Instruction List
B-4
ET 200S Interface Module IM 151/CPU
A5E00058783-01
Address Registers AR1 and AR2 (32 Bits)
The address registers contain the area-specific or general addresses for
instructions that use register-indirect addressing. The address registers are 32 bits
long.
The area-internal and/or area-crossing addresses have the following structure:
Area-internal address:
00000000 00000bbb bbbbbbbb bbbbbxxx
Area-crossing address:
10000yyy 00000bbb bbbbbbbb bbbbbxxx
Legend:
b
Byte address
x
Bit number
y
Area identifier (see Appendix B.4)
Status Word (16 Bits)
The status word bits are evaluated or set by the instructions.
The status word is 16 bits long.
Bit
Assign-
ment
Description
0
/FC
First check bit *
1
RLO
Result of (previous) logic operation
2
STA
Status *
3
OR
Or *
4
OS
Stored overflow
5
OV
Overflow
6
A0
Condition code
7
A1
Condition code
8
BR
Binary result
9 ...
15
Unassigned
–
* Bit cannot be evaluated in the user program with the L STW instruction,
since it is not updated at program runtime.
Summary of Contents for SIMATIC IM 151/CPU
Page 6: ...Important Information vi ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 14: ...Contents xiv ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 42: ...ET 200S in the PROFIBUS Network 3 12 ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 68: ...Commissioning and Diagnostics 4 26 ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 98: ...Technical Specifications 6 8 ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 108: ...Cycle and Response Times 7 10 ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 190: ...Execution Times of the SFCs and SFBs C 4 ET 200S Interface Module IM 151 CPU A5E00058783 01 ...
Page 196: ...Migration of the IM 151 CPU D 6 ET 200S Interface Module IM 151 CPU A5E00058783 01 ...