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Unit options that may be specified are:
Option
Action
OFFLINE
Set the printer offline; default when detached
ONLINE
Set the printer online; default when attached
POWEROFF
Turn the printer power off
POWERON
Turn the printer power on; default
The
OFFLINE
and
ONLINE
options place the printer offline and online, respectively. The former provides a
convenient method of setting the printer "down" without detaching the associated output file.
Entering the
SET LPS POWEROFF
command simulates removing power from the line printer. A
SET LPS
POWERON
command restores power to the printer.
When a debug log has been established, tracing may be configured by specifying one or more of the reporting level
options:
Option
Reporting Level
CMDS
Command initiations and completions
CPU
Words received from and sent to the CPU
XFER
Data receptions and transmissions
STATE
Printer state transitions
IOBUS
I/O bus signals and data words received and returned
The
CMDS
option traces the commands executed by the printer. The
CPU
option traces words received from
(control and write data) and sent to (status and read data) the CPU. The
XFER
option traces the characters sent to
the printer. The
STATE
option traces printer state changes. The
IOBUS
option traces the I/O backplane signals
and data received and returned via the interface.
Examples of the trace formats follow:
>>LPS cmds: Character 'M' scheduled for line 6, column 20, time = 13825
>>LPS cmds: Character CR scheduled for line 6, column 81, time = 0
>>LPS cpu: Control 000015 (CR) output
>>LPS cpu: Status 100001 returned
>>LPS xfer: Character 'D' printed
>>LPS xfer: Character ETX erased
>>LPS state: Power state is OFF
>>LPS state: Power state is TURNING ON, scheduled time = 39500
>>LPS iobus: Received data 000000 with signals CLC | CLF
>>LPS iobus: Returned data 000000