Watlow Electric Ramping and Profiling Microprocessor-Based Control SERIES 1500 - Manual (Page 51)

Technical Reference
Event Outputs
One of the most versatile features of the Series 1500 is its capability for event
outputs. An “event output” is simply a preprogrammed ON/OFF event. There are
eight total, four for each channel during each individual step. The event may turn any
number of peripheral devices ON or OFF to assist you in controlling your process,
system or environment.
For instance, in a closed environmental chamber, you might wish to circulate air at a
given time in your program for one or more steps. You might want to turn lights ON or
OFF, or signals, or lock out your humidifier, or you could activate a video recorder.
If the events are programmed for one step and left unprogrammed for the next step,
the events will repeat the last programmed sequence. The Output Event LEDs, to
the right of the ACTUAL display, are visible only when the outputs are active during a
program run.
These event outputs have solid-state switching rated at 0.5 amps up to 115VAC or
240VAC.
Program the Events in the CHG DATA Mode, entering them in a 1=ON, O=OFF
manner for each step. The four place DATA display shows the ON/OFF status
(reading from left to right) beginning with Event Output # 4 on the left and so on.
Thus, with the El or E2 prompts, the DATA display will read “1001” or "0011," or
any other combination of 1 's and/or 0’s. You program Event Outputs in. the Change
Data Mode.
When DIP Switch #1 is ON, Event # 4 is an alarm output and is not available to program
as an event.
When these Event Outputs are actually ON during a running program, you can see
them displayed in the EVENT box in the upper righthand corner of the front panel.
Event Input
The event input allows the Series 1500 to be programmed to wait at that point in the
profile until the external condition occurs. It can be programmed to wait for a switch
closure or opening.
Remote Hold Input
Closing the remote hold input switch will cause the Series 1500 to pause until the
switch opens. This is indicated by a flashing “RUN/HALT" LED. While in this
condition, the Series 1500 will actively maintain the set point and event output
conditions which exist.
Event Outputs, Chapter 4 WALTOW Series 1500 User's Manual
51