Leuze electronic MA 204i Technical Description page 65

Notice!
Because the data module contains 2 bytes for the control and status bytes, the actual user
data length is always 2 bytes smaller than the selected data module.
E.g., when using the data module with 12 bytes, there are effectively 10 bytes available for
user data on the Leuze device after subtracting the 2 bytes for status and control bytes.
Recommendation
In most cases, the 4-byte module is sufficient for the output module.
A larger module is needed, for example, if a BCL bar code scanner is to be configured by
means of PT-sequences, or an RFID transponder is to be described. In these cases, larger
data modules are usually sensible.
Examples of sensible settings for corresponding Leuze devices
BPS 8
• Input module: 8 bytes
• Output module: 4 bytes
AMS
• Input module: 8 bytes
• Output module: 8 bytes
Hand-held scanner
• Input module: individual
The size of the input module is dependent on the number of digits of the bar code or
2D code that is to be read. For example, with an 12-digit bar code (+ 2 bytes of status
bytes), the input module with 16 bytes is sensible.
• Output module: none
Because the hand-held scanner does not typically send any data, no output module
is necessary.
BCL bar code scanners, RFID devices (RFM, RFI and RFU), LSIS 122 and LSIS 4x2i
• Input module: individual
The size of the input module is dependent on the number of digits of the bar code,
RFID code or 2D code that is to be read. For example, with an 18-digit bar code
(+ 2 bytes of status bytes), the input module with 20 bytes is sensible.
• Output module: 4 bytes
Leuze electronic
Commissioning and configuration
MA 204i 63