| SIMATIC S7-300, CPU 312 CPU WITH MPI INTERFACE, INTEGRATED 24 V DC POWER SUPPLY 32 KBYTE WORKING MEMORY, MICRO MEMORY CARD NECESSARY |
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General information |
Hardware product version | 01 |
Firmware version | V2.6 |
Engineering with |
Programming package | STEP 7 V5.2 + SP1 or higher with HW update |
Supply voltage |
24 V DC | Yes |
permissible range, lower limit (DC) | 20.4 V |
permissible range, upper limit (DC) | 28.8 V |
External protection for supply cables (recommendation) | 2 A min. |
Input current |
Current consumption (rated value) | 0.6 A |
Current consumption (in no-load operation), typ. | 60 mA |
Inrush current, typ. | 2.5 A |
I²t | 0.5 A²·s |
Power losses |
Power loss, typ. | 2.5 W |
Memory |
Work memory |
integrated | 32 kbyte; For program and data |
expandable | No |
Load memory |
pluggable (MMC) | Yes |
pluggable (MMC), max. | 4 Mbyte |
Data management on MMC (after last programming), min. | 10 a |
Backup |
present | Yes; Guaranteed by MMC (maintenance-free) |
without battery | Yes; Program and data |
CPU processing times |
for bit operations, min. | 0.2 µs |
for word operations, min. | 0.4 µs |
for fixed point arithmetic, min. | 5 µs |
for floating point arithmetic, min. | 6 µs |
CPU-blocks |
Number of blocks (total) | 1024; (DBs, FCs, FBs); the maximum number of loadable blocks can be reduced by the MMC used. |
DB |
Number, max. | 511; Number range: 1 to 511 |
Size, max. | 16 kbyte |
FB |
Number, max. | 1024; Number range: 0 to 2047 |
Size, max. | 16 kbyte |
FC |
Number, max. | 1024; Number range: 0 to 2047 |
Size, max. | 16 kbyte |
OB |
Size, max. | 16 kbyte |
Number of free cycle OBs | 1; OB 1 |
Number of time alarm OBs | 1; OB 10 |
Number of delay alarm OBs | 1; OB 20 |
Number of time interrupt OBs | 1; OB 35 |
Number of process alarm OBs | 1; OB 40 |
Number of startup OBs | 1; OB 100 |
Number of asynchronous error OBs | 4; OB 80, 82, 85, 87 |
Number of synchronous error OBs | 2; OB 121, 122 |
Nesting depth |
per priority class | 8 |
additional within an error OB | 4 |
Counters, timers and their retentivity |
S7 counter |
Number | 128 |
Retentivity |
adjustable | Yes |
lower limit | 0 |
upper limit | 127 |
preset | 8 |
Counting range |
adjustable | Yes |
lower limit | 0 |
upper limit | 999 |
IEC counter |
present | Yes |
Type | SFB |
Number | Unlimited (limited only by RAM capacity) |
S7 times |
Number | 128 |
Retentivity |
adjustable | Yes |
lower limit | 0 |
upper limit | 127 |
preset | No retentivity |
Time range |
lower limit | 10 ms |
upper limit | 9990 s |
IEC timer |
present | Yes |
Type | SFB |
Number | Unlimited (limited only by RAM capacity) |
Data areas and their retentivity |
retentive data area, total | All (incl. memory bits, times, counters) |
Flag |
Number, max. | 128 byte |
Retentivity available | Yes; MB 0 to MB 127 |
Retentivity preset | MB 0 to MB 15 |
Number of clock memories | 8; 1 memory byte |
Data blocks |
Number, max. | 511; Number range: 1 to 511 |
Size, max. | 16 kbyte |
Retentivity adjustable | Yes; via non-retain property on DB |
Retentivity preset | Yes |
Local data |
per priority class, max. | 256 byte |
Address area |
I/O address area |
Inputs | 1 kbyte |
Outputs | 1 kbyte |
Process image |
Inputs | 128 byte |
Outputs | 128 byte |
Digital channels |
Inputs | 256 |
Outputs | 256 |
Inputs, of which central | 256 |
Outputs, of which central | 256 |
Analog channels |
Inputs | 64 |
Outputs | 64 |
Inputs, of which central | 64 |
Outputs, of which central | 64 |
Hardware configuration |
Racks,
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