Siemens SIMATIC S7-200 System Manual page 549

USS4_DRV_CTRL instruction, 335
USS4_INIT instruction, 334
USS4_RPM_x instruction, 338, 339
USS4_WPM_x instruction, 338, 339
V
V memory, 28
assigning addresses, 62
copying to permanent memory, 39
saving to EEPROM, 39
Variable memory area (V), 28
Variables
monitoring, 63
monitoring with status chart, 247
PID loop, 150
symbolic addressing, 62
Viewing, errors, 60
W
Watchdog reset instruction, 167
example, 168
Wiring, 20, 21
Wiring diagrams
CPU inputs and outputs, 401
CPU modules, 401–403
discrete expansion modules, 408–410
EM 253 Position Module, 456–457
Wizards
AS--i, 463
Ethernet, 459
Instruction, HSC, 119
Instruction, NETR, NETW, 81
Internet, 462
Modem Expansion, 230, 314
PID, 145
Position Control, 267
Text Display, 6
Word access, 27
Word consistency, PROFIBUS, 443
Work zone location, EM 253 Position Module, 306
Index
535