Siemens SIMATIC S7-300 CPU

Siemens Simatic S7-300 CPU 312 6ES7312-1AE14-0AB0

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SIMATIC S7-300, CPU 312 Central processing unit with MPI, Integr. power supply 24 V DC, Work memory 32 KB, Micro Memory Card required.

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Description

Siemens Simatic S7-300 CPU 312 6ES7312-1AE14-0AB0

General information
HW functional status 01
Firmware version V3.3
Engineering with
● Programming package STEP 7 V5.5 + SP1 or higher or STEP 7 V5.2 + SP1 or higher with HSP 218
Supply voltage
Rated value (DC) 24 V
permissible range, lower limit (DC) 19.2 V
permissible range, upper limit (DC) 28.8 V
external protection for power supply lines (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 loss
Power loss, typ. 4 W
Memory
Work memory
● integrated 32 kbyte
● expandable No
Load memory
● Plug-in (MMC) Yes
● Plug-in (MMC), max. 8 Mbyte
● Data management on MMC (after last programming),min. 10 a
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
● Number, max. 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 cyclic 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
— adjustable 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
— adjustable 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)
ata areas and their retentivity
Retentive data area (incl. timers, counters, flags), max. 32 kbyte
Flag
● Size, 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