15-7
Manual OP5, OP15
( ) J31069-D0840-U001-A2-7618
15.5 Loop-Through Mode (OP15 only)
The IF1 interface of the OP15 is optionally available for the loop-through
mode of a configuration computer or another OP. This means that
the PLC can be accessed during operation
a second OP can be connected to a PLC at a reasonable price
Figure 15-5 provides an overview of the connections in AS511 loop-through
mode. Standard cables are available for the connections shown in the figure
(refer to the ST80.1 catalog).
TTY passive
OP5
OP15
IF1
COM1
(25 pin)
V.24
PU 7xx
Operator Panel
TD/OP with
AS511 protocol
OP15
TTY passive
TTY passive
IF2
PLC
V.24
Figure 15-5 Connnection Configuration Scheme for AS511 Loop-Through Mode
Print functions of the looped-through OP cannot be used.
The OP does not perform life-bit monitoring, i.e. it cannot detect whether
the PLC is in Stop mode, for example. (Life-bit monitoring continues to
be performed on the PLC.)
System performance may deteriorate due to higher loading of the inter-
face to the PLC.
IF1 interface of
OP15 for loop-
through mode
Constraints in
loop-through
mode
Electrical Installation
To Next Page
Loading...
