Siemens CPU 314 Reference Manual

CPUs
1-71
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
CPU 318-2, Technical Data
CPU and Product Version
MLFB
 Hardware version
6ES7 318-2AJ00-0AB0
03
 Firmware version V 3.0
 Matching programming
package
STEP 7 V 5.1 +
Service Pack 02
Memory
Work memory
 integral 256 KB data/
256 KB code
 Expandable no
Load memory
 integral 64 KB
 Expandable FEPROM Up to 4 MB
 Expandable RAM Up to 2 MB
Backup Yes
 With battery All data
 Without battery max. 11 KB
Processing times
Processing times for
 Bit instructions 0.1 s minimum
 Word instructions 0.1 s minimum
 Double integer
arithmetic
0.1 s minimum
 Floating-point
arithmetic
0.6 s minimum
Timers/Counters and their retentive characteristics
S7 counters 512
 Adjustable retentivity from C 0 to C 511
 Preset from C 0 to C 7
 Counting range 0 to 999
IEC Counters Yes
 Type SFB
S7 timers 512
 Adjustable retentivity from T 0 to T 511
 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)
max. 11 KB
Bit memories 8192
 Adjustable retentivity MB 0 to MB 1023
 Preset MB 0 to MB 15
Clock memories 8 (1 memory byte)
Data blocks 2047 (DB 0 reserved)KB
 Size max. 64 KB
 Adjustable retentivity max. 8 DB, max. 8192 data
bytes
 Preset No retentivity
Local data (alterable) max. 8192 bytes
 Preset 3584 bytes
 Per priority class 256 bytes (expandable to
8192 bytes)
Blocks
OBs See Instruction List
 Size max. 64 KB
Nesting depth
 Per priority class 16
 additional levels within
an error OB
3
FBs max. 1024
 Size max. 64 KB
FCs max. 1024
 Size max. 64 KB
Address areas (I/O)
Peripheral address area,
digital/analog
max. 8 KB/8 KB (freely
addressable)
 Distributed
– MPI/DP Interface max. 2 KB/2 KB
– DP interface max. 8 KB/8 KB
Process image
(configurable)
2048/2048 bytes
 Preset 256/256 bytes
Digital channels max. 65536 (minus 1 byte
diagnostic address per DP
slave)/65536
 Centralized max. 1024/1024
Analog channels max. 4096/4096
 Centralized max. 256/128

Siemens CPU 314 Specifications

General

Brand	Siemens
Model	CPU 314
Category	Controller
Language	English