Watlow Series 1500 User Manual download pdf (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,

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

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

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,"

any other combination of 1

and/or

0’s.

You program Event Outputs

in.

the Change

Data Mode.

When DIP Switch #1 is ON, Event

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

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