2
SYSTEM CONFIGURATION
2.1 System Configuration
2
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1
OV
ER
VIE
W
2
SYS
TEM
CONFIGURA
TI
ON
3
TR
AC
KI
N
G
C
ABL
E
4
P
R
OCE
DURE
FO
R
S
TAR
TING
UP
A
RE
DUN
DAN
T
S
Y
S
T
E
M
5
RE
DUNDA
NT S
Y
S
T
E
M
FUNCTIONS
6
RE
DUN
DAN
T
S
Y
S
T
E
M
NE
TW
O
R
K
S
7
PR
OG
R
A
MM
IN
G
CA
UTIO
N
S
8
TR
O
U
BLE
S
HOOTING
(6) Communications through the PROFIBUS-DP
(a) I/O data exchange
The PROFIBUS-DP master module exchanges I/O data with slave stations
connected to the PROFIBUS-DP.
(b) Communication method and operation at system switching of the
PROFIBUS-DP
For the method of communications with slave stations connected to the
PROFIBUS-DP and operation overview at system switching, refer to
Section 6.2.6.
For the method of communications with slave stations connected to the
PROFIBUS-DP and operation details at system switching, refer to the following
manual.
PROFIBUS-DP Master Module User's Manual
Diagram 2.8 Connection of Redundant System to PROFIBUS-DP
Tracking cable
DP-Slave
PROFIBUS-DP
DP-Slave
DP-Slave
DP-Slave
System A - Control System
System B - Standby System
Power supply module
Control Master
Standby Master
QnPRHCPU
QJ71LP21
QJ61BT1
1
N
QJ71E71
QJ71PB92V
Power supply module
QnPRHCPU
QJ71LP21
QJ61BT1
1
N
QJ71E71
QJ71PB92V