TDK 750W HALF RACK technical manual Test if MD Mode is Installed

7.10.4.4Test if MD Mode is Installed

Send AA Hex followed by the address of the supply in binary. If not installed, the supply will re- turn a ‘1’. If installed, the supply will return a‘0’.

7.10.5 Addressed commands without response

7.10.5.1Acknowledge SRQ

Send (0xE0 + Address) (1 byte binary - send 2 times sequentially). The supply will stop re- sending SRQ. If Enable SRQ retransmission is active, it will remain active.

7.10.5.2Re-enable SRQ with out reading/clearing the SEVE Register

Send A5 Hex followed by the address of the supply in binary and new SRQ’s generated by new events in the Fault Event will be enabled without reading and clearing the Status Event Register. All events previously recorded in the Fault Event Register must have been serviced by the user’s software prior to this command to take effect.

Name	Bit Positions	Response	Description
Global
Commands
Disable MD Mode	1010 0000	None	Set supplies out of MD Mode (de-
			fault)
Enable MD Mode	1010 0001	None	Set supplies into MD Mode
Disable SRQ	1010 0010	None	Disable retransmission of SRQs
retransmission			by supplies (default)
Enable SRQ	1010 0011	None	Enable retransmission of SRQs by
retransmission			supplies
Enable FLT Bit	1010 0100	None	Enable the FLT bit in the SENA
			Register
Disconnect serial	1011 1111	OK	All supplies will halt transmission
communications			and enter the non-addressed
			state.
Addressed
Commands
Read Registers	100x xxxx	Register data	Non destructive read of all regis-
			ter. x xxxx is the address of the
			supply in binary.
Re-enable SRQ	Byte 1	None	Re-enable SRQ without reading or
	1010 0101		clearing the SEVE Register. xxxx
	Byte 2		xxxx is the address of the supply
	xxxx xxxx		in binary. Works only in MD Mode.

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83-507-5002 Rev. B