Publication 1766-RM001A-EN-P - October 2008
Using High-Speed Outputs
149
PTOX Normal Operation Status (NS)
The PTOX NS (Normal Operation Status) bit is controlled by the PTO
sub-system. It can be used by an input instruction on any rung within the
control program to detect when the PTO is in its normal state. A normal
state is ACCEL, RUN, DECEL or DONE, with no PTO errors. The NS bit
operates as follows:
•
Set (1) - Whenever a PTO instruction is in its normal state
•
Cleared (0) - Whenever a PTO instruction is not in its normal state
PTOX Enable Hard Stop (EH)
The PTOX EH (Enable Hard Stop) bit is used to stop the PTO sub-system
immediately. Once the PTO sub-system starts a pulse sequence, the only
way to stop generating pulses is to set the enable hard stop bit. The
enable hard stop aborts any PTO sub-system operation (idle, normal, jog
continuous or jog pulse) and generates a PTO sub-system error. The EH
bit operates as follows:
•
Set (1) - Instructs the PTO sub-system to stop generating pulses
immediately (output off = 0)
•
Cleared (0) - Normal operation
PTOX Enable Status (EN)
The PTOX EN (Enable Status) is controlled by the PTO sub-system. When
the rung preceding the PTO instruction is solved true, the PTO instruction
is enabled and the enable status bit is set. If the rung preceding the PTO
Sub-Element Description
Address
Data Format Range Type
User Program
Access
NS - Normal Operation Status
PTOX:0/
NS
bit
0 or 1
status read only
Sub-Element
Description
Address
Data Format
Range
Type
User Program
Access
EH - Enable Hard Stop
PTOX:0/EH bit
0 or 1
control
read/write
Sub-Element
Description
Address
Data Format
Range
Type
User Program
Access
EN - Enable Status
(follows rung state)
PTOX:0/EN bit
0 or 1
status
read only
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