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SIMATIC S7-300, CPU 312 CPU WITH MPI INTERFACE, INTEGRATED 24 V DC POWER SUPPLY 32 KBYTE WORKING MEMORY, MICRO MEMORY CARD NECESSARY |
| General information |
| Hardware product version |
01 |
| Firmware version |
V3.3 |
| Engineering with |
| ● Programming package |
STEP 7 V5.5 SP1 or higher or STEP7 V5.2 SP1 or higher with HSP 218 |
| Supply voltage |
| 24 V DC |
Yes |
| permissible range, lower limit (DC) |
19.2 V |
| permissible range, upper limit (DC) |
28.8 V |
| External protection for supply cables (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) |
650 mA |
| Current consumption (in no-load operation), typ. |
140 mA |
| Inrush current, typ. |
3.5 A |
| I²t |
1 A²·s |
| Power losses |
| Power loss, typ. |
4 W |
| Memory |
| Type of memory |
other |
| Work memory |
| ● Integrated |
32 kbyte |
| ● expandable |
No |
| ● Size of retentive memory for retentive data blocks |
32 kbyte |
| Load memory |
| ● pluggable (MMC) |
Yes |
| ● pluggable (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. |
0.1 µs |
| for word operations, typ. |
0.24 µs |
| for fixed point arithmetic, typ. |
0.32 µs |
| for floating point arithmetic, typ. |
1.1 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. |
32 kbyte |
| FB |
| ● Number, max. |
1 024; Number range: 0 to 7999 |
| ● Size, max. |
32 kbyte |
| FC |
| ● Number, max. |
1 024; Number range: 0 to 7999 |
| ● Size, max. |
32 kbyte |
| OB |
| ● Description |
see instruction list |
| ● Size, max. |
32 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 time interrupt OBs |
4; OB 32, 33, 34, 35 |
| ● Number of process alarm OBs |
1; OB 40 |
| ● Number of startup OBs |
1; OB 100 |
| ● Number of asynchronous error OBs |
4; OB 80, 82, 85, 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 |
| — can be set |
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 |
| — can be set |
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, 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 |
| ● Number, max. |
1 024; Number range: 1 to 16000 |
| ● Size, max. |
32 kbyte |
| ● 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 |
1 024 byte |
| ● Outputs |
1 024 byte |
| Process image |
| ● Inputs |
1 024 byte |
| ● Outputs |
1 024 byte |
| ● Inputs, adjustable |
1 024 byte |
| ● Outputs, adjustable |
1 024 byte |
| ● Inputs, default |
128 byte |
| ● Outputs, default |
128 byte |
| Digital channels |
| ● Inputs |
256 |
| ● Outputs |
256 |
| ● Inputs, of which central |
256 |
| ● Outputs, of which central |
256 |
| Analog channels |
| ● Inputs |
64 |
| ● Outputs |
64 |
| ● Inputs, of which central |
64 |
| ● Outputs, of which central |
64 |
| Hardware configuration |
| Expansion devices, max. |
0 |
| Number of DP masters |
| ● Integrated |
0 |
| ● 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; Buffered: No, Can be synchronized: Yes |
| ● Deviation per day, max. |
10 s; Typ.: 2 s |
| ● Behavior of the clock following POWER-ON |
The clock continues at the time of day it had when power was switched off |
| 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 |
| ● 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 USB interfaces |
0 |
| Number of parallel interfaces |
0 |
| Number of 20 mA interfaces (TTY) |
0 |
| Number of RS 232 interfaces |
0 |
| Number of RS 422 interfaces |
0 |
| Number of other interfaces |
0 |
| 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 |
| ● 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; Only server, configured on one side |
| — S7 communication, as client |
No |
| — S7 communication, as server |
Yes |
| Communication functions |
| PG/OP communication |
Yes |
| Data record routing |
No |
| 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 |
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 |
0 |
| — adjustable for S7 basic communication, min. |
0 |
| — adjustable for S7 basic communication, max. |
2 |
| 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. |
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 |
| ● Force, variables |
Inputs, outputs |
| ● Number of variables, max. |
10 |
| Diagnostic buffer |
| ● present |
Yes |
| ● Number of entries, max. |
500 |
| — can be set |
No |
| — Of which powerfail-proof |
100; Only the last 100 entries are retained |
| ● Number of entries readable in RUN, max. |
499 |
| — can be set |
Yes; From 10 to 499 |
| — preset |
10 |
| Service data |
| ● Can be read out |
Yes |
| Ambient conditions |
| Operating temperature |
| ● 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 |
| — 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. |
270 g |
| last modified: |
25.09.2014 |
