Allen-Bradley MicroLogix 1400 User Manual

Publication 1766-RM001A-EN-P - October 2008
632 Knowledgebase Quick Starts
# 17446 “Quick Start”
Pulse Width Modulation
(PWMX)
NOTE: The PTO and PWM functions are only available when using the
BXB or BXBA models of the MicroLogix 1400.
Locate the Function Files under Controller in RSLogix 500/RSLogix Micro
v8.10.00 or later and select the PWMX tab, then select the [+] next to
PWMX:0 (See Below).
Enter the following parameters as the “Minimum Configuration” required
for the PWM to generate a waveform at the specified frequency.
PWMX:0.OUT Select Destination Output for pulses: Output O:0/2, O:0/3 or O:0/4
PWMX:0.OFS Output Frequency - Frequency of the PWM: 0…40,000 Hz
PWMX:0.DC PWM Duty Cycle - Controls the output signal of the PWM: 1…1000
DC = 1000 100% Output ON (Constant no waveform)
DC = 0750 075% Output ON 025% Output OFF
DC = 0500 050% Output ON 050% Output OFF
DC = 0250 025% Output ON 075% Output OFF
DC = 0000 000% Output OFF (Constant no waveform)
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Allen-Bradley MicroLogix 1400 Specifications

General

Processor	32-bit
Expansion Modules	Up to 7 expansion I/O modules
Power Supply	24V DC or 120/240V AC
Programming Software	RSLogix 500
Communication Ports	Ethernet, RS-232/RS-485 combo port
Controller Type	Programmable Logic Controller (PLC)
Series	MicroLogix
Digital Outputs	12
Analog Inputs	6 (embedded)
Analog Outputs	2 (embedded)
High-Speed Counter	6 high-speed counters
Pulse Output	2 (embedded)
Ethernet Port	Yes