| SIMATIC S7-300, CPU 314 IFM COMPACT CPU WITH MPI, FOR EXPANDED TEMPERATURE RANGE, 16DI/16DO, 4AI/1AO, 2 X 40 PIN, INTEGRATED 24V DC POWER SUPPLY, 32 KBYTE WORKING MEMORY |
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Supply voltage |
Rated voltage/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 | 1000 mA |
Inrush current, max. | 8 A |
Power losses |
Power loss, typ. | 16 W |
Memory |
Work memory |
integrated | 32 kbyte; 32 KB/10 K instructions RAM (integrated); 1 instruction means 3 bytes on average |
Load memory |
integrated RAM, max. | 48 kbyte |
Backup |
with battery | Yes; all blocks |
without battery | Yes; 144 bytes: Bit memories, counters, timers and data |
CPU processing times |
for bit operations, min. | 0.3 µs |
for bit operations, max. | 0.6 µs |
for word operations, min. | 1 µs |
for fixed point arithmetic, min. | 2 µs |
for floating point arithmetic, min. | 50 µs |
for timer/counter operations, min. | 12 µs |
CPU-blocks |
DB |
Number, max. | 127 |
Size, max. | 8 kbyte |
FB |
Number, max. | 128 |
Size, max. | 8 kbyte |
FC |
Number, max. | 128 |
Size, max. | 8 kbyte |
OB |
Description | see instruction list |
Size, max. | 8 kbyte |
Number of free cycle OBs | 1; OB 1 |
Number of time alarm OBs | 1; OB 10 |
Number of time interrupt OBs | 1; OB 35 |
Number of process alarm OBs | 1; OB 40 |
Number of startup OBs | 1; OB 100 |
Nesting depth |
per priority class | 8 |
Counters, timers and their retentivity |
S7 counter |
Number | 64 |
of which retentive with battery |
adjustable | Yes |
lower limit | 0 |
upper limit | 63 |
of which retentive without battery |
adjustable | Yes |
lower limit | 0 |
upper limit | 63 |
Counting range |
lower limit | 1 |
upper limit | 999 |
S7 times |
Number | 128 |
of which retentive with battery |
adjustable | Yes |
lower limit | 0 |
upper limit | 71 |
of which retentive without battery |
adjustable | Yes |
lower limit | 0 |
upper limit | 71 |
Time range |
lower limit | 10 ms |
upper limit | 9990 s |
Data areas and their retentivity |
Flag |
Number, max. | 256 byte |
Retentivity available | Yes; MB 0 to MB 255 |
of which retentive with battery | 0 to 2047 (M 0.0 to M 255.7, adjustable) |
of which retentive without battery | 0 to 1152 (M 0.0 toM 143.7, adjustable) |
Address area |
I/O address area |
Inputs | 512 byte |
Outputs | 512 byte |
Process image |
Inputs | 128 byte |
Outputs | 128 byte |
Digital channels |
Inputs | 992 |
Outputs | 992 |
Analog channels |
Inputs | 248 |
Outputs | 124 |
Addressing volume |
Outputs | 122 byte |
Inputs | 122 byte |
Address space per module |
Address space per module, max. | 512 byte |
Hardware configuration |
Modules per rack, max. | 31 |
Expansion devices, max. | 3 |
Connectable programming devices/PCs | PGs/PCs with STEP 7 connectable via MPI interface |
Number of modules per DP slave interface, max. | 16 |
Number of DP masters |
via CP | 1; CP 342-5 |
Number of operable FMs and CPs (recommended) |
FM | 4 |
CP, point-to-point | 2 |
CP, LAN | 1 |
Time of day |
Clock |
Hardware clock (real-time clock) | Yes |
Digital inputs |
Number/binary inputs | 20; of which 4 channels can be used for process alarms or integrated functions |
Input voltage |
Rated value, DC | 24 V |
for signal "0" | -3 to +5 V |
for signal "1" | 15 to 30 V |
Input current |
for signal "1", typ. | 7 mA; Min. 2 mA |
Input delay (for rated value of input voltage) |
for standard inputs |
at "0" to "1", max. | 5 ms; typically 3 ms
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