Control panel functions

Control panel functions

This table lists the codes and descriptions for each of the control panel functions and whether each type of the control panel supports these functions.
There are few functional differences among these control panels. The main difference is that the physical control panel and the remote control panel, when cabled directly to the system, can turn on the system. The virtual control panel and the remote control panel, if connected through a LAN, cannot turn on the system. Notes:

Some control panel functions might not be available on all system types.

The x can be any number 0 through 9, any letter A through F, or a blank.

If you have selected a function, find the selected function in the table and verify that you have completed the correct function.

If you cannot change the Function/Data display or complete the selected function, contact your service provider.

Control panel (32-character) function codes

Function code Remote control panel code Virtual control panel function? Function description

01 01 Yes

Display the currently selected initial program load (IPL) type (and logical key mode on some system types).

Display the currently selected IPL speed override for the next IPL.

02 02 Yes Select the IPL type, logical key mode, and IPL speed.
03 03 Yes Start an IPL to load the system. The IPL uses the selected IPL options.
04 04 Yes Lamp test all displays and indicators are switched on.
05 05 No System power control network (SPCN) system reference code (SRC). Display an SRC on the control panel.
07 Not applicable Not applicable Allow you to perform SPCN service functions.
08 08 Yes Fast turn off. To perform a fast turn off, see Stopping the system in the Basic system operations topic collection.
09 through 10 Not applicable Not applicable Reserved.
11 through 19 11 through 19 Yes System reference code (SRC) displays an SRC on the control panel.
20 20 Yes Display the machine type, model, processor feature code, processor class indicator, and IPL path description.
21 21 Yes Cause the Use Dedicated Service Tool (DST) display to appear on the system console. To exit DST, select the Resume operating system display option.
22 22 Yes Force system main storage dump.
23 Not applicable Not applicable Reserved.
24 Not applicable Not applicable Reserved.
25 25 Yes Use Service switches 1 and 2 to enable or disable functions 50 through 70.
26 26 Yes Use Service switches 1 and 2 to enable or disable functions 50 through 70.
27 through 32 Not applicable Not applicable Reserved.
33 33 Yes Reorder SPCN addressing.
34 34 Yes Retry main storage dump (MSD) IPL.
35 through 49 Not applicable Not applicable Reserved.
50 Not applicable Not applicable System processing unit stop.
51 Not applicable Not applicable System processing unit status displays the following values: B0 register contents, Next Instruction Address (NIA), and current Task Dispatching Element (TDE) contents
52 Not applicable Not applicable System processing unit start.
53 53 No Unconfigure an intermittently failing processor (Repeat GARD function)
54 through 56 Not applicable Not applicable Reserved.
57 Not applicable Not applicable Display area addresses for system data.
58 Not applicable Not applicable Set the first character of the base address for the function 62 display.
59 Not applicable Not applicable Set the second character of the base address for the function 62 display.
60 Not applicable Not applicable Set the third character of base address for function 62 display.
61 Not applicable Not applicable Set the fourth character of base address for function 62 display.
62 Not applicable Not applicable Display service processor storage.
63 Not applicable Not applicable System status SRC trace.
64 Not applicable Not applicable Service processor diagnostic status SRC trace.
65 65 Yes Deactivate remote service.
66 66 Yes Activate remote service.
67 67 Yes Disk unit IOP reset/reload is enabled only by specific disk unit SRCs.
68 68 Yes Concurrent maintenance power domain Power Off.
69 69 Yes Concurrent maintenance power domain Power On.
70 70 No Dump service processor control storage.
Power button Power button in graphical interface -- for powering on and off the system. (LAN-connected remote control panels cannot turn on the system.) Power button in graphical interface -- for powering off the system only.
OFF = Delayed turn off.
ON = Immediate power
on (can be timed
turn on).
Keystick See note. See note. IPL keylock - Manual, Auto, Normal, Secure.
Attention light Graphical attention light Yes Attention state LED.
Power indicator Power indicator in graphical interface Power indicator in graphical interface Lit when power is fully operational.

The remote control panel and virtual control panel recognize the presence of a keystick. If your system uses a keystick, the Mode button works with the same functions as the physical control panel, depending on whether the keystick is inserted. LAN-connected remote control panels need special authority to use the Mode button.

