CPU 224 The compact high-performance CPU With 24 inputs/outputs on board Expandable with up to 7 expansion modules Design The CPU 224 is equipped with the following: Integral 24 V encoder/load current supply: For direct connection of sensors and encoders. With 280 ma, output current can also be used as load power supply. 2 device versions: With different power supply and control voltages. Integral digital inputs/outputs: 14 inputs and 10 outputs. 1 communication interface: Optional As PPI interface with PPI protocol for programming functions, HMI functions (TD 200, OP), S7-200 internal CPU/CPU communication (9.6/19.2/187.5 Kbit/s) or as MPI slave for data exchange with MPI masters (S7-300/-400, OPs, TDs, pushbutton panels). Freely-programmable interface (freeport) with interrupt facility for serial data exchange with third-party devices, e.g. with ASCII protocol baud rates 1.2/2.4/4.8/9.6/19.2/38.4/57.6/115.2 Kbit/s; PC/PPI cable can be used as RS 232/RS 485 converter. Page 124 Mar 2008 Siemens ITS
Expansion bus: Connection of expansion modules (only EMs of the 22x series can be used). Interrupt inputs: For extremely fast response to rising or falling edges of process signals. Fast counters: 6 fast counters (30 khz), with parameterizable enable and reset input, can be used simultaneously as up and down counters with 2 separate inputs or for connecting incremental encoders with 2 pulse trains (4x20 khz) offset by 90 o. Problem-free expansion with digital and analog expansion modules (EM, optional). Simulator (optional): For simulating the integral inputs and for testing the user program. Analog potentiometer: 2 analog potentiometer, can be conveniently used in everyday work as a setpoint encoder, e.g. for setting times. Pulse outputs: 2 high-frequency pulse outputs (max. 20 khz); can be used for positioning tasks and for driving frequencycontrolled motors and stepping motors via power circuitry. Real-time clock: e.g. for assignment of time stamps to messages, for recording machine runtimes, or for time control of processes. EEPROM submodule (optional): For saving the complete STEP 7-Micro/WIN user program as well as other documents. For supporting the data logging function and recipe management. Permits fast changing of program (even without programming device) and additional program archiving. Page 125 Mar 2008 Siemens ITS
Battery module for long-term backup: To increase the storage period up to typically 200 days. Without a battery module, user data (e.g. bit memory states, data blocks, times, counts) are saved by an internal high-performance capacitor for approx. 5 days. The program is always saved permanently (maintenance-free). The battery module is inserted into the slot for the memory submodule. Device variants Variant Supply voltage Input voltage Output voltage Output current DC outputs 24 V DC 24 V DC 24 V DC 0.75 A, transistor Relay outputs 85 264 V AC 24 V DC 24 V DC, 24 230 V AC 2 A, relay Page 126 Mar 2008 Siemens ITS
Function Extensive instruction set: A large number of Basic operations such as binary logic operations, result allocation, save, count, create times, load, transfer, compare, shift, rotate, create complement, call subprogram (with local variables) Integrated communication instructions (e.g., S7-200 communication (Network read NETR, Network write NETW) or Freeport (Transmit XMT, Receive RCV)) User-friendly functions such as pulse-duration modulation, pulse sequence function, arithmetic functions, floating-point arithmetic, PID closed-loop control, jump functions, loop functions and code conversions simplify programming Counting: User-friendly counting functions in conjunction with the integrated counters and special commands for highspeed counters open up new application areas for the user Interrupt handling: Edge-triggered interrupts (activated by rising or falling edges of process signals on interrupt inputs) support