Electro Cam PL-1746 Series - Manual (Page 103)

6-6 Groups & Modes
Description For a group in Mode 4, outputs will be enabled to turn
on at their programmed setpoints for one machine
cycle if the corresponding input terminal turns on
within a pulse programmed into the group channel.
Outputs will be disabled at the start of the next pulse
in the group channel.
Applications Use this mode to check the presence and correct po-
sitioning of a product before enabling the outputs for
this machine cycle.
Details • The leading edge of the signal from the input termi-
nal must occur during the pulse in the group chan-
nel. If the leading edge occurs before or after the
pulse, the outputs will not be enabled.
• Each program in the controller can have different
pulses for output channels and group channels.
• If the resolver position is increasing as shaft rotates,
the ON edge of the pulse will disable the outputs. If
the resolver position is decreasing as shaft rotates,
the OFF edge of the pulse will disable the outputs.
• MOTION ANDING and OUTPUT ENABLE ANDING can be used with outputs in a
group operating in mode 4.
• The machine position for a group operating in mode 4 can be set through GROUP
OFFSET programming.
Mode 4 Programming 1. Use OUTPUT GROUPS to establish groups and modes.
2. Use GROUP OFFSET to establish the absolute offset value for any groups operat-
ing in mode 4.
3. Jog the machine to the point where the group input terminal will energize. Program
a pulse in the group channel that will turn on a little earlier than this point, and off a
little later. The shorter the pulse, the narrower the portion of the machine cycle in
which the input signal will enable the outputs.
4. Program pulses into the group’s output channels. Remember that the leading edge
of the pulse in the group channel will disable the output channels in the group.
Mode 4 - One Cycle Enable with Edge-Triggered Input
Mode 4 Example Application
The glue gun will be enabled for one machine cycle
only if the sensor detects the leading edge of a carton
during the pulse programmed in the group channel. If
a carton is missing or incorrectly positioned, the glue
gun will not activate.
Mode 4 operation is appropriate for flight bar
conveyors, rotary index tables, and similar types of
machinery.