CPU 31xC and CPU 31x, Technical Data 
Manual, 01/2006 Edition, A5E00105475-06 
iii 
Preface 
Purpose of the Manual 
This manual contains all the information you will need concerning the configuration, 
communication, memory concept, cycle, response times and technical data for the CPUs. 
You will then learn the points to consider when upgrading to one of the CPUs discussed in 
this manual. 
Required basic knowledge 
•  To understand this manual, you require a general knowledge of automation engineering. 
•  You should also be accustomed to working with STEP 7 basic software. 
Area of application  
Table 1  Application area covered by this manual 
as of version 
CPU  Convention:  
CPU designations: 
Order number 
Firmware  Hardware 
CPU 312C  6ES7312-5BD01-0AB0  V2.0.0  01 
CPU 313C  6ES7313-5BE01-0AB0  V2.0.0  01 
CPU 313C-2 PtP  6ES7313-6BE01-0AB0  V2.0.0  01 
CPU 313C-2 DP  6ES7313-6CE01-0AB0  V2.0.0  01 
CPU 314C-2 PtP  6ES7314-6BF02-0AB0  V2.0.0  01 
CPU 314C-2 DP 
CPU 31xC 
6ES7314-6CF02-0AB0  V2.0.0  01 
CPU 312  6ES7312-1AD10-0AB0  V2.0.0  01 
CPU 314  6ES7314-1AF11-0AB0  V2.0.0  01 
CPU 315-2 DP  6ES7315-2AG10-0AB0  V2.0.0  01 
CPU 315-2 PN/DP  6ES7315-2EG10-0AB0  V2.3.0  01 
CPU 317-2 DP  6ES7317-2AJ10-0AB0  V2.1.0  01 
CPU 317-2 PN/DP  6ES7317-2EJ10-0AB0  V2.3.0  01 
CPU 319-3 PN/DP 
CPU 31x 
6ES7318-3EL00-0AB0  V2.4.0  01