Common Port Configuration

Overview

The following attributes are common to all types of ports used in ACM. 

General Tab

See the General Object Configuration page.

Options Tab

Connections Setting

This property assigns a Connection Settings object to the port object.

Footprint Level

Options:

• None. (Default)
• Entry and Exit: This logs the server basic function entry and exit. This allows ACM to trace back to a certain location inside the code to see where the problem might be.
• Entry, Exit, and Parameters: This logs the server basic function entry and exit, as well as the parameters values passed in and passed out of these functions.

Interrupt Threshold

The priority level that will interrupt the poll in progress.  Tasks with a higher priority than that selected will interrupt the poll in progress for this port.

Options:

• Low (Default): Queue up with other Low priority items.
• Medium: Interrupts Low priority items, and queues up with other Medium priority items.
• High: Interrupts Medium and Low priority items, and queues up with other High priority items.

High Task Promotion

This is designed to prevent high priority tasks from indefinitely blocking lower priority tasks. Use this field to specify a maximum number of high priority tasks that will run before allowing a lower priority task to have a turn. For example, if this is set 5 and there are 7 high priority tasks and 1 medium task in the queue, 5 of the 7 high priority tasks would run, and then the medium priority task would get its turn. Then the remaining 2 high priority tasks would run. A value of zero in this field disables task promotion resulting in all tasks running strictly in their priority order.

Medium Task Promotion

This is designed to prevent medium priority tasks from indefinitely blocking lower priority tasks. Use this field to specify a maximum number of medium priority tasks that will run before allowing a lower priority task to have a turn. For example, if this is set to 5 and there are 7 medium priority tasks and 1 low task in the queue, 5 of the 7 medium priority tasks would run, and then the low priority task would get its turn. Then the remaining 2 medium priority tasks would run. A value of zero in this field disables task promotion resulting in all tasks running strictly in their priority order.

Quiet Delay

The time between closing the connections and re-opening (in milliseconds).

Transmit Delay

The delay period before transmitting each message (in milliseconds).

Logging

Logging options:

• Errors. (Default = Selected) Any errors occurring with communications or with unexpected results.
• Send messages. (Default = Selected) Every message sent to a device to request data will be logged.
• Receive messages. (Default = Selected) Every message sent to a port to provide data will be logged.
• Device and item activity. When items or devices are removed, added, activated or deactivated, an appropriate log is generated.
• Communication status changes. A message will be logged whenever communication status changes from bad to good or vice-versa.
• Data values written by clients. When data is written to an item, it will be logged in logical units.
• Data values sent to clients. When data is received from the device, it will be logged in logical units.
• Configuration changes. A message will be logged when any change to the current configuration is made.
• Port usage
• User actions
• Receive buffer changes
• Thread events
• Trace interaction with protocol
• Suppress write entries