Setup
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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Master is no longer active.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 3.10
–
Modbus parameters
The Modbus Node Number will need to be configured in the parameters above to allow a
Modbus Master to access the ControlNet Router as a Modbus Slave device.
3.6.3.1.
INTERNAL DATA SPACE MAPPING
When the module is operating as a Modbus TCP Slave, the data from the Modbus Registers
(used to exchange data with the Modbus TCP Master) can be mapped to the ControlNet
interface using the Internal Map. The Internal Map configuration window is opened by either
double clicking on the module in the tree or right-clicking the module and selecting
Configuration
and selecting the
Internal Map
tab.
A.
IDS COPY
–
MODBUS SOURCE
When copying Modbus data to the ControlNet interface, the source type needs to be MB
Register.