Hi to you all,

At first I'm not sure that I'm posting this in the right group .

On a 840D MMC103 machine we've a problem with our plc .
Sometimes when the machine is idle the plc goes in stop -> PS & PF on the NCU
With diagnostic buffer I can see that some profibus et200x module might have given a problem.
However, when get a look, I don't see anything wrong on the module's .

How must I read, interpreterthis information ?
Modul 41, 42 & 43 are connected with each other .
You don't see the error of module 41, but it has also has given the same error .

Event 1 of 100: Event ID 16# 4563
STOP caused by I/O access error (OB not loaded or not possible, or no FRB)
Breakpoint in user program: ###1###*TOBNAMEZ1<
Priority class: 1###8E###*TBSTREF0TASK<
Previous operating mode: ###8###*TBZ
Requested operating mode: ###4###*TBZ###FF###*TLFAE<
Internal error, Incoming event
07:02:54:894 am 06/24/14

Event 2 of 100: Event ID 16# 2942
I/O access error, reading
###20###*TBERREF Access address:<- What is this ?
128###0###*TBSTREF0TASK<###7A###*TLFOB<###FE###*TLFAE<
External error, Incoming event
07:02:54:894 am 06/24/14

Event 3 of 100: Event ID 16# 39C4
Distributed I/Os: station failure
Address of the affected DP slave: station number: 43
DP master system ID: 1
Log. base address of the DP slave: Input address: 1007
Log. base address of the DP master: 1023
###56###*TOB< <- what is this ?
###1A###*TAE< ""
External error, Incoming event
07:02:54:875 am 06/24/14

Event 4 of 100: Event ID 16# 38C4
Distributed I/Os: station return
Address of the affected DP slave: station number: 42
DP master system ID: 1
Log. base address of the DP slave: Input address: 1008
Log. base address of the DP master: 1023
###56###*TOB<
###1A###*TAE<
External error, Outgoing event
06:49:31:147 am 06/24/14


Thanks for helping !