Cpu 315 - Siemens SIMATIC S7-300 Series Reference Manual

CPUs
1.4.5

CPU 315

Technical Specifications of the CPU 315
CPU and Product Version
MLFB 6ES7 315-5AF03-0AB0
S
Hardware version 01
S
Firmware version V 1.1.0
S
Matching programming STEP 7 V 5.0;
package Service Pack 03
Memory
Work memory
S
integral 48 KB
S
Expandable no
Load memory
S
integral 80 KB RAM
S
Expandable FEPROM Up to 4 MB
S
Expandable RAM no
Backup Yes
S
With battery All data
S
Without battery 4736 bytes, configurable,
(data, flags, timers)
Processing times
Processing times for
S
0.3 ms minimum
Bit instructions
S
1 ms minimum
Word instructions
S
2 ms minimum
Double integer math
S
50 ms minimum
Floating-point math
instructions
Timers/Counters and their retentive characteristics
S7 counters 64
S
Adjustable retentivity from C 0 to C 63
S
Preset from C 0 to C 7
S
Counting range 0 to 999
IEC Counters Yes
S
Type SFB
S7 timers 128
S
Adjustable retentivity from T 0 to T 127
S
Preset No retentive times
S
Timing range 10 ms to 9990 s
IEC Timers Yes
S
SFB
Type
1-60
Data areas and their retentive characteristics
Retentive data area as a
whole (inc. flags, timers,
counters)
Bit memories
S
Adjustable retentivity
S
Preset
Clock memories
Data blocks
S
Size
S
Adjustable retentivity
S
Preset
Local data (non-alterable)
S
Per priority class
Blocks
OBs
S
Size
Nesting depth
S
Per priority class
S
additional levels within
an error OB
FBs
S
Size
FCs
S
Size
Address areas (I/O)
Peripheral address area
Digital/Analog
Process image (cannot be
customized)
Digital channels
Analog channels
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
4736 bytes
2048
MB 0 to MB 255
MB 0 to MB 15
8 (1 memory byte)
max. 255 (DB 0 reserved)
max. 16 KB
max. 8 DB, 4096 data bytes
in all
No retentivity
max. 1536 bytes
256 bytes
See Instruction List
max. 16 KB
8
4
max. 192
max. 16 KB
max. 192
max. 16 KB
1 KB/1 KB (freely
addressable)
128 bytes/128 bytes
max. 1024/1024
max. 256/128
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