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Chapter 4 Configuration with Logicmaster 90–70
presently–unavailable modules. Alternatively, you can could configure the existing
equipment with Auto I/O Map ON, then turn it OFF and edit the length fields to
provide space for the future modules, You need to plan this early; if you don’t leave
enough room for future modules, extensive reconfiguration may be required later on.
equipment with Auto I/O Map ON, then turn it OFF and edit the length fields to
provide space for the future modules, You need to plan this early; if you don’t leave
enough room for future modules, extensive reconfiguration may be required later on.
If some I/O will not be scanned by the central PLC:
I/O data that is assigned to references outside the I/O map will not be exchanged with
the PLC during system operation. Such references would be controlled by an
intelligent module in the Remote Drop, as described in chapter 3. References outside
the I/O map can be located anywhere in the Remote I/O Scanner’s I/O memory.
the PLC during system operation. Such references would be controlled by an
intelligent module in the Remote Drop, as described in chapter 3. References outside
the I/O map can be located anywhere in the Remote I/O Scanner’s I/O memory.
I/O Map
Module Reference Addresses
ÉÉÉÉÉÉ
ÉÉÉÉÉÉ
Outside
I/O Map
I/O Map
b
For this type of application, Auto I/O Map can be turned OFF for part or all of the
Remote Drop configuration:
Remote Drop configuration:
A. You can turn Auto I/O Map OFF before configuring any modules and enter in the
I/O Map lengths for each data type to be exchanged with the PLC. Then, configure
references for individual I/O modules that fall either inside or outside the I/O map,
as needed.
references for individual I/O modules that fall either inside or outside the I/O map,
as needed.
B. Or, you can begin with Auto I/O Map turned ON, and use it to configure all
modules that should be included in the I/O map. When you reach the point where
I/O references should be outside the I/O map, return to the Remote I/O Scanner’s
configuration screen, and turn Auto I/O Map OFF. The rest of the modules you
subsequently configure for this drop will be outside the I/O map.
I/O references should be outside the I/O map, return to the Remote I/O Scanner’s
configuration screen, and turn Auto I/O Map OFF. The rest of the modules you
subsequently configure for this drop will be outside the I/O map.
Bus Scan Time Impact
As data lengths are incremented, either by entering them in the I/O map or with
automatic I/O mapping, the configuration software calculates the total number of
input and output bytes, and the amount of time the quantity of I/O specified will add
to the scan time of the Genius bus, based upon the configured baud rate. This
information is shown on the first Remote I/O Scanner configuration screen (this
information cannot be edited):
automatic I/O mapping, the configuration software calculates the total number of
input and output bytes, and the amount of time the quantity of I/O specified will add
to the scan time of the Genius bus, based upon the configured baud rate. This
information is shown on the first Remote I/O Scanner configuration screen (this
information cannot be edited):
The Bus Scan Impact is the amount of time that will be added to the scan time of the
bus on which the Remote I/O Scanner is located by the quantity of data to be
exchanged with the host.
bus on which the Remote I/O Scanner is located by the quantity of data to be
exchanged with the host.