| SIMATIC S7-300, CPU 314 CPU WITH MPI INTERFACE INTEGRATED 24 V DC POWER SUPPLY 64 KBYTE WORKING MEMORY MICRO MEMORY CARD NECESSARY |
| General information |
| HW functional status | 01 |
| Firmware version | V2.0.0 |
| Engineering with |
| Programming package | STEP 7 V5.2 + SP1 or higher with HW update |
| Supply voltage |
| Rated value (DC) | |
| 24 V DC | Yes |
| permissible range, lower limit (DC) | 20.4 V |
| permissible range, upper limit (DC) | 28.8 V |
| external protection for power supply lines (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 loss |
| Power loss, typ. | 2.5 W |
| Memory |
| Work memory |
| integrated | 64 kbyte |
| expandable | No |
| Load memory |
| Plug-in (MMC) | Yes |
| Plug-in (MMC), max. | 8 Mbyte |
| Data management on MMC (after last programming), min. | 10 y |
| Backup |
| present | Yes; Guaranteed by MMC (maintenance-free) |
| without battery | Yes; Program and data |
| Battery |
| Backup battery |
| Backup time, max. | 10 y; At 40 °C ambient temperature |
| CPU processing times |
| for bit operations, typ. | 0.1 µs |
| for bit operations, max. | 0.2 µs |
| for word operations, typ. | 0.2 µs |
| for fixed point arithmetic, typ. | 2 µs |
| for floating point arithmetic, typ. | 3 µs |
| CPU-blocks |
| Number of blocks (total) | 1 024; (DBs, FCs, FBs OBs, SDBs); the maximum number of loadable blocks can be reduced by the MMC being used. |
| DB |
| Number, max. | 511; Number range: 1 to 511 |
| Size, max. | 16 kbyte |
| FB |
| Number, max. | 512; Number range: 0 to 2047 |
| Size, max. | 16 kbyte |
| FC |
| Number, max. | 512; Number range: 0 to 2047 |
| Size, max. | 16 kbyte |
| OB |
| Number, max. | see instruction list |
| 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 cyclic 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 | 1; OB 80 |
| 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 | 256 |
| Retentivity |
| — adjustable | Yes |
| — preset | Z 0 to Z 7 |
| 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 | 256 |
| Retentivity |
| — adjustable | Yes |
| — preset | No retentivity |
| Time range |
| — lower limit | 10 ms |
| — upper limit | 9 990 s |
| IEC timer |
| present | Yes |
| Type | SFB |
| Number | Unlimited (limited only by RAM capacity) |
| Data areas and their retentivity |
| retentive data area in total | All (incl. memory bits, times, counters) |
| Flag |
| Number, max. | 256 byte |
| Retentivity available | Yes; MB 0 to MB 255 |
| Retentivity preset | MB 0 to MB 15 |
| Number of clock memories | 8; 1 memory byte |
| Data blocks |
| Retentivity adjustable | No |
| Retentivity preset | Yes |
| Local data |
| per priority class, max. | 510 byte |
| Address area |
| I/O address area |
| Inputs | 1 kbyte |
| Outputs | 1 kbyte |
| Process image |
| Inputs | 128 byte |
| Outputs | 128 byte |
| Digital channels |
| Inputs | 1 024 |
| — of which central | 1 024 |
| Outputs | 1 024 |
| — of which central | 1 024 |
| Analog channels |
| Inputs | 256 |
| — of which central | 256 |
| Outputs | 256 |
| — of which central | 256 |
| Hardware configuration |
| Number of DP masters |
| integrated | 0 |
| via CP | 4 |
| Number of operable FMs and CPs (recommended) |
| FM | 8 |
| CP, PtP | 8 |
| CP, LAN | 10 |
| Rack |
| Racks, max. | 4 |
| Modules per rack, max. | 8 |
| Time of day |
| Clock |
| Hardware clock (real-time) | Yes |
| retentive and synchronizable | Yes |
| Backup time | 6 wk; At 40 °C ambient temperature |
| Deviation per day, max. | 10 s |
| Operating hours counter |
| Number | 1 |
| Number/Number range | 0 |
| Range of values | 0 to 2^31 hours (when using SFC 101) |
| Granularity | 1 h |
| retentive | Yes; Must be restarted at each restart |
| Clock synchronization |
