Publication 1763-RM001C-EN-P - October 2009
140 Using High-Speed Outputs
PTO Operating Frequency Status (OFS)
The PTO OFS (Output Frequency Status) is generated by the PTO
sub-system and can be used in the control program to monitor the actual
frequency being produced by the PTO sub-system.
PTO Total Output Pulses To Be Generated (TOP)
The PTO TOP (Total Output Pulses) defines the total number of pulses to
be generated for the pulse profile (accel/run/decel inclusive).
ATTENTION
In order to use 40kHz PTO and PWM with a prior version
of RSLogix 500 (version 7.10 or lower), variable type
change process is required (unsigned integer to signed
integer). Refer to PTO and PWM function file changes in
Series B Controller on page 569 in Appendix F How to Use
40kHz PTO/PWM of MicroLogix 1100 Series B Controller
for more information.
Sub-Element Description Address Data Format Range Type User Program Access Controller
Series
OFS - Operating Frequency Status (Hz) PTO:0.OFS word (INT) 0 to 20,000 status read only A
word (UINT) 0 to 40,000 B
TIP
The value displayed may not exactly match the value
entered in the PTO:0.OF. This is because the PTO
sub-system may not be capable of reproducing an exact
frequency at some of the higher frequencies. For PTO
applications, this is typically not an issue because, in all
cases, an exact number of pulses are produced.
Sub-Element
Description
Address Data
Format
Range Type User
Program
Access
TOP - Total Output
Pulses To Be Generated
PTO:0.TOP long word
(32-bit INT)
0 to 2,147,483,647 control read/write
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive
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