Monitoring and Operating the Controller
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
Key | - you can disable the Run/Hold key for Set Point |
| Programming at configuration Set Up group prompt |
| “Tuning,” function prompt “RN HLD.” |
Reset
Key | - you can disable the Auto/Manual key at configuration Set |
| Up, group prompt “Tuning”, function prompt “AUTOMA” |
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.
92 | UDC2500 Universal Digital Controller Product Manual | 4/07 |