Installation manual

Quick Setup Instructions
900M050U00  Athena Controls, Inc. 3-5
9. Make your choice of Autotune damping setting. Use this parameter to specify how
aggressively the conroller will perform Autotune.
a) Press the key repeatedly until tunetune is displayed on the top line.
b) Display the current setting for the Autotune damping parameter by pressing the
key. The parameter abbreviation dPn9dPn9 will alternate with the current setting,
LoLo (low), nLnL, (normal) or HiHi (high).
c) Use the or key to display the appropriate setting for your application.
• Low provides fastest recovery, but with the possibility of overshoot.
• High provides little or no overshoot, but with slower recovery.
• Normal is a compromise between fast recovery and overshoot.
10. Autotune the controller while the setpoint is at least 1% of the sensor span above or
below the process value. This will set the tuning parameters: proportional band,
derivative action (rate) and integral action (auto reset). (More detailed instructions for
Autotuning are in 16.2.)
a) Press and hold the key (approximately three seconds) until the top line of
the display shows StbYStbY alternating with the process value and the lower line
displays the setpoint.
b) Use the and keys to change the setpoint to a value that will be used by
your application.
c) Press and hold the key until the top line displays CtrLCtrL and the lower line
displays StbYStbY.
d) Use the or key to step through the modes until AtunAtun is displayed.
e) Press the key to start the autotuning operation. The display will flash tunetune.
f) Do not press any keys while the Autotune is in progress, unless you want to stop
the autotuning by putting the controller into standby or manual mode. When the
controller has completed autotuning successfully, the flashing tunetune will
disappear. The display will revert to the normal mode operating display, with the
process value on the top line and the setpoint on the lower line.
If the Autotune was unsuccessful, the top line will briefly display ErEr plus a two-
digit error code, then go back to flashing StbYStbY. Refer to Section 16 for the
Autotune error codes. Fix the problem and try tuning again.
Once Autotune has been completed successfully, and the PV and SV are on display, the
controller is controlling the process.
Monitor the process. If unacceptable overshoot occurs, change the Autotune damping
setting to high and repeat the Autotune. If the process response is sluggish, change the
damping setting to low and repeat the Autotune.
Once setup is complete, we recommend changing the security access level to the most
restrictive level suitable for your application. See Section 17 for details.