| supported | Yes |
| to MPI, master | Yes |
| to MPI, slave | Yes |
| in AS, master | Yes |
| Analog inputs |
| integrated channels (AI) | 0 |
| Analog outputs |
| integrated channels (AO) | 0 |
| 1. Interface |
| Interface type | Integrated RS 485 interface |
| Physics | RS 485 |
| Isolated | No |
| Power supply to interface (15 to 30 V DC), max. | 200 mA |
| Protocols |
| MPI | Yes |
| PROFIBUS DP master | No |
| PROFIBUS DP slave | No |
| Point-to-point connection | No |
| MPI |
| Number of connections | 12 |
| Transmission rate, max. | 187.5 kbit/s |
| Services |
| — PG/OP communication | Yes |
| — Routing | No |
| — Global data communication | Yes |
| — S7 basic communication | Yes |
| — S7 communication | Yes |
| — S7 communication, as client | No |
| — S7 communication, as server | Yes |
| Communication functions |
| PG/OP communication | Yes |
| Global data communication |
| supported | Yes |
| Number of GD loops, max. | 4 |
| Number of GD packets, max. | 4 |
| Number of GD packets, transmitter, max. | 4 |
| Number of GD packets, receiver, max. | 4 |
| Size of GD packets, max. | 22 byte |
| Size of GD packet (of which consistent), max. | 22 byte |
| S7 basic communication |
| supported | Yes |
| User data per job, max. | 76 byte |
| User data per job (of which consistent), max. | 76 byte; 76 bytes (with X_SEND or X_RCV); 64 bytes (with X_PUT or X_GET as server) |
| S7 communication |
| supported | Yes |
| as server | Yes |
| as client | Yes; Via CP and loadable FB |
| User data per job, max. | 180 byte; With PUT/GET |
| User data per job (of which consistent), max. | 64 byte |
| S5 compatible communication |
| supported | Yes; via CP and loadable FC |
| Number of connections |
| overall | 12 |
| usable for PG communication | 11 |
| — reserved for PG communication | 1 |
| — adjustable for PG communication, min. | 1 |
| — adjustable for PG communication, max. | 11 |
| usable for OP communication | 11 |
| — reserved for OP communication | 1 |
| — adjustable for OP communication, min. | 1 |
| — adjustable for OP communication, max. | 11 |
| usable for S7 basic communication | 8 |
| — reserved for S7 basic communication | 8 |
| — adjustable for S7 basic communication, min. | 0 |
| — adjustable for S7 basic communication, max. | 8 |
| S7 message functions |
| Number of login stations for message functions, max. | 12; Depending on the configured connections for PG/OP and S7 basic communication |
| Process diagnostic messages | Yes |
| simultaneously active Alarm-S blocks, max. | 40 |
| Test commissioning functions |
| Status block | Yes |
| Single step | Yes |
| Number of breakpoints | 2 |
| Status/control |
| Status/control variable | Yes |
| Variables | Inputs, outputs, memory bits, DB, times, counters |
| Number of variables, max. | 30 |
| — of which status variables, max. | 30 |
| — of which control variables, max. | 14 |
| Forcing |
| Forcing | Yes |
| Forcing, variables | Inputs, outputs |
| Number of variables, max. | 10 |
| Diagnostic buffer |
| present | Yes |
| Number of entries, max. | 100 |
| — adjustable | No |
| Configuration |
| Configuration software |
| STEP 7 | Yes; V5.2 SP1 or higher with HW update |
| Programming |
| Command set | see instruction list |
| Nesting levels | 8 |
| System functions (SFC) | see instruction list |
| System function blocks (SFB) | see instruction list |
| Programming language |
| — LAD | Yes |
| — FBD | Yes |
| — STL | Yes |
| — SCL | Yes |
| — CFC | Yes |
| — GRAPH | Yes |
| — HiGraph® | Yes |
| Know-how protection |
| User program protection/password protection | Yes |
| Dimensions |
| Width | 40 mm |
| Height | 125 mm |
| Depth | 130 mm |
| Weights |
| Weight, approx. | 280 g |
| last modified: | 03/13/2019 |
