Click here for brief specification of each category in S7-300 CPU spectrum:

• Standard CPUs
• Failsafe CPUs
• Compact CPUs
• Technology CPU
  

Failsafe CPUs

Standard CPUs   Fail-safe CPUs     CPU 318-2 DP CPU 315F-2 DP CPU 317F-2 DP Start of delivery     3rd quarter 2003 (New) Main memory/instructions 512 KByte, of which max. 256 KByte Code and max. 256 KByte instructions 192 Kbyte/36 K F-instructions 512 Kbyte/100 K F-instructions Load memory – 64 Kbyte to 8 Mbyte through MMC Backup 8 Kbyte bit memories, timers, counters, data without batterie all blocks with batterie all blocks to max. 256 Kbyte Processing times Bit operations Word operation Fixed points arithmatic Floating point arithmatic 0.1µs 0.1µs 0.1µs 0.6 µs 0.1µs 0.2µs 2µs 6 µs 0.1µs 0.1µs 0.5 µs 1.5µs Bit memories/timers/counters Bit memories S7 timers/counters IEC timer/counters 1024 byte 512/512 yes 2048 byte 256/256 yes 4096 byte 512/512 yes Number of blocks Number of loadable blocks (Sum of FCs + FBs + DBs) Ranger of numbers 1024 FC, 1024 FB, 2047 DB 1024 FC, 1024 FB, 2047 DB 1024 2048 FC, 2048 FB, 1023 DB 2048 2048 FC, 2048 FB, 2047 DB Organization blocks (OB) real-time interrupt (OB 10, 11) delay alarm (OB 20, 21) time-triggered (OB 32, 35) interrupt-triggered (OB 40, 41) background OB (OB 90) restart (OB 100), asyn. error (OB 80, 81, 82, 84-87) syn. error (OB 121, 122) free cycle (OB 1) real-time interrupt (OB 10) delay alarm (OB 20) time-triggered (OB 35) interrupt-triggered (OB 40) DPVI restart (OB 55-57) restart (OB 100) asyn. error (OB 80, 82, 85-87) syn. error (OB 121,122) Address ranges I/O address area I/O process image Digital channels (central) analog channels (central) 8192/8192 Byte 2048/2048 Byte 1024 256 2048/2048 byte 384/384 byte 1024 256 8192/8192 Byte 1024/1024 Byte 1024 256 Expansions Racks Modules per rack max. 4 8 max. 4 8 DP interfaces Number of DP master systems int./CP 342-5 Equidistant Activation/deactivation of slaves Transmission speed No. of slaves per station Lateral communication 2/2 yes – 12 Mbit/s 32 (MPI-SS), 125 (DP-SS)/ 64 yes; sender and receiver 1/1 yes yes 12 Mbit/s 124 yes 2/2 yes yes 12 Mbit/s 124 yes Dimensions (mm) 160 x 125 x 130 40 x 125 x 130 80 x 125 x 130 Order No. group 6ES7318-2AJ.. 6ES7315-6FF.. 6ES7317-6FF..