Appendix
A.1 Information about upgrading to a CPU 31xC or CPU 31x
CPU 31xC and CPU 31x, Technical data
A-2 Manual, Edition 08/2004, A5E00105475-05
... then please note if you upgrade to one of the following CPUs
From version CPU Order number
Firmware Hardware
Hereafter called
312 6ES7312-1AD10-0AB0 V2.0.0 01
312C 6ES7312-5BD01-0AB0 V2.0.0 01
313C 6ES7313-5BE01-0AB0 V2.0.0 01
313C-2 PtP 6ES7313-6BE01-0AB0 V2.0.0 01
313C-2 DP 6ES7313-6CE01-0AB0 V2.0.0 01
314 6ES7314-1AF10-0AB0 V2.0.0 01
314C-2 PtP 6ES7314-6BF01-0AB0 V2.0.0 01
314C-2 DP 6ES7314-6CF01-0AB0 V2.0.0 01
315-2 DP 6ES7315-2AG10-0AB0 V2.0.0 01
315-2 PN/DP 6ES7315-2EG10-0AB0 V2.3.0 01
317-2 DP 6ES7317-2AJ10-0AB0 V2.1.0 01
317-2 PN/DP 6ES7317-2EJ10-0AB0 V2.3.0 01
CPU 31xC/31x
Reference
If you intend to migrate from PROFIBUS DP to PROFINET, we also recommend the
following manual:
Guide: From PROFIBUS DP to PROFINET IO
See also
DPV1 (Page 3-32)
A.1.2 Changed behavior of certain SFCs
SFC 56, SFC 57 and SFC 13 which work asynchronously
Some of the SFCs that work asynchronously, when used on CPUs 312IFM – 318-2 DP, were
always, or under certain conditions, processed after the first call ("quasi-synchronous").
On the 31xC/31x CPUs these SFCs actually run asynchronously. Asynchronous processing
may cover multiple OB1 cycles. As a result, a wait loop may turn into an endless loop within
an OB.
The following SFCs are affected:
• SFC 56 "WR_DPARM"; SFC 57 "PARM_MOD"
On CPUs 312 IFM to 318-2 DP, these SFCs always work "quasi-synchronously" during
communication with centralized I/O modules and always work synchronously during
communication with distributed I/O modules.
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