Siemens Central Processing Units (CPU) S7-200 series 

Feature

- S7-200 CPU models CPU 221, CPU 222, CPU 224, CPU 224XP, and CPU 226 to include: New CPU hardware support (option to turn off run mode edit to get more program memory, CPU 224XP supports onboard analog I/O and two communication ports. CPU 226 includes additional input filters and pulse catch)

- New memory cartridge support: S7-200 Explorer browser utility, memory cartridge transfers, compares, and programming selections

- STEP 7--Micro/WIN, version 4.0, a 32-bit programming software package for the S7-200 to include:

New and improved tools that support the latest CPU enhancements: PID Auto-Tuning Control Panel, PLCs built-in Position Control Wizard, Data Log Wizard, and Recipe Wizard

New diagnostic tool: configuring diagnostic LED

New instructions: Daylight Savings time (READ_RTCX and SET_RTCX), Interval Timers (BITIM, CITIM), Clear Interrupt Event (CLR_EVNT), and Diagnostic LED (DIAG_LED)

POU and library enhancements: new string constants, added indirect addressing support

on more memory types, improved support of the USS library read and write parametization for Siemens master drives

Improved Data Block: Data Block Pages, Data Block auto-increment

Improved usability of STEP 7--Micro/WIN

Specifications

Document of Siemens Central Processing Units (CPU) S7-200 series