Elgas EDT 101, Руководство пользователя

Страница: 26 / 40

26
4.4.8 Unlock user configuration section
Forcing the Unlock user configuration section coil ON when the correct value is written in the
Password registers unlocks the user configuration section of registers 40062 – 40066 for write
operation.
To unlock and write into the User configuration section, the following procedure has to be
executed:
1. Write correct password into registers 40067 – 40068 using the Write multiple registers
command
2. Force coil 0017 (Unlock user configuration section) ON. If the password is correct, the
normal response is returned and the desired section is unlocked. If the password is
incorrect, the exception response 03 – Illegal data is returned and the section remains
locked.
3. Write memory locations in the User configuration section by the Write multiple registers
command.
The section is then unlocked only for one Write multiple registers command. After the Write
command is complete, the section is locked automatically. If another write to the protected
section is required, the steps 1 to 3 must be repeated.
4.4.9 Unlock service configuration section
Forcing the Unlock service configuration section coil ON when the correct value is written in
the Password registers unlocks the service and user configuration sections of registers
40055 – 40066 for write operation.
To unlock and write into the User configuration section, the following procedure has to be
executed:
1. Write correct password into registers 40067 – 40068 using the Write multiple registers
command
2. Force coil 0018 (Unlock service configuration section) ON. If the password is correct, the
normal response is returned and the desired section is unlocked. If the password is
incorrect, the exception response 03 – Illegal data is returned and the section remains
locked.
3. Write memory locations in the service and / or user configuration section by the Write
multiple registers command.
The section is then unlocked only for one Write multiple registers command. After the write
command is complete, the section is locked automatically. If another write to the protected
section is required, the steps 1 to 3 must be repeated.
4.4.10 Change password
Forcing the Change user password coil or Change service password coil ON changes password
for the particular section of registers. The change password procedure is similar for both
section passwords, therefore only the Change user password function is described.