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Shift and Rotate Instructions
Statement List (STL) for S7-300 and S7-400 Programming
11-2
A5E00706960-01
11.1.2 SSI Shift Sign Integer (16-Bit)
Formate
SSI
SSI <number>
Address Data type Description
<number> integer, unsigned number of bit positions to be shifted, range
from 0 to 15
Description
SSI (shift right with sign integer) shifts only the contents of ACCU 1- L to the right bit
by bit. The bit places that are vacated by the shift instruction are filled with the signal
state of the sign bit (bit 15). The bit that is shifted out last is loaded into the status
word bit CC 1. The number of bit positions to be shifted is specified either by the
address <number> or by a value in ACCU 2-L-L.
SSI <number>: The number of shifts is specified by the address <number>. The
permissible value range is from 0 to 15. The CC 0 and OV status word bits are reset
to 0 if <number> is greater than zero. If <number> is equal to zero, the shift
instruction is regarded as a NOP operation.
SSI:
The number of shifts is specified by the value in ACCU 2- L- L. The possible
value range is from 0 to 255. A shift number >16 always produces the same result
(ACCU 1 = 16#0000, CC 1 = 0, or ACCU 1 = 16#FFFF, CC 1 = 1). If the shift number
is greater than 0, the status word bits CC 0 and OV are reset to 0. If the shift number
is zero, then the shift instruction is regarded as a NOP operation.
Status word
BR CC 1 CC 0 OV OS OR STA RLO /FC
writes: - x x x - - - - -
Examples
Contents ACCU1-H ACCU1-L
Bit 31 . . . . . . . . . . 16 15 . . . . . . . . . . 0
before execution of SSI 6
0101 1111 0110 0100 1001 1101 0011 1011
after execution of SSI 6
0101 1111 0110 0100 1111 1110 0111 0100
- A5E00706960-01 1
- Safety Guidelines 2
- Qualified Personnel 2
- Prescribed Usage 2
- Trademarks 2
- Disclaimer of Liability 2
- Preface 3
- Requirements 4
- Online Help 5
- Further Support 5
- Training Centers 5
- Technical Support 6
- Contents 12
- 1 Bit Logic Instructions 13
- 1.2 A And 15
- 1.3 AN And Not 16
- 1.4 O Or 17
- 1.5 ON Or Not 18
- 1.6 X Exclusive Or 19
- 1.7 XN Exclusive Or Not 20
- 1.8 O And before Or 21
- Bit Logic Instructions 23
- Bit Logic Instructions 24
- 1.15 ) Nesting Closed 26
- 1.16 = Assign 28
- 1.17 R Reset 29
- 1.18 S Set 30
- 1.19 NOT Negate RLO 31
- 1.20 SET Set RLO (=1) 32
- 1.21 CLR Clear RLO (=0) 33
- 1.23 FN Edge Negative 35
- 1.24 FP Edge Positive 37
- 2 Comparison Instructions 39
- RLO values 40
- 3 Conversion Instructions 43
- 3.15 RND Round 57
- 3.16 TRUNC Truncate 58
- 4 Counter Instructions 61
- LC Z3 64
- 4.5 R Reset Counter 65
- 4.7 CU Counter Up 67
- 4.8 CD Counter Down 68
- 5 Data Block Instructions 69
- Data Block Instructions 72
- Data Block Instructions 73
- 6 Logic Control Instructions 75
- 6.3 JL Jump to Labels 78
- 6.4 JC Jump if RLO = 1 79
- 6.5 JCN Jump if RLO = 0 80
- <jump 82
- 6.8 JBI Jump if BR = 1 83
- 6.9 JNBI Jump if BR = 0 84
- 6.10 JO Jump if OV = 1 85
- 6.11 JOS Jump if OS = 1 86
- 6.12 JZ Jump if Zero 87
- 6.13 JN Jump if Not Zero 88
- 6.14 JP Jump if Plus 89
- 6.15 JM Jump if Minus 90
- 6.19 LOOP Loop 94
- 7 Integer Math Instructions 95
- Instructions 96
- Format 100
- Description 100
- Status word 100
- Example 100
- Example: 13 divided by 4 101
- Example 1 102
- Example 2 102
- Example 3 103
- (32-Bit) 105
- IEEE-FP) 113
- (32-Bit IEEE-FP) 115
- Description of instruction 120
- Result 120
- Number (32-Bit) 122
- Numbers (32-Bit) 126
- 9.2 L Load 132
- Contents of ACCU 1 133
- Integer (32-Bit Pointer) 136
- Register 2 137
- 9.9 T Transfer 139
- (32-Bit Pointer) 142
- 10.2 BE Block End 146
- 10.5 CALL Block Call 149
- 10.6 Call FB 151
- Program Control Instructions 152
- 10.7 Call FC 153
- 10.8 Call SFB 155
- 10.9 Call SFC 157
- 10.10 Call Multiple Instance 158
- 10.17 )MCR End MCR 166
- 11.1 Shift Instructions 169
- Formate 170
- Examples 170
- 11.2 Rotate Instructions 182
- 12 Timer Instructions 189
- Area in Memory 190
- Time Value 190
- Time Base 191
- Bit Configuration in ACCU 1 191
- Choosing the right Timer 192
- Timer Instructions 194
- 12.6 R Reset Timer 199
- 12.7 SP Pulse Timer 200
- Timer Instructions 201
- 12.9 SD On-Delay Timer 204
- 12.11 SF Off-Delay Timer 208
- 13 Word Logic Instructions 211
- 13.3 OW OR Word (16-Bit) 214
- Word Logic Instructions 224
- 14 Accumulator Instructions 225
- Accumulator Instructions 236
- Mnemonics (SIMATIC) 239
- Mnemonics (International) 245
- B Programming Examples 251
- PEB1PEB2 254
- Statement List 256
- Clock Pulse Generator 257
- Signal Check 257
- Programming Examples 261
- Solving a Math Problem 262
- Heating an Oven 263
- Programming Examples 264
- Parameter Transfer 266
- Index-6 272
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