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If the MVME162LX tries to access offboard resources in a nonexistent
location and is not system controller, and if the system does not have a
global bus timeout, the MVME162LX waits forever for the VMEbus cycle
to complete. This will cause the system to lock up. There is only one
situation in which the system might lack this global bus timeout: when the
MVME162LX is not the system controller and there is no global bus
timeout elsewhere in the system.
Multiple controllers may be installed in a single VME chassis. In general,
hardware multiprocessor features are supported.
Note
Other MPUs on the VMEbus can interrupt, disable, communicate with,
and determine the operational status of the processor(s). One register of the
GCSR (global control/status register) set includes four bits that function as
location monitors to allow one controller processor to broadcast a signal to
any other controller processors. All eight registers are accessible from any
local processor as well as from the VMEbus.
The controller provides +5 Vdc power to the remote LED/switch
connector (J2) as well as to IP_b through a 2A fuse (F3) located near J7.
Connector J2 is the interface for a remote control and indicator panel. If
none of the LEDs light and the ABORT and RESET switches do not
operate, check fuse F3.
The controller provides +12 Vdc power to the Ethernet transceiver
interface through a 1A fuse (F1) located near J3. The
indicate that +12 Vdc is available. If the Ethernet transceiver fails to
operate, check fuse F1.
The controller provides +5 Vdc to the SCSI bus
fuse F4, located near J7. One function of the
the front panel is to monitor the SCSI bus
controller connected to a SCSI bus, the
SCSI terminator power. Because any device on the SCSI bus can provide
TERMPWR
the LED flickers during SCSI bus operation, check the fuse. This display
also indicates the status of the +5 Vdc (F2, F3), +12 Vdc (F5), and -12 Vdc
(F6) fuses for the IP modules.
http://www.mcg.mot.com/literature
If you are installing multiple controllers in an MVME945
chassis, do not install the controller in slot 12. The height of
the IP modules may cause clearance difficulties in that slot
position.
, the LED does not directly indicate the condition of the fuse. If
Installation Instructions
LED lights to
FUSES
signal through
TERMPWR
LED (part of DS2) on
FUSES
signal; with the
TERMPWR
LED lights when there is
FUSES
2
2-15
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