Installation manual

Introduction
900M050U00  Athena Controls, Inc. 1-17
1.9 What Happens When You Power Up the Controller
1.9.1 Outputs
When the controller is powered up, under some circumstances the outputs may be
activated. If the controller has been configured, this is good. However, if the controller is
new (not yet configured), then we recommend placing the controller in standby mode until
you have configured the controller for your application.
For instructions for putting a 16C, 18C, or 25C controller in standby, see 2.4.3.
To put a 1ZC in standby mode, issue the appropriate command from a MODBUS master
or the Multi-Comm host computer.
1.9.2 Display
When a 16C, 18C, or 25C controller is first powered up, all segments of both lines of the
LED display will be lit briefly while the controller goes through a series of self-diagnostics.
Next the top line briefly displays the type of controller, while the lower line displays a
firmware version number.
9
Next, the top line will display 00000000, while the lower line
displays the type of communication protocol the controller supports. Finally, the process
variable (PV) and process setpoint value (SV) are displayed. This is the normal operator
display. See 2.2 for more information about the controller displays.
1.9.3 Setpoint
Once the controller has been configured, its behavior at startup depends on the choices
made during configuration.
The controller can be configured to ramp gradually up to the setpoint after the controller
is powered up.
If this single-setpoint ramp function has not been enabled as described in 11.3, then the
controller’s control algorithm will use the outputs to achieve the configured setpoint using
the configured control strategy as quickly as possible. See 1.6 for information about the
possible sources of the active setpoint.
9
It is a good idea to make a note of this number. If you phone for technical support you will be asked for
this version information, as well as for the complete model number of the controller in question.