Allen-Bradley MicroLogix 1100 Instruction Set Reference Manual

Publication 1763-RM001C-EN-P - October 2009
148 Using High-Speed Outputs
PTO Error Code (ER)
PTO ER (Error Codes) detected by the PTO sub-system are displayed in
this register. The error codes are shown in the table below:
Sub-Element
Description
Address Data Format Range Type User Program
Access
ER - Error Code PTO:0.ER word (INT) -3 to 7 status read only
Pulse Train Output Error Codes
Error
Code
Non-User
Fault
Recoverable
Fault
Instruction
Errors
Error
Name
Description
-3 No Yes Yes Undefined
Accel/
Decel
Acceleration Count and Deceleration not defined during going to run mode
when Accel/Decel Pulses Independent (ADI) is set (1).
-2 Yes No No Overlap
Error
An output overlap is detected. Multiple functions are assigned to the same
physical output. This is a configuration error. The controller faults and the
User Fault Routine does not execute. Example: PTO0 and PTO1 are both
attempting to use a single output.
-1 Yes No No Output
Error
An invalid output has been specified. Output 2 and output 3 are the only valid
choices. This is a configuration error. The controller faults and the User Fault
Routine does not execute.
0 --- --- Normal Normal (0 = no error present)
1 No No Yes Hardstop
Detected
This error is generated whenever a hard stop is detected. This error does not
fault the controller.
To clear this error, scan the PTO instruction on a false rung and reset the EH
(Enable Hard Stop) bit to 0.
2 No No Yes Output
Forced
Error
The configured PTO output (2 or 3) is currently forced. The forced condition
must be removed for the PTO to operate.
This error does not fault the controller. It is automatically cleared when the
force condition is removed.
3 No Yes No Frequency
Error
The operating frequency value (OFS) is less than 0 or greater than 20,000.
This error faults the controller. It can be cleared by logic within the User Fault
Routine.
4 No Yes No Accel/
Decel
Error
The accelerate/decelerate parameters (ADP) are:
•less than zero
•greater than half the total output pulses to be generated (TOP)
•Accel/Decel exceeds limit (See page 142.)
This error faults the controller. It can be cleared by logic within the User Fault
Routine.
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Allen-Bradley MicroLogix 1100 Specifications

General

Processor	32-bit
Programming Software	RSLogix 500
Mounting	DIN rail or panel mount
Power Supply	24V DC
Type	Compact PLC
Digital Inputs	12
Digital Outputs	8
Analog Inputs	4 (depending on model)
Analog Outputs	Optional with expansion module
Programming Language	Ladder Logic
Operating Temperature	0 to 55 °C (32 to 131 °F)
Series	MicroLogix