Siemens RWF40 Series - Function Ik1; Function Ik2; Function Ik3

Landis & Staefa Division CC1B7865E February 10, 2000 41/56
8. Configuration
Window function:
relay «K6» is active when the measured value lies within a window
around the setpoint (w).
Example: w = 80 °C,
AL
= 5,
HYSt
= 2
Measured value rising: relay «K6» switches on at 76 °C and off at 86 °C.
Measured value falling: relay «K6» switches on at 84 °C and off at 74 °C.
AL
HYSt
w
Measured value
7865d10e/0300
Output 4
As for lk1, but with inverted switching function.
AL
HYSt
w
Measured value
7865d09e/0300
Output 4
HYSt
= switching differential of the window edges
AL
= interval from setpoint (half the window-width)
Lower limit signaling
Function: relay inactive when measured value < (setpoint – limit value).
Example: w = 80 °C,
AL
= 10,
HYSt
= 2
Measured value rising: relay «K6» switches on at 71 °C.
Measured value falling: relay «K6» switches off at 69 °C.
AL
HYSt
w
Measured value
7865d04e/0300
Output 4
Function Ik1
Function Ik2
Function Ik3