ABB V18345

3 Operation Pos: 7.2 /==== Wechsel ein- auf zweispaltig ==== @ 0mod_1130421847171_3101.doc @ 3828 Wechsel ein-auf zweispaltig Pos: 7.3 /Überschriften/1.1/2-spaltig/Allgemeines @ 10mod_1176213970765_3101.doc @ 77124 A 3.1 General Pos: 7.4 /Technische Daten / Datenblatt/Aktorik/Stellungsregler/Allgemein/Betrieb/Allgemeines @ 10mod_1176214294328_3101.doc @ 77292 Microprocessor-based position control in the TZIDC provides for optimal results. The positioner features high-precision control functions and high operational reliability. Due to their elaborate structure and easy accessibility, the device parameters can be quickly adapted to the respective application. The total range of parameters includes: - Operating parameters - Adjustment parameters - Monitoring parameters - Diagnosis parameters - Maintenance parameters Pos: 7.5 /Überschriften/1.1.1/2-spaltig/Betriebsparameter @ 10mod_1176214001500_3101.doc @ 77145 3.1.1 Operating parameters Pos: 7.6 /Technische Daten / Datenblatt/Aktorik/Stellungsregler/TZIDC / TZIDC-200/Betrieb/Betriebsparameter @ 10mod_1176214346265_3101.doc @ 77343 The following operating parameters can be set manually if required: Signal Signal min. 4 mA, max. signal 20 mA (0 ... 100 %) freely selectable for split-range operation min. range 20 % (3.2 mA) recommended range > 50 % (8.0 mA) Action (positioning signal) Increasing: Signal 4 ... 20 mA = position 0 ... 100 % Increasing: Signal 20 ... 4 mA = position 0 ... 100 % Characteristic curve (travel = f {signal}) Linear, equal percentage 1:25 or 1:50 or 25:1 or 50:1 or freely configurable with 20 reference points. Travel limit The positioning travel, i.e. the stroke or angle of rotation, can be reduced as required within the full range of 0 ... 100 %, provided that a minimum value of 20 % is observed. Shut-off function This parameter can be set separately for each end position. When the respective configured limit value is exceeded, the shut-off function causes immediate travel of the actuator until reaching the set end position. When the shut-off value is set to “0”, the position is further controlled, even in the respective end position. Travel time prolongation This function can be used to increase the max. travel time for full travel. This time parameter can be set separately for each direction. Important This function can only be used with the pneumatics with the safety function “fail-safe”. Switching points for the position This parameter allows you to define two position limits for signaling (see option “Module for digital position feedback”). Digital output The alarms generated in the TZIDC positioner can be polled via the digital output as a collective alarm. The desired information can be selected via the operator panel or remotely via the configuration program. The output can be set to “active high” or “active low”, as required. Digital input For the digital input, one of the following safety options can be selected. You may use the operator’s panel or configuration program to select an option. - No function (default) - Move to 0 % position - Move to 100 % position - Hold previous position - disable local configuration - Disable local configuration and operation - Disable any access (no local or remote access via a PC) The selected function is activated once the 24 V DC signal is no longer applied (< 11 V DC). Pos: 7.7 /Überschriften/1.1.1/2-spaltig/Justageparameter @ 10mod_1176214036515_3101.doc @ 77166 3.1.2 Adjustment parameters Pos: 7.8 /Technische Daten / Datenblatt/Aktorik/Stellungsregler/TZIDC / TZIDC-200/Betrieb/Justageparameter @ 10mod_1176214397515_3101.doc @ 77364 The TZIDC positioner has a special function for automatic adjustment of the parameters. Additionally, the control parameters can be set automatically (in adaptive control mode) or manually to optimally adapt them to the process requirements. Tolerance band When reaching the tolerance band the position is considered as corrected. From this point on, the position is further slowly readjusted until the dead band is reached. The factory setting for this parameter is 0.3 %. Dead band (sensitivity) When reaching the dead band, the position is held. The factory setting for this parameter is 0,1 %. Actuator spring action Selection of the sensor shaft rotating sense (looking into the open case), if the valve is moved to the safe position by the actuator spring (actuator is depressurized via Y1/OUT1). For double-acting actuators the actuator spring action corresponds to pressurizing the pneumatic output (OUT2). Display 0 ... 100 % Adjusting the display (0 ... 100 %) according to the direction of action for opening or closing the valve. Pos: 7.9 /Überschriften/1.1.1/2-spaltig/Betriebsüberwachungsparameter @ 10mod_1176214071453_3101.doc @ 77187 3.1.3 Monitoring parameters Pos: 7.10 /Technische Daten / Datenblatt/Aktorik/Stellungsregler/TZIDC / TZIDC-200/Betrieb/Betriebsüberwachungsparameter @ 10mod_1176214447375_3101.doc @ 77385 B Various functions for permanent operational monitoring are implemented in the TZIDC operating program. The following states will be detected and indicated, e.g.: - 4 ... 20 mA signal out of range - position out of the adjusted range - positioning time-out (adjustable time parameter) - position controller inactive - counter limits (settable in the diagnosis phase) exceeded While automatic commissioning is in progress, the current state is continuously indicated on the integrated LCD. During operation, the LCD shows the most important process variables: - current position (in %), - malfunctions, alarms, messages (as code) Access to extended monitoring parameters is possible via HART communication and the DTM.