Basic Slave Information

Basic information about the ESM state of a salve is available in the IEC project under "Current State".

The slave can be in one of the following states:

ESM state 8

Operational

ESM state 4

Safe operational

ESM state 2

Pre-operational

ESM state 1

Init

Additional important notes provide further information:

Current State Obtained From Slave

Current State Obtained From Slave = true

The master could determine the current bus state.

Error Indication Obtained From Slave

Error Indication Obtained From Slave = true

The slave indicates an error via the AL status register.

Sync Unit Error

Sync Unit Error = true

The process data received by the slave are invalid. The slave is part of a sync unit. The process data of this sync unit was not received correctly.