Software Functions The Varispeed AC matrix converter (MxC ) incorporates a variety of application features. Select special functions from a multitude of possibilities to perfectly match your machine requirements. Varispeed AC ( MxC ) R/L1 U/T1 V/T2 W/T3 Digital Operator S/L2 T/L3 M to : In this brochure, the Varispeed AC matrix converter is hereinafter referred to as the MxC.
Multi-function Selection by Contact Input S4 S3 S5 PG Option S6 S7 S12 AM FM AC Analog Output Analog Input A1 A2 A3 Option Card M1 M2 P1 R + R - AC PC P3 C3 P2 Multi-function Signal Output MEMOBUS Communication S + S - IG C4 P4 Output Option Input Option 12 Function Target Market Application Description of Function Multi-Function Selection PID Control Pumps, air conditioning, etc. Automatic process control Processes PID operations in the MxC and uses the results as frequency references. Controls pressure and air/water quantities. Speed Search Operation Inertia load drives such as blowers, etc.
Starting a free running motor Starts the MxC at the specified frequency, automatically detects the synchronization point, and performs at the operation frequency. No speed detector is required. DC Injection Braking at Start Blowers, pumps, etc. which have wind-mill effects Starting a free running motor When the direction of the free running motor is not fixed, the speed search operation function is difficult to use. The motor can be automatically stopped by DC injection braking, and restarted by the MxC. Commercial Power Source/MxC Switchover Operation Blowers, pumps, mixers, etc.
Automatic switching between commercial power source and MxC Switching of commercial power source to MxC or vice versa is enabled without stopping the motor. Multi-step Speed Operation Transporting equipment Scheduling operations under fixed speeds Multi-step operation (up to 17-step) can be programmed by setting the contact combinations, and the connection with the PLC is simplified. When combined with limit switches, can also allow simple positioning. Accel/Decel Time Changeover Operation Automatic control panels, transporting equipment, etc. Accel/decel time changeover with an external signal The accel/decel times are switched by an external contact signal.
Necessary for smooth acceleration or deceleration at high speeds. MxC Overheat Prediction Air conditioners, etc. Preventive maintenance When the ambient temperature of the MxC rises to within 10˚C of the maximum allowable temperature, a warning is given. (Thermoswitch is required as an option.) 3-wire Sequence General Simple configuration of control circuit STOP RUN S1 RUN Operation can be accomplished using S2 STOP a spring-loaded push-button switch. S5 FWD/REV SC Operating Site Selection General Easy operation Operation and settings (digital operator/external instruction, signal input/option) can be selected while the MxC is online.
Frequency Hold Operation General Easy operation Temporarily holds frequencies during acceleration or deceleration. UP/DOWN Command General Easy operation Sets speed by ON/OFF from a distance. Fault Trip Retry Operation Air conditioners, etc. Improvement of operation reliability When the MxC trips, it begins to coast, is immediately diagnosed by the computer, resets automatically, and returns to the original operation speed. Up to 10 retries can be selected.
Torque Limit (Drooping characteristics) Pumps and blowers Protection of machine Improvement of continuous operation reliability Torque limit The output frequency can be automatically reduced to the balancing point of the load in accordance with the overload as soon as the motor torque reaches a preset level. Needed to prevent overload tripping in applications such as pumps or blowers.