| SIMATIC S7-300, CPU 315-2DP Central processing unit with MPI Integr. power supply 24 V DC Work memory 256 KB 2nd interface DP master/slave Micro Memory Card required |
| General information |
| HW functional status | 01 |
| Firmware version | V3.3 |
| Engineering with |
| Programming package | STEP 7 V5.5 + SP1 or higher or STEP 7 V5.2 + SP1 or higher with HSP 218 |
| Supply voltage |
| Rated value (DC) | |
| 24 V DC | Yes |
| permissible range, lower limit (DC) | 19.2 V |
| permissible range, upper limit (DC) | 28.8 V |
| external protection for power supply lines (recommendation) | 2 A min. |
| Mains buffering |
| Mains/voltage failure stored energy time | 5 ms |
| Repeat rate, min. | 1 s |
| Input current |
| Current consumption (rated value) | 850 mA |
| Current consumption (in no-load operation), typ. | 150 mA |
| Inrush current, typ. | 3.5 A |
| I²t | 1 A²·s |
| Power loss |
| Power loss, typ. | 4.5 W |
| Memory |
| Work memory |
| integrated | 256 kbyte |
| expandable | No |
| Size of retentive memory for retentive data blocks | 128 kbyte |
| 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 |
| CPU processing times |
| for bit operations, typ. | 0.05 µs |
| for word operations, typ. | 0.09 µs |
| for fixed point arithmetic, typ. | 0.12 µs |
| for floating point arithmetic, typ. | 0.45 µs |
| CPU-blocks |
| Number of blocks (total) | 1 024; (DBs, FCs, FBs); the maximum number of loadable blocks can be reduced by the MMC used. |
| DB |
| Number, max. | 1 024; Number range: 1 to 16000 |
| Size, max. | 64 kbyte |
| FB |
| Number, max. | 1 024; Number range: 0 to 7999 |
| Size, max. | 64 kbyte |
| FC |
| Number, max. | 1 024; Number range: 0 to 7999 |
| Size, max. | 64 kbyte |
| OB |
| Description | see instruction list |
| Size, max. | 64 kbyte |
| Number of free cycle OBs | 1; OB 1 |
| Number of time alarm OBs | 1; OB 10 |
| Number of delay alarm OBs | 2; OB 20, 21 |
| Number of cyclic interrupt OBs | 4; OB 32, 33, 34, 35 |
| Number of process alarm OBs | 1; OB 40 |
| Number of DPV1 alarm OBs | 3; OB 55, 56, 57 |
| Number of isochronous mode OBs | 1; OB 61 |
| Number of startup OBs | 1; OB 100 |
| Number of asynchronous error OBs | 5; OB 80, 82, 85, 86, 87 |
| Number of synchronous error OBs | 2; OB 121, 122 |
| Nesting depth |
| per priority class | 16 |
| additional within an error OB | 4 |
| Counters, timers and their retentivity |
| S7 counter |
| Number | 256 |
| Retentivity |
| — adjustable | Yes |
| — lower limit | 0 |
| — upper limit | 255 |
| — preset | Z 0 to Z 7 |
| Counting range |
| — 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 |
| — lower limit | 0 |
| — upper limit | 255 |
| — 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, 128 KB max. |
| Flag |
| Number, max. | 2 048 byte |
| Retentivity available | Yes; MB 0 to MB 2 047 |
| Retentivity preset | MB 0 to MB 15 |
| Number of clock memories | 8; 1 memory byte |
| Data blocks |
| Retentivity adjustable | Yes; via non-retain property on DB |
| Retentivity preset | Yes |
| Local data |
| per priority class, max. | 32 kbyte; Max. 2 KB per block |
| Address area |
| I/O address area |
| Inputs | 2 048 byte |
| Outputs | 2 048 byte |
| of which distributed |
| — Inputs | 2 048 byte |
| — Outputs | 2 048 byte |
| Process image |
| Inputs | 2 048 byte |
| Outputs | 2 048 byte |
| Inputs, adjustable | 2 048 byte |
| Outputs, adjustable | 2 048 byte |
| Inputs, default | 128 byte |
| Outputs, default | 128 byte |
| Subprocess images |
| Number of subprocess images, max. | 1 |
| Digital channels |
| Inputs | 16 384 |
| — of which central | 1 024 |
| Outputs | 16 384 |
| — of which central | 1 024 |
| Analog channels |
| Inputs | 1 024 |
| — of which central | 256 |
| Outputs | 1 024 |
| — of which central | 256 |
| Hardware configuration |
| Number of expansion units, max. | 3 |
| Number of DP masters |
| integrated | 1 |
| 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; Typ.: 2 s |
| Behavior of the clock following POWER-ON | Clock continues running after POWER OFF |
| Behavior of the clock following expiry of backup period | Clock continues to run with the time at which the power failure occurred |
| 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 |
| to DP, master | Yes; With DP slave only slave clock |
| to DP, slave | Yes |
| in AS, master | Yes |
| in AS, slave | No |
| Digital inputs |
| Number of digital inputs | 0 |
| Digital outputs |
| Number of digital outputs | 0 |
| Analog inputs |
| Number of analog inputs | 0 |
| Analog outputs |
| Number of analog outputs | 0 |
| Interfaces |
