| | SIMATIC S7-300, CPU 314 IFM COMPACT CPU WITH MPI, FOR EXPANDED TEMPERATURE RANGE, 16DI/16DO, 4AI/1AO, 2 X 40 PIN, INTEGRATED 24V DC POWER SUPPLY, 32 KBYTE WORKING MEMORY |
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| Supply voltage |
| Rated voltage/DC | 24 V |
| permissible range, lower limit (DC) | 20.4 V |
| permissible range, upper limit (DC) | 28.8 V |
| Load voltage L+ |
| Rated value (DC) | 24 V |
| permissible range, lower limit (DC) | 20.4 V |
| permissible range, upper limit (DC) | 28.8 V |
| Input current |
| Rated value at 24 V DC | 1000 mA |
| Inrush current, max. | 8 A |
| Power losses |
| Power loss, typ. | 16 W |
| Memory |
| Work memory |
| integrated | 32 kbyte; 32 KB/10 K instructions RAM (integrated); 1 instruction means 3 bytes on average |
| Load memory |
| integrated RAM, max. | 48 kbyte |
| Backup |
| with battery | Yes; all blocks |
| without battery | Yes; 144 bytes: Bit memories, counters, timers and data |
| CPU processing times |
| for bit operations, min. | 0.3 µs |
| for bit operations, max. | 0.6 µs |
| for word operations, min. | 1 µs |
| for fixed point arithmetic, min. | 2 µs |
| for floating point arithmetic, min. | 50 µs |
| for timer/counter operations, min. | 12 µs |
| CPU-blocks |
| DB |
| Number, max. | 127 |
| Size, max. | 8 kbyte |
| FB |
| Number, max. | 128 |
| Size, max. | 8 kbyte |
| FC |
| Number, max. | 128 |
| Size, max. | 8 kbyte |
| OB |
| Description | see instruction list |
| Size, max. | 8 kbyte |
| Number of free cycle OBs | 1; OB 1 |
| Number of time alarm OBs | 1; OB 10 |
| Number of time interrupt OBs | 1; OB 35 |
| Number of process alarm OBs | 1; OB 40 |
| Number of startup OBs | 1; OB 100 |
| Nesting depth |
| per priority class | 8 |
| Counters, timers and their retentivity |
| S7 counter |
| Number | 64 |
| of which retentive with battery |
| adjustable | Yes |
| lower limit | 0 |
| upper limit | 63 |
| of which retentive without battery |
| adjustable | Yes |
| lower limit | 0 |
| upper limit | 63 |
| Counting range |
| lower limit | 1 |
| upper limit | 999 |
| S7 times |
| Number | 128 |
| of which retentive with battery |
| adjustable | Yes |
| lower limit | 0 |
| upper limit | 71 |
| of which retentive without battery |
| adjustable | Yes |
| lower limit | 0 |
| upper limit | 71 |
| Time range |
| lower limit | 10 ms |
| upper limit | 9990 s |
| Data areas and their retentivity |
| Flag |
| Number, max. | 256 byte |
| Retentivity available | Yes; MB 0 to MB 255 |
| of which retentive with battery | 0 to 2047 (M 0.0 to M 255.7, adjustable) |
| of which retentive without battery | 0 to 1152 (M 0.0 toM 143.7, adjustable) |
| Address area |
| I/O address area |
| Inputs | 512 byte |
| Outputs | 512 byte |
| Process image |
| Inputs | 128 byte |
| Outputs | 128 byte |
| Digital channels |
| Inputs | 992 |
| Outputs | 992 |
| Analog channels |
| Inputs | 248 |
| Outputs | 124 |
| Addressing volume |
| Outputs | 122 byte |
| Inputs | 122 byte |
| Address space per module |
| Address space per module, max. | 512 byte |
| Hardware configuration |
| Modules per rack, max. | 31 |
| Expansion devices, max. | 3 |
| Connectable programming devices/PCs | PGs/PCs with STEP 7 connectable via MPI interface |
| Number of modules per DP slave interface, max. | 16 |
| Number of DP masters |
| via CP | 1; CP 342-5 |
| Number of operable FMs and CPs (recommended) |
| FM | 4 |
| CP, point-to-point | 2 |
| CP, LAN | 1 |
| Time of day |
| Clock |
| Hardware clock (real-time clock) | Yes |
| Digital inputs |
| Number/binary inputs | 20; of which 4 channels can be used for process alarms or integrated functions |
| Input voltage |
| Rated value, DC | 24 V |
| for signal "0" | -3 to +5 V |
| for signal "1" | 15 to 30 V |
| Input current |
| for signal "1", typ. | 7 mA; Min. 2 mA |
| Input delay (for rated value of input voltage) |
| for standard inputs |
| at "0" to "1", max. | 5 ms; typically 3 ms
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