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:

External synchronization: The Modbus client synchronizes the IFM or IFE communication interface, or the BSCM Modbus SL/ULP module in Modbus SL only mode and in Modbus SL and ULP mode.
Internal synchronization:
- If the BSCM Modbus SL/ULP module is in ULP only mode, the IFM or IFE communication interface synchronizes all ULP modules connected in the IMU, including the BSCM Modbus SL/ULP module.
- If the BSCM Modbus SL/ULP module is in Modbus SL only mode or in Modbus SL and ULP mode, the BSCM Modbus SL/ULP module synchronizes all ULP modules connected in the IMU.

External Synchronization

There are three ways to externally synchronize the IFM or IFE communication interface or the BSCM Modbus SL/ULP module in Modbus SL only mode or in Modbus SL and ULP mode:

Manually with EcoStruxure Power Commission software.
By programming of the Modbus client using:
- either the Modbus function set date and time: function code 43-16 Write Functions
- or the set absolute time command through the IFM or IFE communication interface, or through the BSCM Modbus SL/ULP module.
Automatically:
- With IFE communication interface configured as SNTP mode.

The communication interface is considered as externally synchronized if the last synchronization has occurred within the last 2 hours.

NOTE: It is recommended to update the date and time of serial devices such as the IFM communication interface or the BSCM Modbus SL/ULP module periodically, by using the IFE communication interface webpages.

Internal Synchronization

The date and time is received from:

The IFM communication interface
Or the IFE communication interface
Or the BSCM Modbus SL/ULP module, in Modbus SL only mode or Modbus SL and ULP mode

The date and time is broadcast to all the ULP modules connected in the IMU.