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Monitoring and Operating the Controller
92 UDC2500 Universal Digital Controller Product Manual 4/07
Individual key lockout
There are three keys that can be disabled to prevent unauthorized changes to the
parameters associated with these keys. First set the “Lock” prompt to NONE.
These keys are:
Run
Hold
Run
Hold
Run
Hold
Key - you can disable the Run/Hold key for Set Point
Programming at configuration Set Up group prompt
“Tuning,” function prompt “RN HLD.”
M-A
Reset
M-A
Reset
M-A
Reset
Key - you can disable the Auto/Manual key at configuration Set
Up, group prompt “Tuning”, function prompt “AUTOMA”
SP
Select
SP
Select
SP
Select
Key - you can disable the Set Point Select function key at
configuration Set Up group prompt “Tuning,” function
prompt “SP SEL.”
See Subsection 3.4 - Tuning Parameters Set Up Group prompts to enable or disable
these keys.
Key error
When a key is pressed and the prompt “Key Error” appears in the lower display, it will be
for one of the following reasons:
• Parameter not available or locked out
• Not in setup mode, press SET UP key first
• Individual key locked out.