ILX Lightwave LDC-3908, Руководство пользователя

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O P E R A T I N G I N R E M O T E C O N T R O L
LDC-3908 Laser Diode Controller Command Set
03_02 LDC-3908
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C H A P T E R
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GPIB Versus RS-232 Communication
The LDC-3908 should not be run remotely via GPIB and RS-232 at the same time. When using the
RS-232 interface, the remote GPIB command set is fully operable. Command syntax does not vary
between GPIB and RS-232 usage. However, the commands which affect GPIB hardware operation
will not be useful. For example, the user could send the *SRE command via RS-232. However, any
service request (SRQ) via GPIB would not be visible since RS-232 has no hardware to support it.
This is because SRQ is a function of the GPIB interface hardware and is not available via RS-232.
LDC-3908 Laser Diode Controller Command Set
This section contains information about the LDC-3908's mainframe command set, command
syntax, and error and status registers. For the most efficient and effective remote control of your
controller, we recommend you study the following sections. For module-specific commands, refer
to the GPIB section of the instruction manual for that module.
Command Syntax
Any command or command query must contain all of the letters which are shown in the LDC-3908
Command Path Structure, Figure 3.1. However, the Controller's command parser is NOT CASE
SENSITIVE, so any combination of upper or lower case letters may be used. (The lower case letters
shown with the Device Dependent commands in Chapter 4 are optional letters and may be used for
clarity.) For example, the following commands are equivalent:
CHAN 1
Chann 1
channel 1
In this example, only the first four letters, “CHAN”, are required, while the other letters, “nel”, are
optional. However, these optional letters must be used in the proper sequence, as shown above.
The syntax of the LDC-3908's commands follows the rules laid out in the IEEE-488.2 standard.
Colons (:) indicate the start of a new command or mnemonic separator within a command, while
semicolons (;) indicate a separation of commands within a command string.
Spaces or white space may be used to separate commands and/or data (after the command
header or query question mark). Spaces or white space must be used to separate the command
(header) from the first parameter (or program data). The following examples show valid syntax for
commands with the LDC-3908 Laser Diode Controller:
The following are examples of invalid syntax for the LDC-3908 Laser Diode Controller. These
command strings would produce an erroneous result, as explained:
:DELAY 50
MES “test 4”
rad dec
*RCL 7
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