Siemens SIMATIC S7-200 System Manual page 536

S7-200 Programmable Controller System Manual
Filtering
analog inputs, 45
digital inputs, 44
Find first character within string instruction, 187
Find instruction, 193
Find string within string instruction, 187
First--in--first--out instruction, 190
example, 190
Floating point values, 32, 149
For--next loop instructions
example, 170
for, 169
next, 169
Forcing values, 247, 248
Forward--acting loops, 150
Freeport, configuring, PPI Multi--Master cable, 231
Freeport communication, 483
SMB30 and SMB130, 486
Freeport control registers (SMB30 and SMB130),
486
Freeport mode
changing from PPI, 87
character interrupt control, 92
definition, 156
enabling, 86
example, 226
parity error (SMB3), 483
receive character (SMB2), 483
RS--232 standard, 227
transmit and receive instructions, 86
user--defined protocols, 226
Function Block Diagram. See FBD editor
Functions, Modbus, 351, 352
G
Gap update factor (GUF), 233
Germanisher Lloyd (GL) Maritime Agency, 393
Get port address instruction, 95
Global variable table, 62
Grounding, 20, 21
GSD file, EM 277 PROFIBUS--DP, 446–447
Guidelines
designing a Micro PLC system, 52
grounding and circuit, 20
grounding and wiring, 21
high--vibration environment, 19
Inductive loads, 22
installation, 16
instructions for EM 253 Position Module, 273
interrupt routines, 54, 155
lamp loads, 22
modifying pointers for indirect addressing, 35
network configuration, 221
subroutines, 54
suppression circuits, 22
vertical installation, 19
wiring, 20
522
H
Handling
complex communications, 236
errors, 60
Hardware, troubleshooting, 249
Hex to ASCII instruction, 103
High potential isolation test, 394
High--speed counter (HSC) instruction, 118
example, 132
High--speed counter definition (HDEF) instruction,
118
High--speed counters, 50
assigning interrupts, 126
changing current value, 131
changing direction, 130
changing preset value, 131
control byte, 119
defining modes and inputs, 120
disabling, 131
initialization sequence, 127
interrupts, 120
memory area, addressing, 30
modes, 121, 508
programming, 119
reset and start operations, 123
selecting active state, 124
setting control byte, 124
setting current and preset values, 126
SMB36--SMB65, 487
status byte, 126
timing diagrams, 121–123
understanding, 119
High--speed pulse output
operation, 133
SMB66--SMB85, 489
High--speed pulse outputs, 50
Highest station address (HSA), 233
History log , CPU events, 47
HMI devices, 225
Holding Registers, MBUS_MSG, 358
HSC, 50
Instruction wizard, 119
HSC0, HSC1, HSC2 register (SMB36 to SMB65),
487
HSC3, HSC4, HSC5 register (SMB131 to SMB165),
491
Human Machine Interfaces, order number, 497
HyperTerminal, configuring RS--232/PPI
Multi--Master cable, 239–483
I
I memory, 28
I/O, reading and writing, 41
I/O addressing, 33
I/O errors, 60
I/O expansion cable, installation, 466