Start/Restart Signal - Overview

General Information

The safety module eSM provides for automatic start/restart and manual start/restart.

WARNING
	UNINTENDED EQUIPMENT OPERATION Use Manual Start/Restart if unintended restart is a hazard according to your risk assessment. Failure to follow these instructions can result in death, serious injury, or equipment damage.

The safety module eSM disables the power stage and inhibits enabling of the power stage after the following events:

After the 24 V power supply is activated.
After an Emergency Stop.
After an error of classes 2, 3 or 4 has been detected.

When enabling of the power stage is inhibited by the safety module eSM, the drive remains in the operating state 3 (Switch On Disabled) of the state diagram.

The power stage can only be unlocked by a start/restart signal at the input ESMSTART. The following conditions must be fulfilled for the start/restart signal to be accepted:

No Emergency Stop request (signals ESTOP_A and ESTOP_B).
Error messages of the safety module eSM have been acknowledged.

In the case of manual start/restart, the power stage is unlocked via a start pulse. In the case of automatic start/restart, it is unlocked via the level at the input ESMSTART. The type of start is selected via the parameter eSM_BaseSetting.

The parameters of the safety module eSM can only be modified via the commissioning software.

Parameter name HMI menu HMI name	Description	Unit Minimum value Factory setting Maximum value	Data type R/W Persistent Expert	Parameter address via fieldbus
eSM_BaseSetting	eSM basic settings. None: No function Auto Start: Automatic start (ESMSTART) Ignore GUARD_ACK: GUARD_ACK inactive Ignore /INTERLOCK_IN: INTERLOCK chain inactive Type: Unsigned decimal - 2 bytes Write access via Sercos: CP2, CP3, CP4 Setting can only be modified if power stage is disabled.	- - - -	UINT16 R/W per. -	-

The start/restart signal ESMSTART unlocks the power stage.

The power stage cannot be enabled by means of an Enable signal unless it is unlocked.