Texas Instruments 880 User Manual page 44

Table 4-1. Error Codes (concluded)
Status Code Explanation/Action
24
Parity
Error
29
Escape Sequence
Error
2A
Escape Sequence
Not Executed
Print Features
Switch Override
28
Form Length
Error
2C
Character Set
Not Installed
30-38
Interface Loopback
Errors
4-4
Occasional error may be caused by faulty grounds (see App. CI. If more errors than good
characters, problem may be incorrect baud rate
or
parity choice.
ACTION: Verify ground connection between host and printer. Verify chassis-to-signal ground
connection in printer (see App. CI. Verify proper baud rate and parity selection. (See configu-
ration codes
21 -
2A and
31 - 38.
I
Illegal sequence received or legal sequence with illegal argument.
ACTION: Verify correct sequence being sent (see Section 61. Select configuration code
ff7
to
verify correct sequence being received.
Host tried to change something that was selected by the Print Features switch.
ACTION: Put switch in Host position, or correct illegal action by host.
Illegal key was pressed while setting form length. Form length has not changed.
ACTION: Refer to Section 3 and try again.
Host selected character set that is not installed. Status report shows which
sets
are installed.
ACTION: Press Reset key. Select another character
set.
These errors are meaningful only when a special external test module is installed and an
interface test is run.
ACTION: If you ran the test by accident, ignore the errors and press RESET. Otherwise,
call Service.
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