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Allen-Bradley MicroLogix 1400 User Manual

Allen-Bradley MicroLogix 1400
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Publication 1766-RM001A-EN-P - October 2008
Using High-Speed Outputs 163
PWMX Idle Status (IS)
The PWMX IS (Idle Status) is controlled by the PWM sub-system and
represents no PWM activity. It can be used in the control program by an
input instruction.
• Set (1) - PWM sub-system is in an idle state.
• Cleared (0) - PWM sub-system is not in an idle state (it is running).
PWMX Error Detected (ED)
The PWMX ED (Error Detected) bit is controlled by the PWM sub-system.
It can be used by an input instruction on any rung within the control
program to detect when the PWM instruction is in an error state. If an
error state is detected, the specific error is identified in the error code
register (PWMX:0.ER).
• Set (1) - Whenever a PWM instruction is in an error state.
• Cleared (0) - Whenever a PWM instruction is not in an error state.
PWMX Normal Operation (NS)
The PWMX NS (Normal Operation) bit is controlled by the PWM
sub-system. It can be used by an input instruction on any rung within the
control program to detect when the PWM is in its normal state. A normal
state is defined as ACCEL, RUN, or DECEL with no PWM errors.
• Set (1) - Whenever a PWM instruction is in its normal state.
• Cleared (0) - Whenever a PWM instruction is not in its normal state.
Element Description Address Data Format Range Type User Program
Access
IS - PWM Idle Status PWMX:0/IS bit 0 or 1 status read only
Element Description Address Data
Format
Range Type User Program
Access
ED - PWM Error Detection PWMX:0/ED bit 0 or 1 status read only
Element Description Address Data
Format
Range Type User Program
Access
NS - PWM Normal Operation PWMX:0/NS bit 0 or 1 status read only
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Allen-Bradley MicroLogix 1400 Specifications

General IconGeneral
Processor32-bit
Expansion ModulesUp to 7 expansion I/O modules
Power Supply24V DC or 120/240V AC
Programming SoftwareRSLogix 500
Communication PortsEthernet, RS-232/RS-485 combo port
Controller TypeProgrammable Logic Controller (PLC)
SeriesMicroLogix
Digital Outputs12
Analog Inputs6 (embedded)
Analog Outputs2 (embedded)
High-Speed Counter6 high-speed counters
Pulse Output2 (embedded)
Ethernet PortYes

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