input filter 2
Gt Backlash for direction reversal
Hy Alarm hysterises
Kp1 Proportional action coefficient (gain) of PID controller 1 or 2
Kp2 Proportional action coefficient (only for 3-point PMW signal, "Cooling")
Kps Proportional action coefficient for "Heating" and "Cooling"
Olp Overlap zone of the signals for "Heating" and "Cooling"
P2h High scaling value for input 2
P2l Low scaling value for input 2
Pdb Dead zone around the setpoint
Pr+ High alarm limit, which refers to the ratio
Pr- low alarm limit, which refers to the ratio
Prh High scaling value for the ratio
Prl Low scaling value for the ratio
Psd Insensitivity zone between the two switching functions
Psh Swichting hysteresis of the relays
PV+ High alarm limit for input 1
PV- High alarm limit for input 2
PVd System diviation
PVh High scaling value for input 1
PVl Low scaling value for input 1
SP1 Setpoint of controller 1
SP2 Setpoint of controller 2
SPh High setpoint limit
SPl Low setpoint limit
Srh High setpoint limit in ratio control
Srl Low setpoint limit in ratio control
T+ Period of the PWM signal for "Heating"
T- Period of the PWM signal for "Cooling"
TCO Run time from one end position to the other
Td Derivative action time of PID controller 1 or 2
Tds Derivative action time of the PDT1 element
Tr Reset time of PID controller 1 or 2
Ts Time constant of the PDT1 element
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