Twido Programmable controller

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Functions Twido programmable controller 0 Extreme base PWM function: Pulse Width Modulation PWM inputs The Twido Extreme controller has two PWM inputs for receiving data from the sensors delivering proportional signals. This type of signal transmits data reliably in severe environments (because of its excellent immunity to interference). These inputs can be used to connect the control lever to one or two electronic shafts. PWM/PLS outputs The Twido Extreme controller PWM/PLS outputs are used to connect devices in extremely tough environments which demand proportional data. This involves a special function that can be assigned to the 3 controller outputs (Q0.0, Q0.1 or Q0.2). Example of control lever with 1 or 2 electronic shafts Outputs Frequency range Cyclic ratio Q0.0 and Q0.1 10 Hz…1 kHz 5…95% Q0.2 10 Hz…5 kHz 20…80% The Twido Extreme controller PWM outputs can be used in hydraulic mode to control proportional valves. Constant ON to OFF ratio Variable period T PLS function PLS function blocks generate pulses of fi xed ratio. In some cases, the frequency can be fi xed and in others it is variable (as in control of slopes when driving a stepper motor). The %PLS function block can be programmed to generate a specific number of pulses. %PLS function blocks are assigned to the 3 outputs Q0.0, Q0.1 and Q0.2 on the Twido Extreme controller. The pulse generator signal has a variable period, but with a constant duty cycle which establishes an ON to OFF ratio of 50% of the period (see illustration opposite). Constant period T Variable ON to OFF ratio PWM function PWM function blocks generate pulses of fi xed frequency, with a variable ON to OFF ratio for the output signal. The cyclic ratio (ON to OFF duration) is a dynamic variable called %PWM.R. The user-defi ned %PWM function blocks generate signals for the 3 outputs Q0.0, Q0.1 and Q0.2 of the Twido Extreme controller (see illustration opposite). Description: page 24 Characteristics: pages 25 to 27 Dimensions: page 30 Connections: page 31 References: pages 32 and 33 28
Functions (continued) Twido programmable controller 0 Extreme base Communication The Twido Extreme controller has three communication ports, including the CAN J1939 port described below: Sensors Control levers Power relays Modbus Twido Extreme CAN J1939 CANopen Advantys IP 67 distributed I/O Diesel engine CAN J1939 communication protocol The Twido Extreme controller has been designed to enable direct communication with external devices, such as diesel engines. CAN J1939 is a recognized protocol in automotive applications. TwidoSuite software takes account of the CAN J1939 bus configuration in a simple way. Communication between the controller and the external device (the diesel engine in the example above), takes place via exchange of implicit data (such as engine speed, engine temperature, fuel level, etc.) in the form: IWCx, y, z, QWCx, y, z, where: b x represents the cable number v = 1 for the CANopen bus v = 0 for the CAN J1939 bus b y represents the object number in the object list b z represents the sub-object number The CAN J1939 architecture of a Twido Extreme system consists of: b 32 CAN J1939 objects, maximum addresses: 0 to 255. I0.0 Battery 36 Run/Stop 37 70 Key switch - Key switch function The Key switch is used to set the Twido Extreme controller to standby or to exit standby mode, in order to minimize battery consumption during lengthy periods when the application is stopped. In standby mode, if the battery power supply is not interrupted, this special input can be used to save the controller data context. When exiting standby mode and starting the application (RUN), the application will resume its cycle at the state it was in at the time of stopping (before setting to standby). In the event of a power failure, the data context reverts to its initial state, including the date and time, which causes the application to perform a cold restart. Description: page 24 Characteristics: pages 25 to 27 Dimensions: page 30 Connections: page 31 References: pages 32 and 33 29
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Twido Programmable controller

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