First Virtual Communications Voyager 3000 - Manual (Page 38)

Voyager 3000 User Guide
3-4
Switch Signal Name Description Default Setting
SW1 ID2 Address Bit 2 Setting is
SW2 ID1 Address Bit 1 position
SW3 ID0 Address Bit 0 dependent
SW4 Sync Spindle Sync Off
SW5 DLYSEN Drive Spinup Enable On
SW6 DLYSON Drive Spinup Delay Off
SW7 Term Pwr 1 Termination Power
Enable Bus One On
SW8 Term Pwr 1 Termination Power
Enable Bus Two On
SW1àSW3 are used to set the I
2
C bus ID. A device with address 0 is designated as the
master. Any other ID caused the EMU to appear as a slave device. Table 3-2 lists the ID
setting for the EMU.
Table 3-2 ID settings for the EMU
SW1 SW2 SW3 EMU ID
Off Off Off 0 (Master)
Off Off On 1
Off On Off 2
Off On On 3
On Off Off 4
On Off On 5
On On Off 6
On On On 7
SW4 is used to enable drive spindle synchronization.
SW5 and SW6 are used to control drive spinup sequencing.
If SW6 is set off then SW5 will control drive sequencing. If SW5 is off then power up
sequencing is disabled. If SW5 is set to on then power up sequencing will be enabled if only
one PSU is available
10
otherwise no power sequencing will occur.
If SW6 is on then delayed power sequencing will always occur regardless of the setting of
SW5. Table 3-3 summarizes these signals
10 This situation may occur if a PSU has failed or the system has been set up with only one PSU configured.
Table 3-1 EMU Switch Settings