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CONVERT
IMAGE
IOBUFFER
TRANSFER
Enter
Enter is the complement of OUTPUT, and is used to transfer data
from the addressed instrument to the controller. The syntax is:
ENTER is always used in conjunction with OUTPUT, such as:
100
OUTPUT 719;
”
. . . programming codes . . .
‘I
110
ENTER 719;
‘I
. . . response data.. .
‘I
ENTER statements are commonly formatted, which requires the
secondary command USING and the appropriate image items. The
most-used image items involve end-of-line (EOI) suppression, binary
inputs, and literal inputs. For example:
100
ENTER719USING
"#,B";
A, B, C
suppresses the EOI sequence
(#),
and indicates that variables A, B,
and C are to be filled with binary (B) data. As another example,
100
ENTER719
USING
"#,
123A"; A$
suppresses EOI, and indicates that string variable A$ is to be filled
with 123 bytes of literal data (123A).
Note
Be careful when using byte-counting image specifiers. If the
requested number of bytes does not match the actual number
available, data might be lost, or the program might enter an endless
wait state.
The suppression of the EOI sequence is frequently necessary to
prevent a premature termination of the data input. When not
specified, the typical EOI termination occurs when an ASCII LF
Getting Started Programming 1-61