| Number of industrial Ethernet interfaces | 0 |
| Number of PROFINET interfaces | 0 |
| Number of RS 485 interfaces | 2; MPI and PROFIBUS DP |
| Number of RS 422 interfaces | 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 |
| Transmission rate, max. | 187.5 kbit/s |
| Services |
| — PG/OP communication | Yes |
| — Routing | Yes |
| — Global data communication | Yes |
| — S7 basic communication | Yes |
| — S7 communication | Yes; Only server, configured on one side |
| — S7 communication, as client | No |
| — S7 communication, as server | Yes |
| 2. Interface |
| Interface type | Integrated RS 485 interface |
| Physics | RS 485 |
| Isolated | Yes |
| Power supply to interface (15 to 30 V DC), max. | 200 mA |
| Protocols |
| MPI | No |
| PROFIBUS DP master | Yes |
| PROFIBUS DP slave | Yes |
| Point-to-point connection | No |
| PROFIBUS DP master |
| Transmission rate, max. | 12 Mbit/s |
| Number of DP slaves, max. | 124; Per station |
| Services |
| — PG/OP communication | Yes |
| — Routing | Yes |
| — Global data communication | No |
| — S7 basic communication | Yes; I blocks only |
| — S7 communication | Yes; Only server, configured on one side |
| — S7 communication, as client | No |
| — S7 communication, as server | Yes |
| — Equidistance | Yes |
| — Isochronous mode | Yes; OB 61 |
| — SYNC/FREEZE | Yes |
| — Activation/deactivation of DP slaves | Yes |
| — Number of DP slaves that can be simultaneously activated/deactivated, max. | 8 |
| — DPV1 | Yes |
| Address area |
| — Inputs, max. | 2 048 byte |
| — Outputs, max. | 2 048 byte |
| User data per DP slave |
| — Inputs, max. | 244 byte |
| — Outputs, max. | 244 byte |
| PROFIBUS DP slave |
| GSD file | The latest GSD file is available at: http://www.siemens.com/profibus-gsd |
| Transmission rate, max. | 12 Mbit/s |
| automatic baud rate search | Yes; only with passive interface |
| Address area, max. | 32 |
| User data per address area, max. | 32 byte |
| Services |
| — PG/OP communication | Yes |
| — Routing | Yes; Only with active interface |
| — Global data communication | No |
| — S7 basic communication | No |
| — S7 communication | Yes; Only server, configured on one side |
| — S7 communication, as client | No |
| — S7 communication, as server | Yes |
| — Direct data exchange (slave-to-slave communication) | Yes |
| — DPV1 | No |
| Transfer memory |
| — Inputs | 244 byte |
| — Outputs | 244 byte |
| Isochronous mode |
| Isochronous operation (application synchronized up to terminal) | Yes |
| Communication functions |
| PG/OP communication | Yes |
| Data record routing | Yes |
| Global data communication |
| supported | Yes |
| Number of GD loops, max. | 8 |
| Number of GD packets, max. | 8 |
| Number of GD packets, transmitter, max. | 8 |
| Number of GD packets, receiver, max. | 8 |
| 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. | 240 byte; as server |
| S5 compatible communication |
| supported | Yes; via CP and loadable FC |
| Number of connections |
| overall | 16 |
| usable for PG communication | 15 |
| — reserved for PG communication | 1 |
| — adjustable for PG communication, min. | 1 |
| — adjustable for PG communication, max. | 15 |
| usable for OP communication | 15 |
| — reserved for OP communication | 1 |
| — adjustable for OP communication, min. | 1 |
| — adjustable for OP communication, max. | 15 |
| usable for S7 basic communication | 12 |
| — reserved for S7 basic communication | 0 |
| — adjustable for S7 basic communication, min. | 0 |
| — adjustable for S7 basic communication, max. | 12 |
| S7 message functions |
| Number of login stations for message functions, max. | 16; Depending on the configured connections for PG/OP and S7 basic communication |
| Process diagnostic messages | Yes |
| simultaneously active Alarm-S blocks, max. | 300 |
| Test commissioning functions |
| Status block | Yes; Up to 2 simultaneously |
| Single step | Yes |
| Number of breakpoints | 4 |
| 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. | 500 |
| — adjustable | No |
| — of which powerfail-proof | 100; Only the last 100 entries are retained |
| Number of entries readable in RUN, max. | |
| — adjustable | Yes; From 10 to 499 |
| — preset | 10 |
| Service data |
| can be read out | Yes |
| Ambient conditions |
| Ambient temperature during operation |
| min. | 0 °C |
| max. | 60 °C |
| 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 |
| Block encryption | Yes; With S7 block Privacy |
| Dimensions |
| Width | 40 mm |
| Height | 125 mm |
| Depth | 130 mm |
| Weights |
| Weight, approx. | 290 g |
| last modified: | 03/13/2019 |
