Watlow CLS200 - Manual (Page 80)

Chapter 3: Using the CLS200 CLS200 Series User’s Guide
64 Watlow Anafaze Doc.# 0600-3050-2000
2. Ensure the loop’s process variable is stable and the
loop is in
MAN control status.
3. Set the setpoint to a value as near the normal operat-
ing temperature as is safe for the system.
WARNING! During autotuning, the controller will set the
output to 100% until the process variable rises
near the setpoint. Set the setpoint within the
safe operating limits of your system.
4. Use the three-key sequence ( ENTER, ALARM ACK, CHNG
SP) to access the setup menus. In the SETUP LOOP
INPUT menu, locate the INPUT FILTER parameter.
Note the setting and then change it to 0 SCANS.
5. Press the BACK key until the single loop display appears.
6. Press the
MAN/AUTO key.
7. Press the NO key to toggle to the TUNE mode.
8. Press the
ENTER key to begin tuning the loop. TUNE
flashes throughout the tuning process. When tuning is
completed the control status indicator changes to
AUTO.
9. Adjust the setpoint to the desired temperature.
10. Restore the INPUT FILTER parameter to its original value.
Using Alarms
The CLS200 has three main types of alarms:
• Failed sensor alarms
• Process alarms
• System alarms
Alarm Delay
You can set the controller to delay normal alarm detection
and alarm reporting. There are two kinds of alarm delay:
• Start-up alarm delay delays process alarms (but not
failed sensor alarms) for all loops for a time period you
set at the STARTUP ALARM DELAY parameter in the
SETUP GLOBAL PARAMETERS menu.
• Loop alarm delay delays failed sensor alarms and pro-
cess alarms for one loop until the alarm condition is
continuously present for longer than the loop alarm
delay time you set.
Failed sensor alarms are affected by the loop alarm delay
even during the start-up alarm delay time period.