Electro Cam PL-1746 Series - Manual (Page 78)

4-33 PLS Functions
Pulses (cont’d)
Changing Pulse Edges
Change an edge value with the numeric keys followed by ENT, or with the INC and
DEC keys.
Pulse Modes
The Pulse Mode controls how the INC and DEC keys modify pulses. There are three
modes; EDG (edge), PUL (pulse), and CHN (channel.) Change the Pulse Mode by
pressing the SEL key when the cursor points to the Pulse Mode.
In EDG mode, the INC and DEC keys will affect the selected ON or OFF edge only.
In PUL mode, both ON and OFF edges will be incremented or decremented simulta-
neously.
In CHN mode, all ON and OFF edges for all pulses in the channel will be incremented
or decremented simultaneously.
Deleting a Pulse
A pulse may be deleted by making ON equal to OFF, or vice versa. If there is more than
one pulse in the channel, the next pulse will appear in the on/off edges area. If the
channel has no more pulses, the ON and OFF edges will both be zero.
Clearing a Channel
To clear a channel of all pulses, enter a new pulse with ON and OFF edges of “0.”
Channel Always ON
A channel may be programmed to be on for a full revolution (always on) by entering a
new pulse with both ON and OFF =edges equal to “1.”
Programming Recommendations
For most installations, before programming edges, it is best to set MACHINE POSI-
TION to zero at the start of a machine cycle. This allows you to jog the machine to
various points in the machine cycle where output channels must turn on or off, note
these machine positions from the PL-1746 display, and enter them into pulse program-
ming. Pulses programmed in this manner will relate directly to the machine position. If
pulses are programmed before MACHINE POSITION is set, and MACHINE POSITION
is subsequently changed, the pulses will no longer correlate with the machine zero
position. The same logic applies if GROUP OFFSET will be used for individual output
groups. Program the group offsets before establishing pulses for the channels in the
groups.
Description This set of screens provides a means to add pulses to channels, edit existing pulses,
increment or decrement pulses in one of the three modes, delete pulses, clear a chan-
nel, or turn a channel ON all the time.