Status Byte

Message Available (MAV)

This bit is TRUE whenever the power supply is ready to accept a request by the Digital Programming Interface to output data bytes. This message is FALSE when the output queue is empty.

Standard Event Status Summary (ESB)

This bit is TRUE when a bit is set in the Standard Event Status Register.

Master Summary Status (MSS)

This is caused by one of the following:

• Status Byte bit 0 AND Service Request Enable Register bit 0

• Status Byte bit 1 AND Service Request Enable Register bit 1

• Status Byte bit 2 AND Service Request Enable Register bit 2

• Status Byte bit 3 AND Service Request Enable Register bit 3

• Status Byte bit 4 AND Service Request Enable Register bit 4

• Status Byte bit 5 AND Service Request Enable Register bit 5

• Status Byte bit 7 AND Service Request Enable Register bit 7.

Request Service (RQS)

RQS is TRUE if the Service Request Enable Register has a bit set and

5

there is a corresponding bit within the Status Byte.

M370078-01

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Xantrex Technology XG 850 manual Message Available MAV, Standard Event Status Summary ESB, Master Summary Status MSS