Indicators, Key functions, Outputs – Despatch Protocol Plus Controller (Heat Only) User Manual

Page 16

HEORY OF

PERATION

Protocol Plus Owner’s Manual

Version 2

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means including graphic, electronic, or mechanical methods or photocopying, recording, or information storage and
retrieval systems without the written permission of Despatch Industries, unless for purchaser's personal use.

3.4. Indicators

Refer to Figure 2:

· Power LED: Indicates power supplied to instrument

· Heater LED: Indicates heater output active

· Profile LED: Indicates Profile Mode is in operation
· Timer LED: Indicates Timer Mode is in operation

· Manual LED: Indicates Manual Mode is in operation

· Cycle Complete LED: Indicates control is in Stopped or Standby modes.

· Hi-Limit Alarm LED: Indicates high limit relay has tripped (de-energized).

· Soak Alarm LED: Indicates the guaranteed soak deviation is in alarm condition.

· Outputs 1 through 4: Indicate that the optional relay outputs are in the ON state.

These outputs may be configured as timed event outputs, process temperature trip
point outputs, alarm outputs, or as an end of cycle relay output. The ON state can be
configured as energized or de-energized.

3.5. Key Functions

Refer to Figure 2:

Select

: Press to select mode of operation. In Setup Mode, to select profile number or

relay. In Profile/Run Mode, press simultaneously with the UP key to advance a
segment.

Run/Hold

: Press to activate a mode of operation. If a Profile (or Timer) Mode is

running, pressing the Run/Hold key will place the Profile (or Timer) in Hold status. A
subsequent press will resume the Profile (Timer).

Stop

: Press to stop any mode of operation.

Page/Reset

: While in Setup Mode, press to access different Pages of configuration,

Press this key to silence an alarm if the instrument alarm sounds during operation. In
an operating mode, if an alarm or error condition occurs, press this key to return the
instrument to normal operation once the condition is cleared.

Menu/View

: While running any operating mode, pressing this key will display the high

limit setpoint. While in Setup Mode, pressing this key will provide access to each
Menu parameter.

▲▼

: Press to adjust parameter settings. In Profile/Stopped Mode, press to select

profile to run. In Profile/Run Mode, press

▲

simultaneously with

Select

to force the

program to advance one segment.

3.6. Outputs

The Protocol Plus controller comes standard with an output signal that can transmit
temperature data to a user-supplied recording device. Optional output relays (four) can
also signal user-specified events or alarm to external devices (Figure 5).