Siemens SIMATIC S7-200 System Manual page 529

Symbols
&, 34
*, 34
A
AC installation guidelines, 21
AC outputs and relays, 22
ACCEL_TIME (Acceleration Time), EM 253 Position
Module, 256
Access restriction, 48
Accessing
direct addressing, 27
S7--200 data, 27, 34
status chart, 63
Accumulators, 30
Add instruction, 140
Add to table instruction, 189
example, 189
Address
assigning, 62
Modbus, 350
network, 211
setting remote, 213
symbolic, 62
Address switches, EM 277 PROFIBUS--DP, 439
Addressing
accumulators, 30
analog inputs, 31
analog outputs, 32
bit memory, 28
byte:bit, 27
counter memory, 29
direct, 27
expansion I/O, 33
high--speed counters, 30
indirect (pointers), 34
local I/O, 33
local memory, 31
memory areas, 28–31
process--image input register, 28
process--image output register, 28
S7--200 memory, 27
sequence control relay (SCR) memory, 32
special memory (SM) bits, 31
timer memory, 29
variable memory, 28
AENO instruction, 75
Agency approvals, 392
AI. See Analog input (AI)
Alarm checking, PID loop, 151
Allocating memory, Data Log Wizard, 377
American Bureau of Shipping (ABS) Maritime
Agency, 393
Analog adjustment
potentiometers, 50
SMB28 and SMB29, 486
Analog input (AI)
addressing, 31
filtering, 45
Analog modules, 4
EM 231 analog input, 417
EM 231 RTD, 424
EM 231 thermocouple, 424
EM 232 analog output, 421
EM 235 analog input/output, 418
Analog output (AQ), addressing, 32
Analog outputs, configuring values, 43
AND instruction, 162
example, 163
AND load instruction, 75
AQ. See Analog output (AQ)
AS--i Wizard, 463
AS--interface modules, order numbers for manuals,
496
ASCII conversion instructions, 103
ASCII to hex instruction, 103
example, 106
Assigning
addresses, 62
initial values, 62
interrupts to HSC, 126
network addresses, 211
Asynchronous updates, PWM instruction, 136
Attach interrupt instruction, 153
Auto--hysteresis, 385
Auto--Tune, PID, 382
Automatic mode, PID loop, 151
Avoiding, network conflicts, 236
B
Backlash, selecting work zone, 306
Battery cartridge, 465
order number, 496
Baud rates
network, 221
optimal, 233
setting, 211
switch selections
Multi--Master cable, 9
PPI Multi--Master cable, 213, 225, 227, 231,
232
BCD to integer instruction, 100
Biasing
network cable, 223
PID loop, 145, 147
Bit logic instructions
coil instructions, 73
contact instructions, 70
logic stack instructions, 75
reset dominant bistable, 77
set/reset bistable, 77
Bit memory area (M), 28
saving on power loss, 39
Block diagram, EM 241 modem, 450
Block move byte instruction, 166
Block move double word instruction, 166
Block move instructions, example, 166
Block move word instruction, 166
Bookmarks, 244
Index
515