Cpu 318-2 - Siemens SIMATIC S7-300 Series Reference Manual

CPU 318-2, Technical Data
CPU and Product Version
MLFB 6ES7 318-2AJ00-0AB0
S
Hardware version 03
S
Firmware version V 3.0
S
Matching programming STEP 7 V 5.1 +
Service Pack 02
package
Memory
Work memory
S
integral 256 KB data/
256 KB code
S
Expandable no
Load memory
S
integral 64 KB
S
Expandable FEPROM Up to 4 MB
S
Expandable RAM Up to 2 MB
Backup Yes
S
With battery All data
S
Without battery max. 11 KB
Processing times
Processing times for
S
0.1 ms minimum
Bit instructions
S
0.1 ms minimum
Word instructions
S
0.1 ms minimum
Double integer
arithmetic
S
0.6 ms minimum
Floating-point
arithmetic
Timers/Counters and their retentive characteristics
S7 counters 512
S
Adjustable retentivity from C 0 to C 511
S
Preset from C 0 to C 7
S
Counting range 0 to 999
IEC Counters Yes
S
Type SFB
S7 timers 512
S
Adjustable retentivity from T 0 to T 511
S
Preset No retentive times
S
Timing range 10 ms to 9990 s
IEC Timers Yes
S
SFB
Type
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
Data areas and their retentive characteristics
Retentive data area as a max. 11 KB
whole (inc. flags, timers,
counters)
Bit memories 8192
S
Adjustable retentivity MB 0 to MB 1023
S
Preset MB 0 to MB 15
Clock memories 8 (1 memory byte)
Data blocks 2047 (DB 0 reserved)KB
S
Size max. 64 KB
S
Adjustable retentivity max. 8 DB, max. 8192 data
bytes
S
Preset No retentivity
Local data (alterable) max. 8192 bytes
S
Preset 3584 bytes
S
Per priority class 256 bytes (expandable to
8192 bytes)
Blocks
OBs See Instruction List
S
Size max. 64 KB
Nesting depth
S
Per priority class 16
S
additional levels within 3
an error OB
FBs max. 1024
S
Size max. 64 KB
FCs max. 1024
S
Size max. 64 KB
Address areas (I/O)
Peripheral address area, max. 8 KB/8 KB (freely
digital/analog addressable)
S
Distributed
– MPI/DP Interface max. 2 KB/2 KB
– DP interface max. 8 KB/8 KB
Process image 2048/2048 bytes
(configurable)
S
Preset 256/256 bytes
Digital channels max. 65536 (minus 1 byte
diagnostic address per DP
slave)/65536
S
Centralized max. 1024/1024
Analog channels max. 4096/4096
S
Centralized max. 256/128
CPUs
1-71