CPUs
1-63
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1.4.6 CPU 315-2 DP
DP master or DP slave
You can operate the CPU 315-2 DP on your 2nd interface (PROFIBUS-DP
interface) as DP Master or DP Slave in a PROFIBUS-DP network.
For details on PROFIBUS-DP characteristics of CPU 315-2 DP refer to Chapter 2.
CPU 315-2 DP, Technical Data
CPU and Product Version
MLFB
Hardware version
6ES7 315-2AF03-0AB0
01
Firmware version V 1.1.0
Matching programming
package
STEP 7 V 5.0;
Service Pack 03
Memory
Work memory
integral 64 KB
Expandable no
Load memory
integral 96 KB RAM
Expandable FEPROM Up to 4 MB
Expandable RAM no
Backup Yes
With battery All data
Without battery 4736 bytes
Processing times
Processing times for
Bit instructions 0.3 s minimum
Word instructions 1 s minimum
Double integer math 2 s minimum
Floating-point math
instructions
50 s minimum
Timers/Counters and their retentive characteristics
S7 counters 64
Adjustable retentivity from C 0 to C 63
Preset from C 0 to C 7
Counting range 0 to 999
IEC Counters Yes
Type SFB
S7 timers 128
Adjustable retentivity from T 0 to T 127
Preset No retentive times
Timing range 10 ms to 9990 s
IEC Timers Yes
Type
SFB
Data areas and their retentive characteristics
Retentive data area as a
whole (inc. flags, timers,
counters)
4736 bytes
Bit memories 2048
Adjustable retentivity MB 0 to MB 255
Preset MB 0 to MB 15
Clock memories 8 (1 memory byte)
Data blocks max. 255 (DB 0 reserved)
Size max. 16 KB
Adjustable retentivity 8 DB; max. 4096 data bytes
Preset No retentivity
Local data (non-alterable) max. 1536 bytes
Per priority class 256 bytes
Blocks
OBs See Instruction List
Size max. 16 KB
Nesting depth
Per priority class 8
additional levels within
an error OB
4
FBs max. 192
Size max. 16 KB
FCs max. 192
Size max. 16 KB
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