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SIMATIC S7-300, CPU 312C COMPACT CPU WITH MPI, 10 DI/6 DO, 2 FAST COUNTERS (10 KHZ), INTEGRATED 24V DC POWER SUPPLY, 16 KBYTE WORKING MEMORY, FRONT CONNECTOR (1 X 40PIN) AND MICRO MEMORY CARD REQUIRED |
| General information |
| Hardware product version |
01 |
| Firmware version |
V2.0 |
| Engineering with |
| ● Programming package |
STEP 7 V5.2 SP1 or higher |
| Supply voltage |
| 24 V DC |
Yes |
| 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 |
| Current consumption (in no-load operation), typ. |
60 mA |
| Inrush current, typ. |
3 A |
| from supply voltage L , max. |
500 mA |
| Power losses |
| Power loss, typ. |
6 W |
| Memory |
| Work memory |
| ● Integrated |
16 kbyte; For program and data |
| ● expandable |
No |
| Load memory |
| ● pluggable (MMC) |
Yes |
| ● pluggable (MMC), max. |
4 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. |
0.2 µs |
| for bit operations, max. |
0.4 µs |
| for word operations, typ. |
0.4 µs |
| for fixed point arithmetic, typ. |
5 µs |
| for floating point arithmetic, typ. |
6 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 time 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 |
128 |
| of which retentive without battery |
| — can be set |
Yes |
| — lower limit |
0 |
| — upper limit |
128 |
| Counting range |
| — lower limit |
0 |
| — upper limit |
999 |
| IEC counter |
| ● present |
Yes |
| ● Type |
SFB |
| ● Number |
Unlimited (limited only by RAM capacity) |
| S7 times |
| ● Number |
128 |
| Retentivity |
| — can be set |
Yes |
| — lower limit |
0 |
| — upper limit |
128 |
| — 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, total |
all |
| Flag |
| ● Number, max. |
128 byte |
| ● Retentivity available |
Yes; MB 0 to MB 127 |
| ● Retentivity preset |
MB 0 to MB 15 |
| ● Number of clock memories |
8; 1 memory byte |
| Data blocks |
| ● Number, max. |
511; from DB1 to DB511 |
| ● Size, max. |
16 kbyte |
| ● Retentivity adjustable |
No |
| ● Retentivity preset |
Yes |
| Local data |
| ● per priority class, max. |
256 byte |
| Address area |
| I/O address area |
| ● Inputs |
1 kbyte |
| ● Outputs |
1 kbyte |
| Process image |
| ● Inputs |
128 byte |
| ● Outputs |
128 byte |
| Default addresses of the integrated channels |
| — Digital inputs |
124.0 to 125.1 |
| — Digital outputs |
124.0 to 124.5 |
| Digital channels |
| ● Inputs |
256 |
| ● Outputs |
256 |
| ● Inputs, of which central |
256 |
| ● Outputs, of which central |
256 |
| Analog channels |
| ● Inputs |
64 |
| ● Outputs |
32 |
| Hardware configuration |
| Expansion devices, max. |
0 |
| Number of DP masters |
| ● Integrated |
none |
| ● Via CP |
4 |
| Number of operable FMs and CPs (recommended) |
| ● FM |
8 |
| ● CP, point-to-point |
8 |
| ● CP, LAN |
4 |
| Rack |
| ● Racks, max. |
1 |
| ● Modules per rack, max. |
8 |
| Time of day |
| Clock |
| ● Software clock |
Yes |
| ● battery-backed and synchronizable |
No |
| Operating hours counter |
| ● Number |
1 |
| ● Number/Number range |
0 |
| ● Range of values |
0 to 2^31 hours (when using SFC 101) |
| ● Granularity |
1 hour |
| ● retentive |
Yes; Must be restarted at each restart |
| Clock synchronization |
| ● supported |
Yes |
| ● to MPI, master |
Yes |
| ● to MPI, slave |
Yes |
| ● in AS, master |
Yes |
| Digital inputs |
| Number of digital inputs |
10 |
| integrated channels (DI) |
10 |
| 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. |
50 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 |
6 |
| integrated channels (DO) |
6 |
| 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. |
3 A |
| — up to 60 °C, max. |
1.5 A |
| Cable length |
| ● Cable length, shielded, max. |
1 000 m |
| ● Cable length unshielded, max. |
600 m |
| Analog inputs |
| Integrated channels (AI) |
none |
| Analog outputs |
| Integrated channels (AO) |
none |
| Encoder |
| Connectable encoders |
| ● 2-wire sensor |
Yes |
| — Permissible quiescent current (2-wire sensor), max. |
1.5 mA |
| 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 |
6 |
| ● 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 |
| ● User data per job (of which consistent), max. |
64 byte |
| S5-compatible communication |
| ● supported |
Yes; via CP and loadable FC |
| Number of connections |
| ● overall |
6 |
| ● usable for PG communication |
5 |
| — reserved for PG communication |
1 |
| — Adjustable for PG communication, min. |
1 |
| — Adjustable for PG communication, max. |
5 |
| ● usable for OP communication |
5 |
| — reserved for OP communication |
1 |
| — adjustable for OP communication, min. |
1 |
| — adjustable for OP communication, max. |
5 |
| ● usable for S7 basic communication |
2 |
| — Reserved for S7 basic communication |
2 |
| — adjustable for S7 basic communication, min. |
0 |
| — adjustable for S7 basic communication, max. |
2 |
| ● usable for routing |
No |
| S7 message functions |
| Number of login stations for message functions, max. |
6; Depending on the configured connections for PG/OP and S7 basic communication |
| Process diagnostic messages |
Yes |
| simultaneously active Alarm-S blocks, max. |
20 |
| 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 |
| ● Force, variables |
Inputs, outputs |
| ● Number of variables, max. |
10 |
| Integrated Functions |
| Number of counters |
2; 2 channels (see "Technological Functions" manual) |
| Counter frequency (counter) max. |
10 kHz |
| Frequency measurement |
Yes |
| Number of frequency meters |
2; 2 channels up to max. 10 kHz (see "Technological Functions" manual) |
| controlled positioning |
No |
| Integrated function blocks (closed-loop control) |
No |
| PID controller |
No |
| Number of pulse outputs |
2; 2 channels pulse width modulation up to 2.5 kHz (see Manual "Technological Functions") |
| Limit frequency (pulse) |
2.5 kHz |
| Galvanic isolation |
| Galvanic isolation digital inputs |
| ● Galvanic isolation digital inputs |
Yes |
| ● between the channels, in groups of |
10 |
| ● between the channels and the backplane bus |
Yes |
| Galvanic isolation digital outputs |
| ● Galvanic isolation digital outputs |
Yes |
| ● between the channels, in groups of |
6 |
| ● between the channels and the backplane bus |
Yes |
| Configuration |
| Configuration software |
| ● STEP 7 |
Yes; V5.1 SP2 |
| 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 |
| — GRAPH |
Yes |
| — HiGraph® |
Yes |
| Know-how protection |
| ● User program protection/password protection |
Yes |
| Dimensions |
| Width |
80 mm |
| Height |
125 mm |
| Depth |
130 mm |
| Weights |
| Weight, approx. |
409 g |
| last modified: |
25.09.2014 |
