Texas Instruments 990 User Manual page 116

Applications Programming
Pascal:
WRIT4D«buffer>,<char cnt>,<did>,<sid>,<st code»
where:
<buffer>
<char cnt>
<did>
<sid>
<st code>
is the name of the calling program's data
b u f fer th at con ta ins th e da ta to be se n t. Th e
da ta buffe'r is an array in FORTRAN tasks and
either an array or a character string in Pascal
tasks.
contains the character count. This is the
number of characters (one byte per character)
in the data that the subroutine is to transfer
from the calling program's data buffer to a
communications output buffer.
contains the network ID of the destination
program or remote device. If a calling program
in a TX5 secondary provides a DID that is
incorrect, the data is transmitted and then is
deleted at the primary station and an error
message is written to the system log at the
primary station. Validation ofDIDs is not
performed in TX5 secondary stations, as all
data is sent to the primary station. If a
calling program in a primary station provides a
DID that is incorrect, an error code of 8 is
returned in the status code variable.
contains either a zero or the network ID of the
calling program. If this parameter contains a
zero, the subroutine supplies the calling
program's network 10 to the variable.
is the variable to which the subroutine returns
the status code. The applications program
should check the sta tus code that is re turned
and take appropriate action. The codes and
their meanings are as follows:
4-30 2270526-9701