If you cannot find the function code in the previous table, the support for added features or devices might not have been available when this information was produced. Look for any supplemental unit function code information for the function code you displayed on the control panel.

Parent topic:
Control panel concepts

Related concepts

Instructions and descriptions for control panel functions

Function code	Remote control panel code	Virtual control panel function?	Function description
01	01	Yes	Display the currently selected initial program load (IPL) type (and logical key mode on some system types). Display the currently selected IPL speed override for the next IPL.
02	02	Yes	Select the IPL type, logical key mode, and IPL speed.
03	03	Yes	Start an IPL to load the system. The IPL uses the selected IPL options.
04	04	Yes	Lamp test all displays and indicators are switched on.
05	05	No	System power control network (SPCN) system reference code (SRC). Display an SRC on the control panel.
07	Not applicable	Not applicable	Allow you to perform SPCN service functions.
08	08	Yes	Fast turn off. To perform a fast turn off, see Stopping the system in the Basic system operations topic collection.
09 through 10	Not applicable	Not applicable	Reserved.
11 through 19	11 through 19	Yes	System reference code (SRC) displays an SRC on the control panel.
20	20	Yes	Display the machine type, model, processor feature code, processor class indicator, and IPL path description.
21	21	Yes	Cause the Use Dedicated Service Tool (DST) display to appear on the system console. To exit DST, select the Resume operating system display option.
22	22	Yes	Force system main storage dump.
23	Not applicable	Not applicable	Reserved.
24	Not applicable	Not applicable	Reserved.
25	25	Yes	Use Service switches 1 and 2 to enable or disable functions 50 through 70.
26	26	Yes	Use Service switches 1 and 2 to enable or disable functions 50 through 70.
27 through 32	Not applicable	Not applicable	Reserved.
33	33	Yes	Reorder SPCN addressing.
34	34	Yes	Retry main storage dump (MSD) IPL.
35 through 49	Not applicable	Not applicable	Reserved.
50	Not applicable	Not applicable	System processing unit stop.
51	Not applicable	Not applicable	System processing unit status displays the following values: B0 register contents, Next Instruction Address (NIA), and current Task Dispatching Element (TDE) contents
52	Not applicable	Not applicable	System processing unit start.
53	53	No	Unconfigure an intermittently failing processor (Repeat GARD function)
54 through 56	Not applicable	Not applicable	Reserved.
57	Not applicable	Not applicable	Display area addresses for system data.
58	Not applicable	Not applicable	Set the first character of the base address for the function 62 display.
59	Not applicable	Not applicable	Set the second character of the base address for the function 62 display.
60	Not applicable	Not applicable	Set the third character of base address for function 62 display.
61	Not applicable	Not applicable	Set the fourth character of base address for function 62 display.
62	Not applicable	Not applicable	Display service processor storage.
63	Not applicable	Not applicable	System status SRC trace.
64	Not applicable	Not applicable	Service processor diagnostic status SRC trace.
65	65	Yes	Deactivate remote service.
66	66	Yes	Activate remote service.
67	67	Yes	Disk unit IOP reset/reload is enabled only by specific disk unit SRCs.
68	68	Yes	Concurrent maintenance power domain Power Off.
69	69	Yes	Concurrent maintenance power domain Power On.
70	70	No	Dump service processor control storage.
Power button	Power button in graphical interface -- for powering on and off the system. (LAN-connected remote control panels cannot turn on the system.)	Power button in graphical interface -- for powering off the system only.	OFF = Delayed turn off. ON = Immediate power on (can be timed turn on).
Keystick	See note.	See note.	IPL keylock - Manual, Auto, Normal, Secure.
Attention light	Graphical attention light	Yes	Attention state LED.
Power indicator	Power indicator in graphical interface	Power indicator in graphical interface	Lit when power is fully operational.
The remote control panel and virtual control panel recognize the presence of a keystick. If your system uses a keystick, the Mode button works with the same functions as the physical control panel, depending on whether the keystick is inserted. LAN-connected remote control panels need special authority to use the Mode button.