Siemens Simatic S7-200 System Manual page 465

Real--time clock instructions, 73
Receive instruction, 79
break detection, 83
end character detection, 84
end conditions, 82
example, 86
Freeport mode, 79
idle line detection, 82
intercharacter timer, 84
maximum character count, 85
message timer, 84
parity errors, 85
receiving data, 80
SMB86 to SMB94, SMB186 to SMB194, 416
start character detection, 82
start conditions, 82
user termination, 85
Receiving data, 85
Recovering, lost password, 45
Reference point (RP), 250
RP seek
RP_APPR_DIR, 250
RP_FAST, 250
RP_SEEK_DIR, 250
RP_SLOW, 250
seek direction, 250
RP seek sequence, modes, 251
RP_OFFSET, 251
Reinstalling, terminal block connector, 17
Relays, 20
service life, 338
Remote address, setting for S7--200, 210
Removing
CPU module, 17
expansion module, 17
memory cartridge, 36
terminal block connector, 17
Repeaters
network, 218
order numbers, 422
Requirements, Modbus Slave Protocol, 330
Reset, high--speed counter, 116
Reset dominant bistable instruction, 72
Reset immediate instruction, 68
Reset instruction, 68
example, 68
Resolution, timer, 197, 198
Restarting, after fatal error, 57
Restoring
data from EEPROM, 35
program from memory cartridge, 37
Retentive bit memory, 35
Retentive memory, 41
Retentive on--delay timer instruction (TONR), 196
example, 200
Return from interrupt instruction, 155
Return from subroutine instruction, 203
example, 205
Reverse--acting loops, 150
RJ11 jack, EM 241 Modem module, 288, 386
Rotate instructions, 179
example, 180
types, 179
Rotate left byte instruction, 179
Rotate left double word instruction, 179
Rotate left word instruction, 179
Rotate right byte instruction, 179
Rotate right double word instruction, 179
Rotate right word instruction, 179
Round instruction, 94
RP Seek mode options, 253–257
EM 253 Position Module, 253–257
RS--232 standard
Freeport mode, 223
PC/PPI cable, 223
RS--485 standard, 219
RTD module (EM 231), 368
RUN mode, 11, 37
editing program, 236
Run--time errors, 57
Run--time programming, error codes, 405
Running, program, 11
S
S memory, 29
S7--200
accessing data, 24
accumulators, 27
addressing, 24
analog inputs (AI), 29
analog outputs (AQ), 29
as slave device, 208, 375
baud rates, 208, 209–211
bit memory area (M), 25
C memory, 26
communications, 208
communications processing, 40
connecting with STEP 7--Micro/WIN, 7
constant values, 30
counter memory area (C), 26
CPU modules, 2
dimensions, 2
downloading, 34
electromagnetic compatibility, 339
environmental conditions, 339
error codes, 404
error handling, 56
executing control logic, 22
expansion modules, 3
grounding guidelines, 19
hardware troubleshooting, 241
high--speed counters, 27
I memory, 25
installation guidelines, 14
installing, 15
interrupt routines, 157
L memory, 28
local memory area (L), 28
M memory, 25
memory, 24
Index
453