Explanation to Firmware Version Numbering E20 Fieldbus

NORMAL VERSION
Version 1 to 16: out warning is not used
Version 17 to 40: out warning is used
  - Unit starts after power on with the last active program

SPECIAL VERSION A
Version 61 to 80: same as version 21 to 40, but without warning
  - Version for replacing a unit with software version 1 to 16.
  - Sometimes the warning signal is controlled by the PLC. At units with version 1 to 16 this had no function.
    If such a unit is replaced with version 17 to 40 it will cause the PLC to stop because of the warning.
    For this situation please use version 61 to 80.

SPECIAL VERSION B
Version 81 to 99: same as version 21 to 40, but without program number storing
  - At normal and special version A the program number is always stored when switching between programs.
    If the switching is very often (1 million), it destroys the memory.
  - After power up the unit starts with program 255.

SPECIAL VERSION AB
Version 50 to 59: combination of special versions A and B
  - After power up the unit starts with program 255.
  - This version does not store the program number.
  - Out warning signal is not used.

NEW VERSION INCLUDES THE FOUR VERSIONS
Beginning with Version Vx3579x3 the behaviour of the Software could be set at "system parameter 0"