WCL488 Series Water Cooled Electronic Loads
Operation & Programming Manual
TDI-Dynaload Division
Page 46
402828, Rev. B1
Data Separators
It is not necessary to separate numerical data from the previous command by any character. White
space is ignored. The use of a space is recommended, however, as it aids in command string
legibility.
Program Line Terminators
The terminator instructs the Dynaload that the end of an incoming command line has been
reached and that command decoding can begin. In a like manner, the Dynaload terminates each of
its outgoing response strings with a terminator.
Normally the terminator for command strings is appended automatically by the IEEE-488 bus
controller in the system computer. The terminator must be established as both a carriage return
and a line feed, or as a carriage return only by following the IEEE-488 bus configuration
procedure.
Numerical Data Formats
The programmable Dynaload accepts the two numerical data formats listed below (see Table K).
These are described in more detail in IEEE Standard 488.2 —
Standard Digital Interface for
Programmable Instruments
.
Table K. Numerical Data Formats
Symbol
Data Form(s)
NR1
Digits with no decimal point. The decimal point is assumed to be to the right
of the least significant digit. For example: 314, 0314.
NR2
Digits with a decimal point. For example: 314.0, 31.41, 0.0314
Numerical Data Units
The numerical units in which the WCL488 receives and transmits quantities are fixed. They are
listed in Table L.
Incoming commands must not have any units transmitted with them, as this will cause an
“ unrecognized command” error.
Responses to queries in the TEXT ON (long format) mode are followed by the unit transmission
format indicated in the table. In the TEXT OFF (short format) only the numbers are transmitted.