Rf-Series Controls And Indicators - DEC VAX 4000 300 Manual

Table 3–1: RF-Series Controls and Indicators
Control Position
Bus Node ID Plug Installed
Not Installed
Fault Lit
Not lit
Run/Ready In (lit, green)
Out (not lit)
Write-Protect In (lit, amber)
Out (not lit)
The Write-Protect button controls whether the system can write data to
the ISE. The system can read from the ISE regardless of the setting of the
Write-Protect button. When the Write-Protect button is out (not lit), the
system can write to the ISE. Your system disk (the ISE containing system
software) and ISEs containing work areas for users should be write-enabled,
the normal operating setting.
If you want to write-protect an ISE containing sensitive data that you do
not want changed or accidentally erased, set the Write-Protect button to in
(lit).
3–4 VAX 4000 Model 300 Operation
Function
The bus node ID plug identifies the bus node
ID number of the ISE to the system and is,
by default, the unit number. The ISE bus
node ID is factory set to a number 0 through
6.
The ISE bus node number is undefined. The
ISE fault indicator lights.
Indicates an error condition in the ISE.
The light is on temporarily during power-
up sequence (normal condition).
Indicates an error-free condition in the ISE.
ISE is on-line. When the ISE is available
for use, the green indicator light in the
switch is on. Under normal operation the
green indicator flashes as seek operations
are performed.
ISE is off-line and cannot be accessed. The
green indicator light cannot be lit when the
Run/Ready button is out.
ISE is write-protected.
software from writing to the ISE.
ISE is not write-protected. Normal position
for software operation. System software is
free to read from or write to the ISE.
Prevents system