Setup
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Parameter
Description
Local Node
The Modbus Node address assigned to the ControlNet Router.
Modbus TCP Port
The TCP port to be used for the Modbus communication. By default the module
will use the standard TCP port 502.
Update Rate
The period (in milliseconds) between master requests to the target Modbus
device.
(Modbus TCP Master mode only)
Retry Limit
The number of successive Modbus request retries before the request is set to
have failed.
(Modbus TCP Master mode only)
Response Timeout
The time (in milliseconds) the module will wait for a valid Modbus response.
(Modbus TCP Master mode only)
Inactivity Timeout
The amount of time during which no Modbus requests have been received
before the ControlNet Router indicates that the connection to the Modbus
Master is no longer active.
(Modbus TCP Slave mode only)
Base Offset Type
Modbus (Base 0)
Conventional Modbus addressing where the first address is 0.
PLC (Base 1)
PLC addressing, where the first address is 1.
Table 3.11
–
Modbus parameters
3.6.4.1.
MODBUS AUXILIARY MAP
The Modbus Auxiliary Map configuration is shown in the figure below. The Modbus
configuration is only applicable when the module has a Modbus Master operating interface.
Up to 100 mapping items can be configured while communicating to up to 20 Modbus Slave
devices.
The Modbus Aux Map will be executed in a sequential manner and a mapped item will be
executed at the
Update Rate
in the Modbus parameters. That is, the
Update Rate
is the time
between two successive mapped item executions.
The Modbus Auxiliary Map configuration window is opened by either double clicking on the
module in the tree or right-clicking the module and selecting
Configuration
.