WAGO-I/O-SYSTEM 750
Function Description 109
750-880, 750-880/025-000 ETHERNET Programmable Fieldbus Controller
Manual
Version 1.0.1
7.4.6
SPS Access to the File System of the Memory Card
The fieldbus nodes and the SPS program are in operation and the memory card is
plugged in.
The SPS program accesses the file system on the memory card.
Here, the SPS program writes data (e.g. retain data) onto the memory card and
reads data from the memory card or copies data from/to the file system of the
memory card.
In normal operation, data is read into the file system of the memory card or read
from it for further processing by the IEC61131 application via a firmware library.
Meanwhile, the SD-LED blinks yellow/orange.
The data is then written or read.
Table 41: Possible errors during SPS access to the file system of the memory card
Possible error
Procedure
Error message
Solution
Memory card is full
Read functions are
executed, in case of
write access, the
function is cancelled.
The data is incomplete
or not updated.
Error is reported via
the CoDeSys library.
Replace the memory
card with a new one,
then restart the access
function.
Make space on the
memory card with the
PC.
Memory card is write-
protected.
Read functions are
executed, write access
is not possible. The
memory card remains
as it was.
Error is reported via
the CoDeSys library.
Remove the memory
card, remove the write
protection, insert the
card again, then restart
the access function.
No memory card is
plugged in.
Access function is
cancelled.
Error is reported via
the CoDeSys library.
If memory card usage
is desired, insert the
memory card, then
restart the access
function.
Manual interrupt
Access function is
cancelled.
Error is reported via
the CoDeSys library.
Restart the access
function.