a rapid response to process events Time-controlled interrupts can be set at 1 ms increments from 1 ms to 255 ms Counter interrupts can be triggered when a setpoint is reached or when the direction of counting changes Communication interrupts make exchanging information with peripheral devices such as printers or bar code readers quick and easy Direct interrogation and control of inputs/outputs: Inputs and outputs can also be scanned and set directly independent of the cycle. The controller is then able to respond quickly to process events (e.g., direct resetting of outputs on the occurrence of an interrupt). Page 127 Mar 2008 Siemens ITS
Password protection: The 3-level password protection concept effectively safeguards your know-how. The protection concept has the following options for access to the user program: Full access: the program can be altered as desired. Read-only: the program is protected against unauthorized changes. Testing, setting system parameters and copying the program are possible. Complete protection: the program is protected against modification and unauthorized readout and copying. Parameter settings are supported. Test and diagnostic functions: User-friendly functions support testing and diagnostics: The entire program is executed and analyzed using a definable number of cycles. Internal parameters such as bit memories, timers or counters, are logged in a max. of 124 cycles. "Forcing of inputs and outputs during test and diagnostic operation: Inputs and outputs can be set independently of cycle and thus permanently, for example, to test the user program. Runtime edit: In RUN mode, programs can be edited and modified programs can be loaded into the CPU at the click of a mouse, without having to interrupt the current program. Additional mathematical modules such as SIN, COS, TAN, LN, EXP Data logging: Time-controlled or event-controlled saving of data records on the EEPROM memory submodule, e.g. performance data, statistical data, fault/error messages, optionally with a time tag. The log file can be transferred at any time using the S7 Explorer in STEP 7-Micro/WIN Page 128 Mar 2008 Siemens ITS
Recipe management: Recipes are defined and downloaded within the STEP 7-Micro/WIN project. For better memory utilization, the recipes are stored in the EEPROM memory submodule. The recipes can be modified and updated online. Programming The STEP 7-Micro/WIN32 V4 programming package permits complete programming of all S7-200 CPUs. Note: The CPU 224 cannot be programmed using STEP 7-Micro/DOS. If programming is to take place via the serial interface of the PG/PC, the PC/PPI cable is required additionally. If the STEP 7 Micro/Win V4 programming software is used, programming can take place via the SIMATIC CP 5511 or CP 5611 (see SIMATIC NET) as well as via the MPI interface of the programming device. This increases the maximum permissible transmission rate to 187.5 kbps. Technical specifications Page 129 Mar 2008 Siemens ITS
Technical specifications 6ES7 214-1AD23-0XB0 6ES7 214-1BD23-0XB0 Supply voltage 24 V DC Yes permissible range, lower limit20.4 V (DC) permissible range, upper 28.8 V limit (DC) 120 V AC Yes 230 V AC Yes Line frequency Page 130 Mar 2008 Siemens ITS
Frequency of the supply 63 Hz voltage Load voltage L+ Rated value (DC) 24 V 24 V permissible range, lower limit 20.4 V 5 V (DC) permissible range, upper limit 28.8 V 30 V (DC) Load voltage L1 Rated value (AC) 100 V; 100 to 230 V AC permissible range, lower limit 5 V (AC) permissible range, upper limit 250 V (AC) permissible frequency range, 47 Hz lower limit permissible frequency range, 63 Hz upper limit Input current Inrush current, max. 12 A; at 28.8 V 20 A; at 264 V from supply voltage L+, max. 700 ma; 110 to 700 ma, output current for expansion modules (DC 5 V) 660 ma Page 131 Mar 2008 Siemens ITS
