Siemens RWF40 Series Operation & User’s Manual

Landis & Staefa Division 11. Technical data Resolution: > 15 bit Measured value accuracy Ambient temperature error Resistance thermometer: ≤ 0.05 % ≤ 50 ppm / K Thermocouples: ≤ 0.25 % ≤ 100 ppm / K Standard signals: ≤ 0.1 % ≤ 100 ppm / K The values include the linearization tolerances. Transducer Probe break Short-circuit Resistance thermometer X X Thermocouples X - DC 0…10 V - - DC 0…20 mA - - DC 4…20 mA X X - = is not detected X = is detected, and «–1999» appears on the display � Chapter 10 «What to do if...» Permissible ambient ...

CC1B7865E February 10, 2000 49/56 9. Self-setting function The optimum adjustment of the controller to the controlled system can be checked by recording a startup sequence with the control loop closed. The following diagrams indicate possible incorrect adjustments, and their correction. The response to a setpoint change is shown here for a 3rd order controlled system for a PID controller. The method used for adjusting the controller parameters can, however, also be applied to other controlled systems. A favourable value for «dt» is «rt» / 4. «PB too small» «PB t ...

Landis & Staefa Division 10. What to do, if ... This is an indication that a measured value is not being acquired correctly. � The detection of measured value range crossings depends on the type of sensor used. � Section 11.3.2 «Measured value circuit monitoring» Display Description Cause / controller behavior / remedy 1999 60.0 7865p08/0200 Actual value display (red) shows «1999» flashing. Setpoint display shows the setpoint. � Overrange or underrange on analog input 1. The actual value is not being measured. Controller initiates lockout. � Sec ...

CC1B7865E February 10, 2000 35/56 6. Operation The parameters involved in the adaptation of the controller to the controlled system are set here after the system has been started up. Within the level, you can proceed to the next parameter by pressing PGM . � The display of the individual parameters depends on the type of controller. The entry and alteration of parameters is made through a continuous alteration of the value. The longer you keep the button pressed, the faster the rate of change becomes. ✱✱✱✱ Increase value by pressing ▲ ✱✱✱✱ Reduce v ...

CC1B7865E February 10, 2000 11/56 3. Installation The front panel can be cleaned with normal washing and rinsing agents or detergents. � It is not resistant to corrosive acids, caustic solutions and abrasive cleaners, or cleaning with high-pressure cleaners! The controller module can be removed from the housing for servicing. The rules of DIN EN 100 015 «Protection of electrostatically sensitive devices » must be adhered to for internal work on the controller! No liability will be accepted for damage caused by electrostatic discharge. 7865z09/0200 ✱✱✱✱ Pres ...