Criteria

Point is updated

On Change (Default)

Data Collected

At a regular interval.

The interval equals the base scan rate for the port on which the device is located multiplied by the scan rate for the point.

Value Updated

Only when the value changes.

This is an efficient criterion.

On Scan

Data Collected

At a regular interval.

The interval equals the base scan rate for the port on which the device is located multiplied by the scan rate for the point.

Value Updated

The point's value is updated at the point's scan interval, whether or not the value changes.

Because this can increase system load, it is recommended that you use On Scan sparingly or not at all.

On Demand On Scan

Data Collected

Whenever the point's value is needed by an application.

Value Updated

At the point's scan interval, whether or not the value changes.

On Demand On Change

Data Collected

Whenever the point's value is needed by an application.

Value Updated

Only when the value changes.

Unsolicited

Value Updated

Whenever the device communications receives data from the PLC, it immediately sends it to CIMPLICITY Point Management whether or not the point's value has changed.

This mode is only valid if the device is capable of sending unsolicited updates of point values and the device communications protocol. See the CIMPLICITY Device Communication documentation for your particular device and protocol to see if it supports unsolicited communications.

Unsolicited On Change

Value Updated

Whenever the device communications receives data from the PLC, it evaluates the point and sends it to CIMPLICITY Point Management only it the point's value has changed.

This mode is only valid if the device is capable of sending unsolicited updates of point values and the device communications protocol supports it. See the CIMPLICITY Device Communication documentation for your particular device and protocol to see if it supports unsolicited communications.

Poll Once

Data Collected

Polled once when the device communications enabler starts up.

Thereafter, it may be updated by unsolicited data from the device. If you select Poll After Set, it will also be updated after a user performs a Setpoint on the point.

Step 3.1. Enter device point basic device properties.