It might happen that a production sequence cannot run completely automatically. For example, it might be necessary for the operator to make a manual operation or acknowledge an action. The automated sequence is to be continued only when the operator has done the work or acknowledged the operator request.
The following table describes how you configure an operator request in an SFC type. The operator request is displayed as follows during Runtime:
- As note text in the picture block of the SFC type instance.
- As a message in the WinCC Alarm Control.
- As a group display in the process picture, overview area and navigation window.
||Display note text in the picture block of the SFC type instance|
The SFC type provides "Note texts" as a characteristic. You can use the Note texts characteristic to define different texts in an SFC type. Each note text is assigned a unique number, a name and a comment. Only one note text can be active at any one time. In order to activate a note text in a specific step, you must set the "OPTIPNO" signal to the value of the desired note text.
The active note text is then displayed in the picture block of the SFC type instance. If you assign a comment to a note text, then the comment is displayed as a note text, otherwise the name is displayed as a note text.
On the right of the note text is a button for acknowledging. If the operator acknowledges the note text with this button, the "OPTIPNO" signal is reset to the value "0". This information can be used as a stepping condition in a transition of the SFC type. The following figure shows the configuration of a transition. The transition steps to the next step if the operator request has been acknowledged.
- The "OPTIPNO" signal is an output signal of the SFC block. The "OPTIPNO" signal can also be reset by direct assignment of the value "0" when processing a step. Acknowledgment of the note text does not necessarily have to be in the picture block of the SFC type instance.
- Make sure that you configure the note texts in the language that is also to be displayed at Runtime. Language switchover for note texts is not supported.
||Display a message in the WinCC Alarm Control|
An SFC type instance consists of an ALARM_8P block (SFB 35) for configuring messages that require acknowledgement and two NOTIFY_8P blocks (SFB 31) for configuring messages that do not require acknowledgement. Some messages of these blocks are already used by the system. You can fuse up to 7 messages that require acknowledgement on the ALARM_8P block and 5 messages that do not require acknowledgement on the second NOTIFY_8P block. In order to trigger a message in a specific step of the sequencer, you can set a message-triggering signal in a step. An external interconnection of the message-triggering signal in the CFC is not necessary. Below is a list of the available message signals of the message blocks:
The following figure shows the configuration of a message that does not require acknowledgement where the "NSIG_16" signal is used.
When the step is left, the message-triggering signal "NSIG_16" is reset.
You must configure the additional message of the SFC type. For this you select the menu command "SFC > Message..." in the SFC editor. The "PCS7 Message Configuration" dialog opens. Here you can define the message properties (Message class, Event, ...). The following figure shows the configuration of the "NSIG_16" message that does not require acknowledgement.
The message can only be displayed during WinCC Runtime in the WinCC Alarm Control or in the Batch Control Center in the Message Window. The following figure shows the message display in the Batch Control Center.
||Display a group display in the process picture, overview area and navigator window|
The presence of an operator request can only be displayed during WinCC Runtime by a group display in the process picture, navigation window and in the overview area. During OS compilation the "Create/Update Block Icons..." function for the instance of the SFC type incorporates a block icon for the SFC in the process picture and interconnects it. The block icon for the SFC type contains a group display. For the information of the group display to be transferred to the overview area at Runtime, the property "CollectValue" must be connected directly with the "*.EventState" variable (dynamized) and the property "Relevant" must have the static value "Yes". This work is done by the "Create/Update Block Icons..." function. The process picture with the block icon for the SFC type instance must be incorporated in the Picture Tree Manager. The following picture shows an operator request of an SFC type instance at WinCC Runtime.
Notes on the configuration of the group display are available:
- In the WinCC Information System under "Options > Options for Process Control > Process Control Runtime > Group Display".
- In the Help for PCS 7 under "PCS 7 - Configuration Manual Operator Station > Creating Process Images - Basics > Configuring a group display".
- In Entry ID 493670.