Omron Host Link Driver Tag Type Properties: Serial Tab
The Serial tab for the Omron Host Link driver tag properties folder consists of attributes used to identify and establish a connection the serial port tag that the Omron Host Link driver should use to transmit data to the I/O device. The Serial tab is also used to select the communication protocol to be used in transmissions of data between the I/O device and the driver.
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Enables you to select the serial port tag or TCP/IP tag you wish to be associated with this driver tag. A serial port tag opens a serial port to enable communications between VTS and your PLC or RTU. A TCP/IP tag enables you to connect to a series of hosts, allowing you to transmit data across a network or over the Internet.
The Port field can be cleared using the X button that appears to its right.
The Time-Out Limit field indicates the receiver time-out limit (i.e. the time in seconds or fractions of a second that this driver should wait for a reply from the PLC or RTU).
The Hold checkbox indicates whether this driver should hold data from the PLC or RTU in the event of a communications failure.
If the Hold checkbox is selected, the last received value from the PLC or RTU will be held.
If the Hold checkbox is not selected, the data will be invalidated in the event of a communications error.
By default, the Hold checkbox is not selected.
The Point To Point checkbox enables you to indicate the protocol to be used by the Omron Host Link driver in communications with the PLC.
If the Point To Point checkbox is selected, the driver will use point-to-point protocol (PPP) to communicate with the PLC.
If the Point To Point checkbox is not selected, the driver will use multi-drop protocol.
By default, the Point To Point checkbox is not selected.
The Station field enables you to indicate the PLC station address.
The Retries spin box enables you to select the number of attempts that will be made by this driver if there is no reply to a message. An error will be declared after this number has been reached.