Date Management
Introduction
Each module of the IMU uses its date to time-stamp events and history registers.
The date of the IMU modules is updated in two steps:
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External synchronization: The Modbus master synchronizes the IFM interface.
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Internal synchronization: The IFM interface synchronizes all ULP modules connected in the IMU.
External Synchronization
The IFM interface is externally synchronized with the Modbus master using either of the two methods:
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the Modbus set date and time request, function code 43 (0x2B) and subfunction code 16 (0x10). The Modbus request is broadcasted to several communication interfaces or to one specific communication interface.
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the set absolute time command to the IFM interface using the command interface.
Internal Synchronization
When the IFM interface receives the date and time, it broadcasts the date and time to all the ULP modules connected in the IMU.