48
Rev G
S6−
−−
−TR400 Diagnostics
Setting and changing the security code number
Overview
The TR400 can be programmed to prevent unauthorized changes to its operational
variables by setting the keypad lockout function, using a security code number.
There are three elements to enable or disable the keypad lockout function: variable
05 (selectable lockouts), variable 00 (security access number), and the location
where you set up the security code number, which will be in Diagnostics.
Variable 05,
keypad lockout
Variable 05 is used to select the function keys that are enabled or disabled when
security is set.
Display Characters
Variable Key
(Variables can be viewed but not changed.)
10 0 1
0 = Unlocked
1 = Locked
Diagnostic Key
The default value for variable 05 is “0011,” as shown above. This level of security
prevents two things:
•
Changing the variables (except variable 00) and allowing them to be viewed
only.
•
Entering Diagnostics Mode.
Variable 00,
security code
number and
location
The Security Code Number is a number chosen by you. The default number is 0400.
After you enter a new security code number to “enable” the keypad lockout function
in Diagnostics Mode, you must enter that same number into variable 00, to “disable”
the keypad lockout function.
For example, if you enter 0401 into Diagnostics Mode for your security code number
(which will enable the keypad lockout function) you must enter “0401” into variable
00 when you want to disable the keypad lockout function, which allows you access
to all keys.
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