MIL-P-80054D
unit and shall be easily accessible for maintenance and tape handling. The
control shall have a tape error detection capability to continuously check for
the following errors:
a.
Odd parity per EIA RS-244.
b.
Even parity per EIA RS-358.
c.
Misaligned sprocket holes.
d.
No sprocket holes.
Any of the above errors shall halt machine functions and illuminate an error
light or a message on the data display unit to indicate fault condition.
3.4.11.2.2 Manual data input. A manual data input (MDI) unit shall be fur-
nished to permit manual entry of alphabetical, numerical and special charac-
ters necessary for control of all programmable machine functions. The
manually input data shall be immediately displayed on the data display to per-
mit data verification. The MDI shall be capable of entering a block of data
into memory upon command.
a.
Sequence number readout.
Actual position of each axis. The readout shall at least display
b.
the accumulative command axis position of one axis at a time without
loss of reference dimensions as a result of the switching.
Control and system error message.
c.
Miscellaneous functions.
d.
3.4.11.5 Control system modes of operation. The operational modes of the
control unit shall include manual, automatic, single block, MDI, and manual
jog.
.
abso-
control
have
shall
3.4.11.6 Absolute/ incremental input. The
lute/incremental input capability,
his mode shall be selected by a prepara-
tory "G" code which may be switched during the tape program,
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