|
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, 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
|
Current consumption (rated value)
|
500 mA
|
Inrush current, typ.
|
11 A
|
Power loss
|
Power loss, typ.
|
6 W; incl. integrated inputs/outputs
|
Memory
|
Work memory
|
|
● integrated
|
16 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.
|
0.2 µs
|
for bit operations, max.
|
0.4 µs
|
for word operations, typ.
|
1 µs
|
for fixed point arithmetic, typ.
|
2 µs
|
for floating point arithmetic, typ.
|
30 µs
|
CPU-blocks
|
DB
|
● Number, max.
|
63; DB 0 reserved
|
FB
|
● Number, max.
|
64
|
FC
|
● Number, max.
|
64
|
OB
|
● Size, max.
|
16 kbyte
|
● Number of time alarm OBs
|
1
|
● Number of delay alarm OBs
|
1
|
● Number of cyclic 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
|
128
|
Retentivity
|
— adjustable
|
Yes
|
— lower limit
|
0
|
— upper limit
|
128
|
Counting range
|
— lower limit
|
1
|
— upper limit
|
999
|
IEC counter
|
● present
|
Yes
|
● Type
|
SFB
|
S7 times
|
● Number
|
128
|
Retentivity
|
— adjustable
|
Yes
|
— lower limit
|
0
|
— upper limit
|
128
|
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.
|
128 byte
|
● Retentivity preset
|
MB 0 to MB 15
|
Address area
|
I/O address area
|
● Inputs
|
1 kbyte
|
● Outputs
|
1 kbyte
|
Process image
|
● Inputs
|
128 byte
|
● Outputs
|
128 byte
|
Digital channels
|
● Inputs
|
256
|
● Outputs
|
256
|
Analog channels
|
● Inputs
|
64
|
● Outputs
|
32
|
Hardware configuration
|
Number of expansion units, max.
|
0
|
Number of DP masters
|
● via CP
|
1
|
Number of operable FMs and CPs (recommended)
|
● FM
|
4
|
● CP, PtP
|
2
|
● CP, LAN
|
1
|
Rack
|
● Racks, max.
|
1
|
● Modules per rack, max.
|
8
|
Time of day
|
Clock
|
● Software clock
|
Yes
|
● retentive and synchronizable
|
No
|
Operating hours counter
|
● Number
|
1
|
Clock synchronization
|
● supported
|
Yes
|
Digital inputs
|
Number of digital inputs
|
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
|
— at "0" to "1", max.
|
100 µs; 0.1 / 0.3 / 3 / 15 ms
|
For technological functions
|
— at "0" to "1", max.
|
50 µs
|
Cable length
|
● shielded, max.
|
1 000 m; 100 m for technological functions
|
● unshielded, max.
|
600 m
|
Digital outputs
|
Number of digital outputs
|
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 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
|
Total current of the outputs (per group)
|
all mounting positions
|
— up to 40 °C, max.
|
3 000 mA
|
— up to 60 °C, max.
|
1 500 mA
|
Cable length
|
● shielded, max.
|
1 000 m
|
● unshielded, max.
|
600 m
|
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
|
1. Interface
|
Protocols
|
● MPI
|
Yes
|
● PROFIBUS DP master
|
No
|
● PROFIBUS 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
|
— 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 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
|
● supported
|
Yes
|
● as server
|
Yes
|
● as client
|
No
|
● User data per job, max.
|
64 kbyte
|
Number of connections
|
● overall
|
6
|
● usable for PG communication
|
|
— reserved for PG communication
|
1
|
— adjustable for PG communication, max.
|
5
|
● usable for OP communication
|
|
— reserved for OP communication
|
1
|
— adjustable for OP communication, max.
|
5
|
● usable for S7 basic communication
|
|
— reserved for S7 basic communication
|
2
|
— adjustable for S7 basic communication, max.
|
2
|
S7 message functions
|
Number of login stations for message functions, max.
|
3
|
Integrated Functions
|
|
Number of counters
|
2
|
Counting frequency (counter) max.
|
10 kHz
|
Frequency measurement
|
Yes
|
Number of pulse outputs
|
2
|
Limit frequency (pulse)
|
2.5 kHz
|
Potential separation
|
Potential separation digital inputs
|
● Potential separation digital inputs
|
Yes
|
● between the channels, in groups of
|
10
|
● between the channels and backplane bus
|
Yes
|
Potential separation digital outputs
|
● Potential separation digital outputs
|
Yes
|
● between the channels, in groups of
|
6
|
● between the channels and backplane bus
|
Yes
|
Configuration
|
Configuration software
|
● STEP 7
|
Yes; V5.1 SP2
|
Programming
|
|
● Nesting levels
|
8
|
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.
|
410 g
|
last modified:
|
04/07/2020
|