Data Flow RTU Driver Tag Type Properties: I/O Tab
The I/O tab for a Data Flow RTU driver tag provides properties that can be used to establish a connection between this tag and the physical Data Flow RTU.
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In order to connect to this port with VTS, you can use one of several different hardware solutions:
• Serial port cable connected directly.
For this case, configure and select a serial port tag.
• Stand alone serial modem connected to the serial port on the radio.
VTS has its own modem that is used to dial up the modem connected to the unit. For this option, configure and select a serial port that is using a modem.
• Ethernet terminal server connected to the serial port on the unit.
VTS is connected to the same network as the terminal server and can connect to it with either a TCP/IP or UDP/IP port tag
Any type of VTS port tag may be used, but it must match the hardware connection to the unit.
Enables you to set the amount of time (in seconds or in fractions of a second) between polls of the physical Data Flow RTU.
Note: If the Active checkbox is not selected, the associated Data Flow RTU will not be polled, regardless of the interval assigned in the Poll Interval (Sec) field.
Allows you to specify whether the designated poll interval is active or idle.
If the Active checkbox is selected, the associated Data Flow RTU will be polled according to the interval assigned in the Poll Interval field.
If the Active checkbox is not selected, the associated Data Flow RTU will not be polled, regardless of the interval assigned in the Poll Interval field.
The active status can also be toggled by the operator if the tag is drawn as a Comm Status indicator. Right-clicking on that drawing method will open a menu with which the operator can change the active status
Enables you to set the amount of time (in seconds or in fractions of a second) that VTScada will wait when an attempt to poll the Data Flow RTU has been made.
If no communication is made, the system will attempt to poll the station again, according to the setting in the Retries spin box. If the system is unable to poll the Data Flow RTU, the next RTU in sequence will be polled.
The Retries spin box enables you to select a number indicating the amount of times that VTScada will attempt to poll an unresponsive Data Flow RTU, after which the system will move on to the next Data Flow RTU in the polling sequence.
Allows you to enter a number indicating the amount of time, measured in hours that the system should wait before doing a full refresh of data values from the Data Flow RTU.
Enables you to specify whether or not data should be held in the event of a communications error with the Data Flow RTU.
If the Hold Values on Error checkbox is selected, the last received value from the Data Flow RTU will be retained otherwise, the data will be invalidated on error.
Select this box to specify whether or not the Data Flow RTU represented by this tag belongs to a poll group (if group polling is supported by the radio interface module).