Hello,

Using the S7 1214c fw 4.0 as I-Device , exchanging 32 + 32 byte I/O

1 - Reading/Writing directly on the In /Out the communication is OK

Controller ---- I-device

EB20 <------ AB20

AB20 ------> EB20

2 - Using DPRD_DAT / DPWR_DAT

Controller ----- I-Device

AB20 ----> DPRD_DAT ok

EB20 <---- DPWR_DAT or DPRD_DAT<--- DPRW_DAT error

I always error

"W#16#80A1 - Access error detected while the I/O devices were being accessed (DPWR_DAT)

( W#16#80A0 - Access error detected while the I/O devices were being accessed (DPRD_DAT)

I used S7315_2pn and S7 1215 fw 3.x / Tia Portal V13+upd 1

The problem is independent of the nr. byte I send or receive , only for DPWR_DAT

Thank you!

Hello,

please see the FAQ and perhaps it could be meanful for you:

http://support.automation.siemens.com/WW/view/en/21848242

With best regards
Cicero