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In a stage 2 ’white box’ frame, the secondary nodes can be located in the PCC and
the ac module of the rack-mounted units.
In a stage 2 ’black box’ frame, the secondary node is in the ac module.
In a stage 3 system (Version 4 Release 1 minimum), the secondary nodes are located in
the bulk power supplies, on a card, or on a backplane of the unit. Secondary nodes
are present in the ac modules of attached frames.
In frames with a PCI system bus, the secondary node is located in the PCI cage,
the power supply, on a card, or on the backplane.
SPCN addressing
A rack-mounted unit is identified and located by a frame address and a unit
address. A frame address is fixed and is assigned by the primary node or by the
operating system. A unit address is fixed and determined by the SPCN port to
which the unit is connected.
The frame and unit addresses are normally displayed on the control panel of the
secondary node (for example, the FC 5042 unit). They appear in the following
format:
*RRU RR = The rack address (01 - 62)
U = The unit address (1 - A)
Note: In frames with a PCI system bus, the control panel only displays the rack
address: *RR.
SPCN menu flow
Problems that are reported to the operating system by the SPCN are logged. To
work with the SPCN information, select the System Power Control Network (SPCN)
option under the Hardware Service Manager function.
Hardware Service Manager
Warning: This utility is provided for service representative use only.
System unit.......: 9406-500 10-xxxxx
Release.........: V3R6M0 (1)
Select one of the following:
1. Packaging hardware resources (systems, frames, cards,...)
2. Logical hardware resources (busses, IOPs, controllers,...)
3. Locate resource by name
4. Failed non-reporting resources
5. System power control network (SPCN)
6. Work with service action log
7. Display label location worksheet
Selection
_
F3=Exit F6=Print configuration F9=Display card gap information
F10=Display resources requiring attention F12=Cancel
Figure 80. Example Hardware Service Manager display for Model 5xx (in the full or limited
environment)
232 Service Functions V5R2