Specifications
S7-200 Quick Reference Information
G-3
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
Table G-3 Summary of S7-200 CPU Memory Ranges and Features
Range Limit Accessible as ...
Description
CPU 221 CPU 222 CPU 224 Bit Byte Word
Double
Word
User program size 2 Kwords 2 Kwords 4 Kwords
User data size 1 Kwords 1 Kwords 2.5 Kwords
Process-image input
register
I0.0 to I15.7 I0.0 to I15.7 I0.0 to I15.7 Ix.y IBx IWx IDx
Process-image output
register
Q0.0 to Q15.7 Q0.0 to Q15.7 Q0.0 to Q15.7 Qx.y QBx QWx QDx
Analog inputs
(read only)
-- AIW0 to AIW30 AIW0 to AIW30 AIWx
Analog outputs (write
only)
-- AQW0 to
AQW30
AQW0 to
AQW30
AQWx
Variable memory (V)
1
VB0.0 to
VB2047.7
VB0.0 to
VB2047.7
VB0.0 to
VB5119.7
Vx.y VBx VWx VDx
Local memory (L)
2
LB0.0 to LB63.7 LB0.0 to LB63.7 LB0.0 to LB63.7 Lx.y LBx LW x LDx
Bit memory (M) M0.0 to M31.7 M0.0 to M31.7 M0.0 to M31.7 Mx.y MBx MWx MDx
Special Memory (SM)
Read only
SM0.0 to
SM179.7
SM0.0 to
SM29.7
SM0.0 to
SM179.7
SM0.0 to
SM29.7
SM0.0 to
SM179.7
SM0.0 to
SM29.7
SMx.y SMBx SMWx SMDx
Timers
Ret. on-delay 1 ms
Ret. on-delay 10 ms
Ret. on-delay 100 ms
On/Off delay 1 ms
On/Off delay 10 ms
On/Off delay 100 ms
256 (T0 to T255)
T0, T64
T1 to T4,
T65 to T68
T5 to T31,
T69 to T95
T32, T96
T33 to T36,
T97 to T100
T37 to T63,
T101 to T255
256 (T0 to T255)
T0, T64
T1 to T4,
T65 to T68
T5 to T31,
T69 to T95
T32, T96
T33 to T36,
T97 to T100
T37 to T63,
T101 to T255
256 (T0 to T255)
T0, T64
T1 to T4,
T65 to T68
T5 to T31,
T69 to T95
T32, T96
T33 to T36,
T97 to T100
T37 to T63,
T101 to T255
Tx Tx
Counters C0 to C255 C0 to C255 C0 to C255 Cx Cx
High-speed counter HC0, HC3. HC4,
HC5
HC0, HC3, HC4,
HC5
HC0 to HC5 HCx
Sequential control
relays (S)
S0.0 to S31.7 S0.0 to S31.7 S0.0 to S31.7 Sx.y SBx SWx SDx
Accumulator registers AC0 to AC3 AC0 to AC3 AC0 to AC3 ACx ACx ACx
Jumps/Labels 0 to 255 0 to 255 0 to 255
Call/Subroutine 0 to 63 0 to 63 0 to 63
Interrupt routines 0 to 127 0 to 127 0 to 127
PID loops 0 to 7 0 to 7 0 to 7
Port Port 0 Port 0 Port 0
1
All V memory can be saved to permanent memory.
2
LB60 to LB63 are reserved by STEP 7-Micro/WIN 32, version 3.0 or later.