Installation manual

Series C Controller Configuration and Operation Manual
1-14  Athena Controls, Inc. 900M050U00
• event – This special use of an alarm indicates that the controller has reached
a particular point in a ramp/soak recipe. Setting the alarm action to “event”
reserves the alarm for use by a ramp/soak recipe. However, the specific
recipe event(s) that will trigger the alarm are configured using the r-Sr-S
(ramp/soak) menu as described in Section 11.
1.7.2 Using an Output to Trigger an External Device
1.7.2.1 Introduction
The 1ZC, 16C, 18C, and 25C models can all be configured to use one or two outputs
connected to external devices to annunciate alarms. However, which outputs can be
used for alarms depends on the model and the hardware options selected.
1.7.2.2 Using Alarm Outputs
The 16C, 18C, and 25C controllers can all be ordered with two dedicated alarm outputs.
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The operation and action of these outputs is tied to the alarm menu parameters that
affect alarm annunciation using the LEDs.
For example, suppose a controller is configured to light LED A1 if the PV falls 20 units
below the process setpoint. If the controller is equipped with optional alarm outputs that
are normally open relays, then when the PV falls too much and the LED is lit, the alarm 1
relay contact will be closed.
If the alarm action is configured as “normal”, then when the alarm condition clears, the
contact will go back to the normal state. If the alarm action is configured as “latched”, the
contact will remain in the abnormal state until the operator presses the key. The
dedicated alarm outputs will match the LED’s behavior if the alarm is configured to signal
recipe events.
1.7.2.3 Using One or Two Standard Outputs
The 1ZC and 16C models can be configured to use their standard outputs for alarm
annunciation. This feature allows users of the compact 1ZC controller to use an external
device to annunciate alarms, even though the 1ZC is not available with optional alarm
outputs. Even though the 16C is available with dedicated alarm outputs, the ability to
annunciate alarms using the standard outputs is also available on 16C controllers to
accommodate users who network their controllers. Because of its compact size, the 16C
can accommodate optional alarm outputs only if the case does not contain serial
communication hardware. The larger 18C and 25C controllers can accommodate both
the optional serial communications and dedicated optional alarm hardware, so use of
standard outputs for alarm annunciation is not available in these larger models.)
When standard outputs are used for alarm annunciation, the alarms are configured using
alarm parameters on the OutPOutP (output) menu. These output menu alarm parameters
provide the same configuration choices for alarm operation and action as the alarm menu
parameters described in 1.7.1, with the exception of the “event” alarm action. Standard
alarm outputs cannot be used to signal recipe events.
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Refer to the Athena catalog (or the model number breakdown in the installation manuals supplied with
the controllers) for details on the types of outputs available.