SLVUAW9C September 2016 – February 2020 UCD90320
This Read/Write Block common command allows certain commands to be write-protected. The data for this command is a 6-byte binary string containing the password. The password is stored in nonvolatile memory, and is used to secure the unit against unauthorized modification of its settings.
While security is turned on, attempting to write to a protected command while security is on results in a NACK. There is an exception for protected “Send Byte” commands. They do not return a NACK, but they are ignored.
These are the only commands that can be written when security is enabled:
CLEAR_FAULTS
GPIO_SELECT
GPO_CONFIG_INDEX
LOGGED_FAULT_DETAIL_INDEX
OPERATION
PAGE
PARM_INFO
PWM_SELECT
READ_TEMPERATURE_2
RESEQUENCE
RUN_TIME_CLOCK
SECURITY
STORE_DEFAULT_ALL
SYSTEM_WATCHDOG_RESET
USER_RAM_00