from supply voltage L1, max. 200 ma; 30 to 100 ma (240 V); 60 to 200 ma (120 V); output current for expansion modules (5 V DC) 600 ma Encoder supply 24 V encoder supply 24 V Yes; permissible range: Yes; Permissible range: 15.4 to 28.8 V 20.4 to 28.8 V Short-circuit protection Yes; electronic at 280 Yes; electronic at 280 ma ma Output current, max. 280 ma 280 ma Backup battery Battery operation Backup time, max. Memory Number of memory modules (optional) 100 h; (min. 70 h at 100 h; (min. 70 h at 40 40 C); 200 days (typ.) C); 200 days (typ.) with with optional battery optional battery module module 1; pluggable memory module, content identical with integral EEPROM; 1; pluggable memory module, content identical with integral EEPROM; Page 132 Mar 2008 Siemens ITS
; can additionally store recipes, data logs and other files Data and program memory Data memory, max. 8 Kibyte 8 Kibyte Program memory, max. 12 Kibyte; 8 KB with active run-time edit Backup present Yes; Program: Entire program maintenance-free on integral EEPROM, programmable via CPU; data: Entire DB 1 loaded from PG/PC maintenance-free on integral EEPROM, current values of DB 1 in RAM, retentive memory bits, timers, counters, etc. maintenance-free via high-performance capacitor; optional battery for long-term buffering ; can additionally store recipes, data logs and other files 12 Kibyte; 8 KB with active run-time edit Yes; Program: Entire program maintenance-free on integral EEPROM, programmable via CPU; data: Entire DB 1 loaded from PG/PC maintenance-free on integral EEPROM, current values of DB 1 in RAM, retentive memory bits, timers, counters, etc. maintenance-free via highperformance capacitor; optional battery for long-term buffering Page 133 Mar 2008 Siemens ITS
CPU processing times for bit operations, max. 0.22 µs 0.22 µs Counters, timers and their retentivity S7 counter Number 256 256 of which retentive with battery Yes; via high-performanceyes; via high-performance adjustable capacitor or battery capacitor or battery 1 1 lower limit 256 256 upper limit Counting range 0 0 lower limit 32 767 32 767 upper limit S7 times Number 256 256 of which retentive with battery Page 134 Mar 2008 Siemens ITS
adjustable upper limit Time range lower limit upper limit Yes; via highperformance capacitor or battery 64 64 1 ms 1 ms 54 min; 4 timers: 1 ms to 30 s; 16 timers: 10 ms to 5 min; 236 timers: 100 ms to 54 min Yes; via high-performance capacitor or battery 54 min; 4 timers: 1 ms to 30 s; 16 timers: 10 ms to 5 min; 236 timers: 100 ms to 54 min Data areas and their retentivity Flag Number, max. 32 byte 32 byte Retentivity available Yes; M 0.0 to M 31.7 Yes; M 0.0 to M 31.7 of which retentive with battery of which retentive without battery 0 to 255, via highperformance capacitor or battery, adjustable 0 to 112 in EEPROM, adjustable 0 to 255, via high-performance capacitor or battery, adjustable 0 to 112 in EEPROM, adjustable Page 135 Mar 2008 Siemens ITS
Hardware configuration Expansion devices, max. Connectable programming devices/pcs Expansion modules Analog inputs/outputs, max. 7; Only expansion modules of the S7-22x series can be used. Due to the limited output current, the use of expansion modules may be limited. SIMATIC PG/PC, standard PC 35; max. 28 inputs and 7 outputs (EM) or max. 0 inputs and 14 outputs (EM) 168; max. 94 inputs and 7; Only expansion modules of the S7-22x series can be used. Due to the limited output current, the use of expansion modules may be limited. SIMATIC PG/PC, standard PC 35; max. 28 inputs and 7 outputs (EM) or max. 0 inputs and 14 outputs (EM) Digital inputs/outputs, max. 168; max. 94 inputs and 74 74 outputs (CPU + EM) outputs (CPU + EM) AS-Interface inputs/outputs 62; AS-Interface A/B 62; AS-Interface A/B slaves max. slaves (CP 243-2) (CP 243-2) Digital inputs Number/binary inputs 14 14 m/p-reading Yes; optionally, per Yes; optionally, per group group Page 136 Mar 2008 Siemens ITS
