Eaton XN300 Manual

Also see for XN300: Manual Instruction manual

34 DC motor driver module XN-322-1DCD-B3534.3 Wiring topicXN300 slice modules 02/24 MN050002EN Eaton.com 26834.3.4 How the XN-322-1DCD-B35 worksXN-322-1DCD-B35 slice modules can be used to run a brushed DC motorwith a rated operational current of up to 3.5 and an operational voltage of upto 30 VDC. The motor can be driven in the following way:• pulse width modulationWhen using pulse width modulation, the manipulated variable is controlledby using variable pulse widths while keeping a constant period duration. Themanipulated variable in this case is the power delivered to the motor.The duration of the 4 steps, i.e., the sequence time, is specified in registers0x32E0 to 0x20E3 with 11 bits. Meanwhile, the period duration is defined,relative to the internal clock frequency of 32 MHz, in register 0x20E4 with 16bits.Generating the output signal for the motor driveThe PWM output sequence for driving the motor is transmitted to the XN300module with four subsequences using four objects, 0x20E0 to 0x20E3.These subsequences are grouped together in a fixed order in order to makeup the output sequence, with each of the subsequences containing thefollowing information:• Operating direction: Definition of operating direction by activating theoutput driver.• Time reference:• Relative: The sequence time's starting point will be the end of theprevious sequence.• Absolute: The sequence time's starting point will be the start of theperiod. The duration of previous sequences must be taken intoaccount.• Sequence time: The sequence time, relative to the internal clockfrequency of 32 MHz, is defined in an 11-bit register. (min: 29hex (1.3 μs),max: (63.9 μs))If the defined period duration is shorter than the time defined with thesequences, the sequence will be interrupted and restarted at the end of theperiod duration.The operating direction is defined with the states of bits 12 to 15 in thesequence register.Figure 143: Pulses at output terminal X1, pin M+ module outputPD: Period duration01PDPW PW