Siemens SIMATIC S7-200 System Manual page 537

I/O interrupt queue, 157
I/O interrupts, 156
I/O module identification and error register, 485
I/O status (SMB5), 484
Idle line detection, 89
IEC 1131--3 instruction set, 57
IEC counter instructions
down counter, 116
example, 116
up counter, 116
up/down counter, 116
IEC timer instructions, 201
example, 201
Immediate contact instruction, 70
Increase program memory, disable run mode edit, 47
Increment instruction, 144
example, 144
Incrementing pointers, 35
Indirect addressing, 34
& and *, 34
modifying pointers, 35
Inductive Loads, 22
Initial values, assigning, 62
Initializing
high--speed counters, 127
Modbus Protocol, 349
Input block diagram
EM 231, 419
EM 235, 420
Input data word format
EM 231, 419
EM 235, 419
Input image register, 25
Input simulators, 471
Input specifications
analog expansion module, 412
CPU modules, 398
discrete expansion module, 406
Inputs, 24, 25
calibration, 416
conditional/unconditional, 59
CPU module, 401
discrete expansion module, 406
EM 253 Position Module, 265
filtering analog, 45
filtering digital, 44
high--speed counters, 120
start and reset (HSC), 123
Installation
clearance requirements, 16
CPU module, 18
electrical noise, 16
EM 231, 422
EM 235, 422
expansion module, 18
guidelines, 16
heat--generating devices, 16
high voltage devices, 16
I/O expansion cable, 466
mounting requirements, 18
power supply, 17
S7--200, 17
STEP 7--Micro/WIN, 5
Instruction, entering, 12
Instruction error codes, EM 253 Position Module,
292
Instruction Libraries, 64
Instruction sets
IEC 1131--3, 57
selecting, 57
SIMATIC, 57
Instruction tree, 11, 55
Instruction Wizard
HSC, 119
NETR, NETW, 81
Instructions
add, 140
add to table, 189
AENO, 75
AND, 162
AND load, 75
ASCII to hex, 103
attach interrupt, 153
BCD to integer, 100
bit logic, 70
block move byte, 166
block move double word, 166
block move word, 166
byte to integer, 100
call subroutine, 204
clear interrupt event, 153
compare, 59
concatenate string, 184
conditional end, 167
conditional return from interrupt, 153
conditional return from subroutine, 204
conditional sequence control relay end, 172
convert double integer to string, 107, 110
convert integer to string, 107, 110
convert real to string, 107, 110
convert substring to double integer, 107, 110
convert substring to integer, 107, 110
convert substring to real, 107, 110
copy string, 184
copy substring from string, 186
cosine, 143
count down counter, 113
count up counter, 113
count up/down counter, 114
creating motion, 302
decode, 112
decrement, 144
detach interrupt, 153
disable interrupt, 153
divide, 140
divide integer with remainder (DIV), 142
double integer to ASCII, 104
double integer to integer, 100
double integer to real, 100
down counter, 116
EM 241 Modem module, 318
EM 253 Position Module, 273
enable interrupt, 153
encode, 112
End, 167
exclusive OR, 162
Index
523