CIMPLICITY supports limits for both device and virtual analog points:

	Limits tab display.
	Range limits configuration.
	Setpoint limits configuration.

Limits tab display

1. Click Advanced on the General tab of the Point Properties dialog box.

2. Select the Limits tab that displays if you are configuring an analog point.

Range Limits configuration

Values below a low range limit and above a high range limit will display as an unavailable point value.

Range limits:

Apply to only the first element of an array point.

Can be very useful if you want to exclude meaningless data from CIMPLICITY functions.

Enter the low and high limits in the Range limits box for the converted value of the point.

Example

A PLC gives raw data in counts from 0 to 1000.

The raw data represents temperatures between -500 °C and 500 °C.

Values above 200 °C or below -200 °C are considered to be out of range.

The point's value displays as follows.

Point value	Value that displays
Below -200 °C	Unavailable
Above 200°C	Unavailable
Between -200 °C and +200 °C	Current

Guidelines for Unavailable Range Values during Runtime

When the project is running, values exceeding the range limits are handled as follows:

If the range limit is exceeded:
During runtime		The point value on CimView screens displays the default text until the point comes back within raw limits. Point Control Panel displays asterisks (******) for the point value until the point comes back within raw limits.
At startup		The point value on CimView screens displays the default text until the point comes back within raw limits. Point Control Panel displays asterisks (******) for the point value until the point comes back within raw limits.
If the RAW_LIMIT_ALARM global parameter is set to:
YES	An alarm is generated when a point's value first exceeds its range limits. When the point value returns to within its range limits, the Alarm State will be set to Normal.
NO	No alarm will be generated.

Setpoint limits configuration

Setpoint entries during runtime must be within the limits entered in the Setpoint limits box.

If a user enters a value below the low setpoint limit or above the high setpoint limit, the value will not be accepted.

Enter the Low and High limits in the Setpoint limits box.

 Important: The setpoint limits must be within the range limits.

More information

Device and virt'ual point configuration.

---