5756B
31
above. In this case, the parameters for the Interrupt mode
are transferred to the PLC. The following parameters are
preset and cannot be modified:
Use these settings to specify that the INTERBUS is
running synchronously with the PLC, controlled by
process alarms which trigger OB 40 as an Alarm OB via
Interrupt Line 1 on the backplane bus.
For further information on data record and bus mode
settings, please refer to the
IBS S7 300 DSC SWD UM E Driver Manual
(Order No. 27 43 25 5) or the online help for IBS CMD
software.
8. Configure the INTERBUS devices. You can select either
automatic or manual configuration of the INTERBUS
devices of your project:
–
IBS CMD reads in the connected bus structure,
creates the complete configuration automatically,
and addresses all the INTERBUS devices.
–
You generate the configuration yourself and allocate
the addresses allowing for any existing software
standards.
– Function:
Process Alarm
– Interrupt Line to CPU:
1
– Alarm OB:
OB 40
Advantage:
Highly simplified INTERBUS configuration,
requiring little system knowledge.
Disadvantage: All the INTERBUS devices must be fully
installed and powered up.
Incorrectly connected devices (e.g.,
devices whose connection cable is not
plugged in) will not be included.
Automatic addressing means that in the
event of later extensions to the plant (e.g.,
the addition of a new device) all the
following addresses in the application
program will change.
Advantage: You can optimize the system to meet your
specifications or the structure of your PLC
program. You can also reserve free
addresses in the used PLC I/O areas for
later expansion of the system.