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SIMATIC S7-300, CPU 314C-2DP COMPACT CPU WITH MPI, 24 DI/16 DO, 4AI, 2AO, 1 PT100, 4 FAST COUNTERS (60 KHZ), INTEGRATED DP INTERFACE, INTEGRATED 24V DC POWER SUPPLY, 48 KBYTE WORKING MEMORY, MICRO MEMORY CARD REQUIRED |
| Supply voltage |
| Rated value (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 |
1 000 mA |
| Inrush current, max. |
11 A |
| Power losses |
| Power loss, typ. |
14 W |
| Memory |
| Work memory |
| ● Integrated |
48 kbyte; For program and data |
| ● expandable |
No |
| Load memory |
| ● expandable FEPROM |
Yes; with Micro Memory Card (MMC) |
| ● expandable FEPROM, max. |
4 Mbyte |
| Backup |
| ● present |
Yes; Guaranteed by MMC (maintenance-free) |
| ● without battery |
Yes; Program and data |
| CPU processing times |
| for bit operations, typ. |
0.1 µs |
| for word operations, typ. |
0.5 µs |
| for fixed point arithmetic, typ. |
1 µs |
| for floating point arithmetic, typ. |
15 µs |
| CPU-blocks |
| DB |
| ● Number, max. |
127; DB 0 reserved |
| ● Size, max. |
16 kbyte |
| FB |
| ● Number, max. |
128 |
| ● Size, max. |
16 kbyte |
| FC |
| ● Number, max. |
128 |
| ● Size, max. |
16 kbyte |
| OB |
| ● Size, max. |
16 kbyte |
| ● Number of time alarm OBs |
1 |
| ● Number of delay alarm OBs |
1 |
| ● Number of time interrupt OBs |
1 |
| ● Number of process alarm OBs |
1 |
| Nesting depth |
| ● per priority class |
8 |
| ● additional within an error OB |
4 |
| Counters, timers and their retentivity |
| S7 counter |
| ● Number |
256 |
| of which retentive without battery |
| — can be set |
Yes; Z 0 to Z 255 |
| — lower limit |
0 |
| — upper limit |
256 |
| Counting range |
| — lower limit |
1 |
| — upper limit |
999 |
| IEC counter |
| ● present |
Yes |
| ● Type |
SFB |
| S7 times |
| ● Number |
256 |
| Retentivity |
| — can be set |
Yes; T 0 to T 255 |
| — lower limit |
0 |
| — upper limit |
256 |
| Time range |
| — lower limit |
10 ms |
| — upper limit |
9 990 s |
| IEC timer |
| ● present |
Yes |
| ● Type |
SFB |
| Data areas and their retentivity |
| Flag |
| ● Number, max. |
256 byte |
| ● Retentivity available |
Yes; MB 0 to MB 255 |
| Address area |
| I/O address area |
| ● Inputs |
1 kbyte |
| ● Outputs |
1 kbyte |
| Process image |
| ● Inputs |
128 byte |
| ● Outputs |
128 byte |
| Digital channels |
| ● Inputs |
992 |
| ● Outputs |
992 |
| Analog channels |
| ● Inputs |
248 |
| ● Outputs |
124 |
| Hardware configuration |
| Expansion devices, max. |
3 |
| Number of DP masters |
| ● Integrated |
1 |
| ● Via CP |
1 |
| Number of operable FMs and CPs (recommended) |
| ● FM |
8 |
| ● CP, point-to-point |
4 |
| ● CP, LAN |
2 |
| Rack |
| ● Racks, max. |
4 |
| ● Modules per rack, max. |
8; In rack 3 max. 7 |
| Time of day |
| Clock |
| ● Hardware clock (real-time clock) |
Yes |
| ● battery-backed and synchronizable |
Yes |
| Operating hours counter |
| ● Number |
1 |
| Clock synchronization |
| ● supported |
Yes |
| Digital inputs |
| Number of digital inputs |
24 |
| Input voltage |
| ● Rated value, DC |
24 V |
| ● for signal "0" |
-3 to +5V |
| ● for signal "1" |
15 to 30 V |
| Input current |
| ● for signal "1", typ. |
8 mA |