Input voltage Rated value, DC 24 V 24 V for signal "0" 0 to 5 V 0 to 5 V for signal "1" min. 15 V min. 15 V Input current for signal "1", typ. 2.5 ma 2.5 ma Input delay (for rated value of input voltage) for standard inputs Yes; all Yes; all Parameterizable 0.2 ms 0.2 ms at "0" to "1", min. 12.8 ms 12.8 ms at "0" to "1", max. for interrupt inputs Yes; I 0.0 to I 0.3 Yes; I 0.0 to I 0.3 Parameterizable for counter/technological functions Yes; (E0.0 to E1.5) 30 Yes; (E0.0 to E1.5) 30 khz Parameterizable khz Page 137 Mar 2008 Siemens ITS
Cable length Cable length, shielded, max. 500 m; Standard input: 500 m, high-speed counters: 50 m Cable length unshielded, max. Digital outputs 300 m; not for high-speed signals 500 m; Standard input: 500 m, high-speed counters: 50 m 300 m; not for high-speed signals Number/binary outputs 10; Transistor 10; Relay Functionality/short-circuit No; to be provided No; to be provided externally strength externally Limitation of inductive 1 W shutdown voltage to Switching capacity of the outputs with resistive load, max. 0.75 A 2 A on lamp load, max. 5 W 200 W; 30 W DC; 200 W AC Output voltage for signal "1", min. 20 V DC L+/L1 Output current for signal "1" rated value 750 ma 2 A for signal "0" residual current, max. 10 µa 0 ma Page 138 Mar 2008 Siemens ITS
Output delay with resistive load 0 to "1", max. 15 µs; of the standard 10 ms; all outputs outputs, max. (Q0.2 to Q1.1) 2 µs; of the pulse outputs, max. (Q0.0 to Q0.1) 2 µs 1 to "0", max. 130 µs; of the standard 10 ms; all outputs outputs, max. (Q0.2 to Q1.1) 10 µs; of the pulse outputs, max. (Q0.0 to Q0.1) 10 µs Parallel switching of 2 outputs for increased power Yes No Switching frequency of the pulse outputs, with 20 khz; Q0.0 to Q0.1 1 Hz resistive load, max. Aggregate current of outputs (per group) 6 A 10 A up to 40 C, max. horizontal installation Page 139 Mar 2008 Siemens ITS
6 A 10 A up to 55 C, max. Cable length Cable length, shielded, max. 500 m 500 m Cable length unshielded, 150 m 150 m max. Relay outputs Number of operating cycles 10 000 000; mechanically 10 million, at rated load voltage 100,000 Analog inputs Number of analog potentiometers 2; Analog potentiometer; resolution 8 bit Encoder Connectable encoders 2-wire BEROS Yes Yes 1 ma 1 ma permissible quiescent current (2-wire BEROS), max. 1st interface Type of interface Integrated RS 485 interface 2; Analog potentiometer; resolution 8 bit Integrated RS 485 interface Page 140 Mar 2008 Siemens ITS
Physics RS 485 RS 485 Functionality MPI PPI Serial data exchange Yes; As MPI slave for data exchange with MPI masters (S7-300/S7-400 CPUs, OPs, TDs, Push Button Panels); S7-200- internal CPU/CPU communication is possible in the MPI network with restrictions; transmission rates: 19.2/187.5 kbit/s Yes; with PPI protocol for program functions, HMI functions (TD 200, OP), S7-200-internal CPU/CPU communication ; transmission rates 9.6/19.2/187.5 kbit/s Yes; As freely programmable interface with interrupt facility for serial data exchange with third-party devices with Yes; As MPI slave for data exchange with MPI masters (S7-300/S7-400 CPUs, OPs, TDs, Push Button Panels); S7-200-internal CPU/CPU communication is possible in the MPI network with restrictions; transmission rates: 19.2/187.5 kbit/s Yes; with PPI protocol for program functions, HMI functions (TD 200, OP), S7-200-internal CPU/CPU communication ; transmission rates 9.6/19.2/187.5 kbit/s Yes; As freely programmable interface with interrupt facility for serial data exchange with third-party devices with ASCII protocol transfer rates: Page 141 Mar 2008 Siemens ITS
