| | SIMATIC S7-300, CPU 318-2 DP 512 KBYTE USER MEMORY (256 KB CODE; 256 KB DATA 1ST INTERF. = MPI 12 MBIT/S; 2ND INTERF. = PROFIBUS DP |
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| General information |
| Hardware product version | 03 |
| Firmware version | V3.0 |
| Engineering with |
| Programming package | STEP 7 V5.1 SP2 |
| 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) | Miniature circuit breaker; 2 A, type B or C |
| Input current |
| Current consumption (in no-load operation), typ. | 1.2 A |
| Inrush current, max. | 12 A |
| Inrush current, typ. | 8 A |
| I²t | 0.4 A²·s |
| from supply voltage L+, max. | i |
| Power losses |
| Power loss, typ. | 12 W |
| Memory |
| Work memory |
| integrated | 512 kbyte |
| Load memory |
| expandable FEPROM | Yes |
| expandable FEPROM, max. | 4 Mbyte |
| integrated RAM, max. | 64 kbyte |
| expandable RAM | Yes |
| expandable RAM, max. | 2 Mbyte |
| Backup |
| present | Yes |
| with battery | Yes; all blocks |
| without battery | Yes; 11 KB |
| CPU processing times |
| for bit operations, min. | 0.1 µs |
| for bit operations, max. | 0.1 µs |
| for word operations, min. | 0.1 µs |
| for fixed point arithmetic, min. | 0.1 µs |
| for floating point arithmetic, min. | 0.6 µs |
| for timer/counter operations, min. | 0.1 µs |
| CPU-blocks |
| DB |
| Number, max. | 2047; Number band: 1 to 2047 |
| Size, max. | 64 kbyte |
| FB |
| Number, max. | 1024; Number band: 0 to 1023 |
| Size, max. | 64 kbyte |
| FC |
| Number, max. | 1024; Number band: 0 to 1023 |
| Size, max. | 64 kbyte |
| OB |
| Description | see instruction list |
| Number, max. | see instruction list |
| Size, max. | 64 kbyte |
| Number of time alarm OBs | 2; OB 10, 11 |
| Number of delay alarm OBs | 2; OB 20, 21 |
| Number of time interrupt OBs | 2; OB 32, 35 |
| Number of process alarm OBs | 2; OB 40, 41 |
| Number of startup OBs | 1; OB 100 |
| Number of asynchronous error OBs | 5; OB 80, 81, 85, 86, 87 |
| Number of synchronous error OBs | 2; OB 121, 122 |
| Nesting depth |
| per priority class | 16 |
| additional within an error OB | 3 |
| Counters, timers and their retentivity |
| S7 counter |
| Number | 512 |
| of which retentive without battery |
| adjustable | Yes |
| preset | Z 0 to Z 7 |
| Counting range |
| lower limit | 0 |
| upper limit | 999 |
| IEC counter |
| present | Yes |
| Type | SFB |
| S7 times |
| Number | 512 |
| Retentivity |
| adjustable | Yes |
| preset | No times retentive |
| Time range |
| lower limit | 10 ms |
| upper limit | 9990 s |
| IEC timer |
| present | Yes |
| Type | SFB |
| Data areas and their retentivity |
| Flag |
| Number, max. | 1024 byte |
| Retentivity available | Yes; MB 0 to MB 1023 |
| Retentivity preset | MB 0 to MB 15 |
| Number of clock memories | 8; 1 memory byte |
| Data blocks |
| Number, max. | 2047; from DB 1 to DB 2047 |
| Size, max. | 64 kbyte |
| Local data |
| adjustable, max. | 8192 byte |
| preset | 3584 byte |
| per priority class, max. | 8192 byte |
| Address area |
| I/O address area |
| Inputs | 8 kbyte |
| Outputs | 8 kbyte |
| of which, distributed |
| Inputs | 8 kbyte |
| Outputs | 8 kbyte |
| Process image |
| Inputs | 2048 byte |
| Outputs | 2048 byte |
| Inputs, default | 256 byte |
| Outputs, default | 256 byte |
| Digital channels |
| Inputs | 65536 |
| Outputs | 65536 |
| Inputs, of which central | 1024 |
| Outputs, of which central | 1024 |
| Analog channels |
| Inputs | 4096 |
| Outputs | 4096 |
| Inputs, of which central | 256 |
| Outputs, of which central | 128 |
| Hardware configuration |
| Racks, max. | 4 |
| Modules per rack, max. | 8 |
| Expansion devices, max. | 3 |
Number of DP
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