Siemens Simatic S7-300 CP 341 User Manual page 103

Notes about conversion statements
Please note the following in relation to conversion statements:
● Whenever a maximum length is specified for the default display, the actual output can
also be shorter. Example: The output of the integer 10 consists of only 2 characters.
● The length of the data to be printed depends on the length of the variables. For example,
in the case of the I display type a maximum of 6 places can be output for the INT data
type and a maximum of 11 places for the DINT data type.
● A width of "0" is not permissible in conversion statements. This is printed out as "******"
with the valid conversion statement.
● If the specified width is too small, in the case of text-based output (display types A, C, D,
S, T, Y, and Z), only the number of characters corresponding to the specified width are
output (the remainder are truncated). In all other cases, "*" characters are output
corresponding to the width.
● Undefined or invalid conversion statements are not executed. This is printed out as
"******" (e.g. display type missing: %2.2).
The rest of the conversion statement (i.e., everything after the character identified as
incorrect) is output. This allows the exact cause of the error to be determined.
● Conversion statements without associated variables will be ignored. Variables for which
there is no conversion statement are not output.
● Conversion statements in a header or footer that are not supported are not executed.
Instead, they are forwarded to the printer transparently.
● You must use control statements to specify formatting (line feed, tabs, etc.) in a message
text or in the printout of a longer conversion statement.
● If both the format string and the message text contain conversion statements, the format
string is expanded first, followed by the message text.
Example: Voltage 3 V – Current 2 A
Message text 1 = Voltage %I V
Format string = '%N – Current: %I A'
Variable 1 = 1
Variable 2 = 2
Variable 3 = 3
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01
www.gkbpx.com
Basic Principles of Serial Data Transmission
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2.8 Configuration data
103