Siemens CPU 315-2 DP Reference Manual

Tips and Tricks
5-3
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 312 IFM and 314 IFM: Erasing the integrated EPROM
If you wish to erase the contents of the integrated EPROM, proceed as follows:
1. Open a window with an Online view of the opened project via menu command
View

Online, or
open the Online nodes window per click on the Online nodes in the function
bar, or select the menu item PLC

Show online nodes.
2. Select the MPI number of the target CPU (double-click).
3. Select the Function Block container.
4. Select the menu item Edit

Mark all.
5. Then select the menu item File

Delete, or press the DEL key. This deletes all
the selected blocks from the target memory.
6. Select the MPI number of the target CPU.
7. Select the menu item PLC

Copy RAM to ROM.
This command deletes all blocks online and overwrites the EPROM with the blank
contents of the RAM.
SFB “DRUM” - Reversed Bytes in Output Parameter OUT-WORD
With the SFB “DRUM”, the following CPUs return the value with reversed bytes on
the output parameter OUT_WORD.
CPU 312 IFM up to 6ES7312-5ACx2-0AB0, firmware V 1.0.0
CPU 313 up to 6ES7313-1AD03-0AB0, firmware V 1.0.0
CPU 314 up to 6ES7314-1AEx4-0AB0, firmware V 1.0.0
CPU 314 IFM up to 6ES7314-5AEx3-0AB0; firmware V 1.0.0
CPU 315 up to 6ES7315-1AF03-0AB0, firmware V 1.0.0
CPU 315-2 DP up to 6ES7315-2AFx2-0AB0,
CPU 316 up to 6ES7316-1AG00-0AB0
The result is the following assignment, with reference to output parameter OUTj,
0j15:
OUTj, 0j15:
76 0
j = 7 .... 0
54321
OUT_WORD
15 14 813 12 1110 9
j = 15 .... 8

Siemens CPU 315-2 DP Specifications

General

Memory	64 KB
Power Supply	24 V DC
Order Number	6ES7 315-2AG10-0AB0
Number of DP Masters	1
Number of DP Slaves	124
Load Memory	64 KB
Number of Timers	256
Number of Counters	256
Data Memory	64 KB
Operating Temperature	0 to 60 °C
Integrated Interfaces	MPI, DP
Digital Outputs	Not integrated
Analog Inputs	Not integrated
Analog Outputs	Not integrated
Programming Languages	LAD, FBD, STL
Digital Inputs	Not integrated
Weight	660 g