First Virtual Communications 3000 Available EMU information, Power Sequencing Signals, SW5 SW6

		Environmental Monitoring Unit
Table 3-3 Power Sequencing Signals
SW5	SW6	Action
Off	Off	No delayed power sequencing
On	Off	Power sequencing if only 1 PSU is available
X	On	Delayed power sequencing
X = Don’t Care

SW7 enables SCSI Termination power for bus one and SW8 enables SCSI Termination power for bus two.

Available EMU information

More comprehensive information is provided to intelligent agents such as Eurologic’s Vision software. Configuration, warning and status Information is available from all EMU’s. The single EMU Storage System will provide the data shown in Table 3-4 and Table 3-5.

Table 3-4 Read Only Memory locations within the EMU

Data Name	Number of Information Bytes
EMU Part No.	4 bytes
EMU Firmware Rev	2 bytes
EMU Serial No.	4 bytes
EMU Power Cycle Count	2 bytes
Status Byte	2 bytes
EMU Available	2 bytes
EMU Attention	2 bytes
Local Temp	2 bytes
EMU Data	8 bytes
Fan Insertion Count	2 bytes per Fan
PSU Insertion Count	2 bytes per PSU
SCSI Device Insertion Count	2 bytes per SCSI Devices
Table 3-5 Read/Write locations within the EMU
Data Name	Number of Information Bytes
Master	12 bytes
Alarm Temperature	2 bytes
Critical Temperature	2 bytes
Action Byte	2 bytes
SCSI Device Status	2 bytes
Power Supply Control & Status	2 bytes
Fan Status	2 bytes

3-5