4-7
IM DLM4038-17EN
Programming Overview
1
2
3
4
5
6
App
Index
• If a character string contains a double quotation
mark (
"
), the double quotation mark is expressed as
two consecutive quotation marks (
""
). This rule also
applies to single quotation marks.
• A response message is always enclosed in double
quotation marks (
"
).
• <String data> is any character string. Therefore,
the DLM4000 assumes that the remaining program
message units are part of the character string
if no single (
'
) or double quotation mark (
"
) is
encountered. As a result, no error is detected if a
quotation mark is omitted.
• For information about the number of characters in a
file name, see the DLM4000 Features Guide.
<Block Data>
<Block data> is any 8-bit data. It is only used in
response messages on the DLM4000. The syntax is as
follows:
Form Example
#N<N-digit decimal number><data byte sequence>
#800000010ABCDEFGHIJ
• #N
Indicates that the data is <block data>. “N” indicates
the number of succeeding data bytes (digits) in
ASCII code.
• <N-digit decimal number>
Indicates the number of bytes of data (example:
00000010
=
10
bytes).
• <Data byte sequence>
Expresses the actual data (example: ABCDEFGHIJ).
• Data is comprised of 8-bit values (0 to 255). This
means that the ASCII code “0AH,” which stands for
“NL,” can also be included in the data. Hence, care
must be taken when programming the controller.
<Register>
<Register> is an integer that can be expressed in
decimal, hexadecimal, octal, or binary notation. It is used
when each bit of the value has a particular meaning. The
following types of expressions are possible.
Form
Example
<NRf>
1
#H<Hexadecimal value made up of the digits
#H0F
0 to 9 and A to F>
#Q<Octal value made up of the digits 0 to 7>
#Q777
#B<Binary value made up of the digits 0 and 1>
#B001100
• <Register> is not case sensitive.
• Response messages are always expressed in the
<NR1> form.
<Character Data>
<Character data> is a predefined character string
(mnemonics). It is mainly used to indicate that an
option listed as a character string in braces must be
selected and entered. The data interpretation rules are
the same as those described in “Header Interpretation
Rules” on page 4-4.
Form Example
{AC|DC|DC50|GND} AC
• As with the header, the
COMMunicate:VERBose
command can be used to select whether to return
the response in the full form or in the abbreviated
form.
• The
COMMunicate:HEADer
setting does not affect
<character data>.
<Boolean>
<Boolean> is data that indicates ON or OFF. The
following types of expressions are possible.
Form Example
{ON|OFF|<NRf>}
ON OFF 1 0
• When <Boolean> is expressed in the <NRf> form,
“OFF” is selected if the rounded integer value is 0,
and ON is selected for all other cases.
• A response message is always returned with a 1 if
the value is ON and with a 0 if the value is OFF.
<String Data>
<String data> is not a predefined character string like
<character data>. It can be any character string. The
character string must be enclosed in single quotation
marks (
'
) or double quotation marks (
"
).
Form Example
<String data>
'ABC' "IEEE488.2-1987"
4.4 Data