| Input delay (for rated value of input voltage) |
| for standard inputs |
| — Parameterizable |
Yes; 0.1 / 0.3 / 3 / 15 ms |
| for counter/technological functions |
| — at "0" to "1", max. |
8 µs |
| Cable length |
| ● Cable length, shielded, max. |
1 000 m; 100 m for technological functions |
| ● Cable length unshielded, max. |
600 m |
| Digital outputs |
| Number of digital outputs |
16 |
| short-circuit protection |
Yes; Clocked electronically |
| Limitation of inductive shutdown voltage to |
L+ (-48 V) |
| Output voltage |
| ● for signal "1", min. |
L+ (-0.8 V) |
| Output current |
| ● for signal "1" permissible range for 0 to 40 °C, max. |
500 mA |
| ● for signal "1" permissible range for 0 to 60 °C, max. |
500 mA |
| ● for signal "1" minimum load current |
5 mA |
| ● for signal "0" residual current, max. |
0.5 mA |
| Switching frequency |
| ● with resistive load, max. |
100 Hz |
| ● with inductive load, max. |
0.5 Hz |
| Aggregate current of outputs (per group) |
| all mounting positions |
| — up to 40 °C, max. |
8 A |
| — up to 60 °C, max. |
4 A |
| Cable length |
| ● Cable length, shielded, max. |
1 000 m |
| ● Cable length unshielded, max. |
600 m |
| Analog inputs |
| Number of analog inputs |
4 |
| Number of analog inputs for voltage/current measurement |
4 |
| Number of analog inputs for resistance/resistance thermometer measurement |
1 |
| Input ranges |
| ● Voltage |
Yes |
| ● Current |
Yes |
| ● Resistance thermometer |
Yes |
| ● Resistance |
Yes |
| Input ranges (rated values), voltages |
| ● 0 to +10 V |
Yes |
| Input ranges (rated values), currents |
| ● 0 to 20 mA |
Yes |
| ● -20 to +20 mA |
Yes |
| ● 4 to 20 mA |
Yes |
| Input ranges (rated values), resistance thermometer |
| ● Pt 100 |
Yes |
| Input ranges (rated values), resistors |
| ● 0 to 600 ohms |
Yes |
| Analog outputs |
| Number of analog outputs |
2 |
| Output ranges, voltage |
| ● 0 to 10 V |
Yes |
| ● -10 to +10 V |
Yes |
| Output ranges, current |
| ● 0 to 20 mA |
Yes |
| ● -20 to +20 mA |
Yes |
| ● 4 to 20 mA |
Yes |
| Analog value creation |
| Integration and conversion time/resolution per channel |
| ● Resolution with overrange (bit including sign), max. |
12 bit |
| ● Integration time, parameterizable |
Yes; 2,5 / 16,6 / 20 ms |
| ● Conversion time (per channel) |
1 ms |
| Encoder |
| Connectable encoders |
| ● 2-wire sensor |
Yes |
| — Permissible quiescent current (2-wire sensor), max. |
1.5 mA |
| Errors/accuracies |
| Basic error limit (operational limit at 25 °C) |
| ● Voltage, relative to input area, (+/-) |
0.7 % |
| ● Current, relative to input area, (+/-) |
0.7 % |
| ● Resistance thermometer, relative to input area, (+/-) |
3 % |
| ● Voltage, relative to output area, (+/-) |
0.7 % |
| ● Current, relative to output area, (+/-) |
0.7 % |
| Interfaces |
| MPI |
| ● Cable length, max. |
50 m; without repeater |
| 1st interface |
| Interface type |
Integrated RS 485 interface |
| Physics |
RS 485 |
| Isolated |
No |
| Power supply to interface (15 to 30 V DC), max. |
200 mA |
| Functionality |
| ● MPI |
Yes |
| ● DP master |
No |
| ● 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 |
| — Global data communication |
Yes |
| — S7 basic communication |
Yes |
