Password Lock And Unlock; Lock; Unlock - Johnson Controls Penn VFD68D Series Technical Bulletin

Password Lock and Unlock

Lock

1. Set the parameter restriction level as shown in Table 84.
Table 84: Set Password Restriction Level (P.296)
P.296 Setting
1 to 6
101 to 106
1. If the password unlock error has occurred five times, see Perform a Parameter All Clear to unlock the restriction.
Entering the correct password after the fifth incorrect entry has no effect.
2. Enter a four-digit number (1000 to 9998) as a password.
• When a password is registered, parameter reading and writing is restricted with the restriction level set
in P.297 until unlocking.
• After registering a password, a read value of P.297 is always 0 to 5.
• When a password-restricted parameter is read or written, LOCd appears on the display.
• Even if a password is registered, parameters that the VFD itself writes, such as VFD Parts Life, are
overwritten occasionally.

Unlock

You can unlock the password one of two ways:
• enter a password in P.297
• perform a parameter all clear (see Perform a Parameter All Clear on page 89.)
Enter a Password in P.297
Entering a correct password in P.297 unlocks the VFD and sets P. 297 back to 9999 (no password lock). You
must enter a setting from 1000 to 9998 again for this parameter to register a new 4-digit password. Entering an
incorrect password:
• (when P.296 = 1 to 6) creates a password unlock error, but does not lock the VFD. If the correct password
is eventually entered, the VFD68 will unlock.
• (when P.296 = 101 to 106) creates a password unlock error.
Note: If the password unlock error has occurred five times, the VFD password function locks, and you
must perform a Parameter All Clear to unlock the restriction (see Perform a Parameter All Clear on
page 89). Entering the correct password after the fifth incorrect entry has no effect.
Perform a Parameter All Clear
• If you forgot the password, perform a parameter all clear to unlock the parameter restriction.
Note: When you perform a parameter all clear, all parameters are restored to the default values.
• Parameter all clear cannot be performed while the VFD has an active voltage output.
Restriction of Password Unlock
Error
No restriction
1
Restricted at fifth error
VFD68 Variable Frequency Drives
89
P.297 Display
Always 0
Displays error count (0 to 5)