GEK-113032A W650 Wind Generator Protection System B-11
APPENDIX B B.4 MODBUS APPENDIX
B
B.4.2 WRITING SETTINGS
The writing process of settings GROUP is formed by two phases: writing of any zone and confirmation. The target is to
guarantee the protections functionality and offer versatility for possible legacy programs.
The process of changing protection functionality will almost always involve the change of several settings at the same time,
requiring a “time point” for new settings operation. The combination of numbers, enums, etc, which cooperate in fulfill a
determined function is called GROUP
The memory map of a setting GROUP includes: the stored settings at the beginning of its settings zone and a temporary
hole for new settings and confirmation.
When settings are changed, we must write in the selected settings zone, in any order or quantity of written zone, and finally,
to give a reference point we must write a register in the last position of the group, (this is called CONFIRMATION by some
protocols).
For safety reasons, there is certain limitation when CONFIRMING settings GROUPS; the time period from the last settings
writing to CONFIRMATION, cannot exceed 15 seconds.
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