| — S7 communication |
Yes |
| — S7 communication, as client |
No |
| — S7 communication, as server |
Yes |
| 2nd interface |
| Interface type |
Integrated RS 485 interface |
| Physics |
RS 485 |
| Isolated |
Yes |
| Power supply to interface (15 to 30 V DC), max. |
200 mA |
| Functionality |
| ● MPI |
No |
| ● DP master |
Yes |
| ● DP slave |
Yes |
| ● Point-to-point connection |
No |
| DP master |
| ● Number of connections, max. |
12; For PG/OP communication |
| ● Transmission rate, max. |
12 Mbit/s |
| ● Number of DP slaves, max. |
32 |
| Services |
| — PG/OP communication |
Yes |
| — Global data communication |
No |
| — S7 basic communication |
No |
| — S7 communication |
No |
| — S7 communication, as client |
No |
| — S7 communication, as server |
No |
| — Equidistance mode support |
Yes |
| — SYNC/FREEZE |
Yes |
| — Direct data exchange (slave-to-slave communication) |
Yes |
| — DPV1 |
No |
| Address area |
| — Inputs, max. |
1 kbyte |
| — Outputs, max. |
1 kbyte |
| User data per DP slave |
| — Inputs, max. |
244 byte |
| — Outputs, max. |
244 byte |
| Communication functions |
| PG/OP communication |
Yes |
| Global data communication |
| ● supported |
Yes |
| ● Number of GD packets, transmitter, max. |
4 |
| ● Number of GD packets, receiver, max. |
4 |
| ● Size of GD packets, max. |
22 byte |
| S7 basic communication |
| ● supported |
Yes |
| ● User data per job, max. |
76 byte |
| S7 communication |
| ● User data per job, max. |
64 kbyte |
| Number of connections |
| ● overall |
12 |
| ● usable for PG communication |
11 |
| — reserved for PG communication |
1 |
| — Adjustable for PG communication, max. |
11 |
| ● usable for OP communication |
11 |
| — reserved for OP communication |
1 |
| — adjustable for OP communication, max. |
11 |
| ● usable for S7 basic communication |
8 |
| — Reserved for S7 basic communication |
8 |
| — adjustable for S7 basic communication, max. |
8 |
| ● usable for routing |
4 |
| S7 message functions |
| Number of login stations for message functions, max. |
7 |
| Integrated Functions |
| Number of counters |
4 |
| Counter frequency (counter) max. |
60 kHz |
| Frequency measurement |
Yes |
| controlled positioning |
Yes |
| PID controller |
Yes |
| Number of pulse outputs |
4 |
| Limit frequency (pulse) |
2.5 kHz |
| Galvanic isolation |
| Galvanic isolation digital inputs |
| ● Galvanic isolation digital inputs |
Yes |
| ● between the channels, in groups of |
16 |
| ● between the channels and the backplane bus |
Yes |
| Galvanic isolation digital outputs |
| ● Galvanic isolation digital outputs |
Yes |
| ● between the channels, in groups of |
8 |
| ● between the channels and the backplane bus |
Yes |
| Galvanic isolation analog inputs |
| ● Galvanic isolation analog inputs |
Yes; common for analog I/O |
| Galvanic isolation analog outputs |
| ● Galvanic isolation analog outputs |
Yes; common for analog I/O |
| Configuration |
| Configuration software |
| ● STEP 7 |
Yes; V5.1 SP2 |
| programming |
| ● Nesting levels |
8 |
| 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 |
120 mm |
| Height |
125 mm |
| Depth |
130 mm |
| Weights |
| Weight, approx. |
680 g |
| last modified: |
25.09.2014 |
