Publication 1766-RM001A-EN-P - October 2008
Knowledgebase Quick Starts 631
The following ladder logic will need to be entered into File #2
By toggling Bit B3/0 the PTO can be activated. Once running the PTO
will generate the number of pulses entered into the PTOX:0.TOP long
word and then stop. To restart, toggle B3/0.
General Information on the PTO
Once running the PTO will continue to generate pulses until all pulses
have been generated or the PTOX:0/EH (Enable Hard Stop) bit has been
activated.
Once the EH bit is set the instruction will generate a PTO error of 1 (hard
stop detected). In order to clear this error the PTO instruction must be
scanned on a false rung of logic, and the EH bit must be off.
To change the Total Output Pulses Generated in a working program a
new value can be moved into PTOX:0.TOP by using the MOV command.
Important Note:
Once the PTO has been initiated and is generating
pulses a new TOP value will not take effect until the PTO has either
completed generating pulses and has been restarted or has been Hard
Stopped using PTOX:0/EH bit and been restarted.
efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive
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