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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
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