Image processing
4.1 Reading code (1D and 2D codes)
SIMATIC MV420 / SIMATIC MV440
38 Operating Instructions, 04/2013, A5E02371045-06
4.1.2.6 Performance characteristics when reading one-dimensional codes
The recognition processes of the reader allow reliable and fast reading of printed one-
dimensional codes of good quality.
● If the code type has a checksum, the checksum is also transferred in the read result
(text).
● Do not work with variable string lengths with "Interleaved 2/5" or "Code 39".
To avoid incomplete codes being read, set the number of bars to "Saved" on the
"Advanced" tab of under speedup options.
● The "Full ASCII" coding of the code type "Code 39" is not supported.
– To read this code type with the reader, use code type "Code 39".
– To obtain the original text with the additional "Full ASCII" characters, you need to post-
edit the textual read result.
Reliable reading of Pharmacode
● As the Pharmacode structure is simple, set the following speedup parameters to "Saved"
on the "Advanced" tab under "Options":
– Height
– Length
– Module width
– Number of bars
– Minimum quiet zone length
– Sample spacing
● Save the program before reading. For the program to be successfully saved, the
Pharmacode to be saved must have both narrow and wide elements. This avoids reading
errors due to the absence of error correction of this code type.
● Since a Pharmacode on its head cannot be detected automatically, select the code type
"Pharmacode (0°)" or "Pharmacode (180°)".
● Standard code generators allow a maximum of 63 bars for a Pharmacode. The integrated
Pharmacode decoder is therefore also limited to maximum of 63 bars per code.
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