When i switch from manual to automatic mode from the faceplate i get this error.

LiErr with code = 10

AUT and MAN inputs are set to 0 and not interconnected. Am i supposed to connect them somewhere?

Hello Ashadako,

LI_ERR signifies a parameter assignment error which maybe due to an invalid combination at inputs. LI_ERR_STATE is a DWORD value which can be calculated based on a number of factors (mainly related to exceptions with respect to control strategy, setpoint (for SFC types) OR handling of automatic commands (simulataneous, multiple commands etc.) and/OR execution options used. 

The following are the conditions for the occurence of the error and their respective LI_ERR_STATE calculation:

● Control strategy (SFC type only) The control strategy is checked when QPARAM = 1: Bit 0 - if control strategy high limit is violated (CS > CS_HL) Bit 0 - if control strategy low limit is violated (CS < CS_LL) Bit 0 - if control strategies exist (CS_LL > 0) and the prepared control strategy (CS) is not enabled (SELCS)

● Setpoint (SFC type only) The setpoint is checked when QPARAM = 1: Bit 1 - if setpoint high limit is violated (>_HL) Bit 1 - if setpoint low limit is violated (<_LL) Bit 1 - if setpoint high limit < low limit (_HL <_LL)

● Automatic commands: Bit 2 - more than one command at the same time (e.g., START and HOLD, etc.) Bit 3 - simultaneous changeover to MANUAL and AUTO (MAN = 1 and AUT = 1)

● Execution options: Bit 4 - SCT = 0 and SCT_TAC = 0 Bit 4 - SCT = 1 and SCT_TAC = 1

Hope this helps :)

More information with respect to the Troubleshooting of SFC inputs/outputs can be found in Section 13.3.8 of the SFC for SIMATIC S7 Manual.