MPI ASCII protocol transfer 1.2 / 2.4 / 4.8 / 9.6 / 19.2 / rates: 1.2 / 2.4 / 4.8 / 38.4 / 57.6 / 115.2 kbit/s; the 9.6 / 19.2 / 38.4 / 57.6 / PC/PPI cable can also be used 115.2 kbit/s; the PC/PPI as RS232/RS485 converter cable can also be used as RS232/RS485 converter Transmission rate, max. 187.5 kbit/s 187.5 kbit/s Transmission rate, min. 19.2 kbit/s 19.2 kbit/s Integrated Functions Number of counters 6; High-speed counters 6; High-speed counters (30 khz (30 khz each), 32 bits each), 32 bits (incl. sign), can (incl. sign), can be used be used as up/down counters or as up/down counters or for connecting 2 incremental for connecting 2 encoders with 2 pulse trains incremental encoders offset by 90 (max. 20 khz with 2 pulse trains offset (A/B counters)); parameterizable by 90 (max. 20 khz enable and reset input; interrupt (A/B counters)); facilities (incl. call of parameterizable enable subroutine with any content) and reset input; interrupt when the setpoint is reached; facilities Page 142 Mar 2008 Siemens ITS
(incl. call of subroutine with any content) when the setpoint is reached; reversal in counting direction, etc. Counter frequency (counter) 30 khz 30 khz max. Number of alarm inputs 4; 4 rising edges and/or 4 falling edges Number of pulse outputs 2; High-speed outputs, 20 khz, with interrupt option; pulse-width and frequency modulation option Limit frequency (pulse) Galvanic isolation Galvanic isolation digital inputs 20 khz between the channels Yes Yes between the channels, in groups of 6 and 8 6 and 8 Galvanic isolation digital outputs reversal in counting direction, etc. between the channels Yes; Optocoupler Yes; Relay 4; 4 rising edges and/or 4 falling edges Page 143 Mar 2008 Siemens ITS
between the channels, in groups of Permissible potential difference between different circuits Ambient conditions Environmental conditions 5 3 and 4 500 V DC between 24 V DC and 5 V DC For further environmental conditions, see "Automation System S7-200, System Manual" Operating temperature vertical installation, min. 0 C 0 C vertical installation, max. 45 C 45 C horizontal installation, min. 0 C 0 C horizontal installation, max. 55 C 55 C Air pressure permissible range, min. 860 hpa 860 hpa permissible range, max. 1 080 hpa 1 080 hpa 500 V DC between 24 V DC and 5 V DC; 1500 V AC between 24 V DC and 230 V AC For further environmental conditions, see "Automation System S7-200, System Manual" Page 144 Mar 2008 Siemens ITS
Relative humidity Operation, min. 5 % 5 % Operation, max. 95 %; RH class 2 in 95 %; RH class 2 in accordance with IEC 1131-2 accordance with IEC 1131-2 Degree and class of protection IP20 Yes Yes Configuration programming Programming language Yes Yes LAD Yes Yes FBD Yes Yes STL Command set Bit logic instructions, compare instructions, timer instructions, counter instructions, clock instructions, transmissions instructions, table Bit logic instructions, compare instructions, timer instructions, counter instructions, clock instructions, transmissions instructions, table Page 145 Mar 2008 Siemens ITS
instructions, logic instructions, shift and rotate instructions, conversion instructions, program control instructions, interrupt and communications instructions, logic stack instructions, integer maths, floating-point math instructions, numerical functions instructions, logic instructions, shift and rotate instructions, conversion instructions, program control instructions, interrupt and communications instructions, logic stack instructions, integer maths, floating-point math instructions, numerical functions Program processing Program organization Number of subroutines, max. Know-how protection User program protection/password protection free cycle (OB 1), interruptcontroller, time-controlled (1 to 255 ms) 1 OB, 1 DB, 1 SDB subroutines with/without parameter transfer 64 64 Yes; 3-stage password protection free cycle (OB 1), interruptcontroller, time-controlled (1 to 255 ms) 1 OB, 1 DB, 1 SDB subroutines with/without parameter transfer Yes; 3-stage password protection Page 146 Mar 2008 Siemens ITS
Connection method Plug-in I/O terminals Yes Yes Dimensions Width 120.5 mm 120.5 mm Height 80 mm 80 mm Depth 62 mm 62 mm Weight Weight, approx. 360 g 410 g Page 147 Mar 2008 Siemens ITS