Extended control panel functions

The system enables service functions 50 through 70 when you select manual mode and enter function 25 (service switch 1), then function 26 (service switch 2). You use subfunctions with Functions 51 and 57 through 64.

Notes:

When a function has no data to display, FF is shown.
Some upper functions, 50 through 70, are not supported using the remote control panel and virtual control panel, depending on connectivity.
Non-supported functions for the remote control panel and virtual control panel display FF.

To enable functions 50 through 70:

Select function 25 and press Enter. The display reads 25 00.
Use the Increment button to select function 26 and press Enter. The display briefly reads 26 00. Then it typically displays 01 B when the upper functions have activated.

Functions 50 through 70 are now available.

You can disable the service functions by selecting and entering either function 25 (service switch 1) or function 26 (service switch 2).

To disable functions 50 through 70, select function 25 and press Enter. Functions 50 through 70 are then no longer available.

Using Subfunctions

To work with subfunctions, do the following:

Use the Increment or Decrement button to select the appropriate function and press Enter. The function number appears with asterisks (**); for example, 57**. The two asterisks indicate that subfunctions are available.
Press the Increment button. The first subfunction number appears; for example, 5700.
As the subfunction number is displayed, press Enter. The system displays data associated with the subfunction number.
Press the Increment button. The next subfunction number appears; for example, 5701.
As the subfunction number is displayed, press Enter. The system displays the data associated with the new subfunction number.
Repeat these steps to gather all the data that is associated with the subfunction.
Use the Increment or Decrement button to return to the function display with asterisks; for example 57**.
Press Enter to exit the subfunctions.

Function 50-System Processor Stop

This function stops the system processor.

Attention: This function might cause the system to end abnormally. Use only when directed by your next level of support.

Function 51-System Processor Status

This function displays the following values:

Next instruction address (NIA)
Current task dispatching element (TDE) address

The data can be displayed 8 digits at a time. Select and enter a subfunction number to display each word of data from 00 to 0F.

The following table is an example of a subfunction data display that shows NIA and TDE information.

Subfunction data display example

Function	Subfunction	Data Display
51	**	Subfunction mode entered
51	00, 01	NIA (8 bytes)
51	02, 03	Current TDE (8 bytes)

Function 52-System Processor Start

This function starts the system processor (after it has stopped).

Function 53- Repeat GARD

This function displays the following values:

Clear memory, processor, L3 repeat GARD
Enable memory, processor, L3 repeat GARD
Disable memory, processor, L3 repeat GARD
View enable/disable status

This function permanently de-configures an intermittently failing processor, during the IPL following the failure. This is performed in case the IPL diagnostics cannot detect the failure and automatically de-configure it. The failing processor must be replaced or the Repeat GARD function must be cleared before that processor can be used again.

Attention: This function can cause a good processor to be permanently de-configured following a power failure. Use only when directed by your next level of support.

The following table is an example of a subfunction data display that shows Repeat GARD information.

Subfunction data display example

Function	Subfunction	Data Display
53	**	Subfunction mode entered
53	00	Clear memory, processor, L3 repeat GARD
53	01	Enable memory, processor, L3 Repeat GARD
53	02	Disable memory, processor, L3 Repeat GARD
53	03	View enable/disable status (E=Enabled, D=Disabled)