Xantrex Technology RS232-XPD manual Accumulated Status, Status, and Fault Registers

Operation

Accumulated Status, Status, and Fault Registers

Accumulated Status, Status, and Fault Registers

The RS-232 option card uses three separate registers which are always active. They are the accumulated status, status, and fault registers. You can use the status commands shown in Table 3.6, “Status Commands” to activate the registers. The bit register has twelve conditions, each assigned a bit weight. When querying a register, the controller returns a response which is the sum of the weights of all relevant conditions.

Example:

ASTS?	Query the Accumulated Status register.
ASTS 771	Controller response.

771 = 512 + 256 + 2 + 1 = PON + REM + CC + CV

The accumulated status register shows that PON, REM, CC and CV have all been active since the last accumulated status register query.

Table 3.8 shows the mnemonics and bit weights which correspond to each register condition. You can select conditions you want to monitor in the fault and status register by using the MASK and UNMASK commands.

Release 1.2 47