GPIO Chip Tag

Help Contents

Introduction

The GPIO Chip Tag Microchip Icon interfaces to a GPIO Chip on a Linux Operating System.

The tags associated with the GPIO Chip Tag can be read:

Configuration Properties

The GPIO Chip Tag supports the configuration properties of the Alarm Tag plus these properties:

Property Type Version Description
ReadInterval TIME 3.95 The interval between each read. An interval value of zero (T#0s) disables periodic query execution. See Interval and Offset for information on how timed activities are scheduled.
ReadOffset TIME 3.95 The offset added to the Interval to get the actual read time. See Interval and Offset for information on how timed activities are scheduled.
ChipName WSTRING 3.95 The device name of the chip.

Data Properties

The GPIO Chip Tag supports the data properties of the Channel Tag plus these properties:

Property Type Description
ReadTimer TimerStatus The status of the read timer.

Tag Commands

The GPIO Chip Tag supports the tag commands of the Alarm Tag plus these tag commands:

Tag Command Version Description
Refresh 3.95 Requests an immediate read of the tags associated with this GPIO Chip Tag.

Note: Event triggered data reads (from the Refresh Tag Command) and periodic data reads (defined by the ScanInterval property) are independent. You can use the Refresh Tag Command, or the ScanInterval property, or both to determine when the tags are read.

Relationships to Other Tag Types

The GPIO Chip Tag builds on the features of these tag types:

Further Information

Interval and Offset

To learn how activities are scheduled using Interval and Offset.

I/O Digital Data Point Tag

To learn about the I/O Digital Data Point Tag that can be associated with the SNMP Client Tag.

SNMP Client Driver

For an overview of the SNMP Client Driver.

Alarm Conditions

To learn about abnormal conditions in SCADA applications.

Glossary

For the meaning of terms used in Fernhill SCADA.