ERS/FT II Power On Self Test

Diagnostic tests are performed every time the ERS/FT II subsystem is powered on. The tests, their corresponding error codes, and their status of fatal or nonfatal are illustrated in Table 1.

If an error is detected, an error code is displayed using the three digit display on the front panel (figure 1) as follows: the letter "E", indicating an error, is displayed as the BC Group; the first hexadecimal digit of the error code will be displayed as the Multiport Board; and the second hexadecimal digit of the error code will be displayed as the MP Serial Port.

Fatal errors will prohibit subsystem operation until power is cycled and the error is resolved. Nonfatal errors will be displayed briefly (about one second) on the front panel, but they will not prevent the subsystem from functioning.

Any errors detected while the ERS/FT II is running are displayed on the front panel in the same manner as the Power On Self Test errors. None of the runtime errors are fatal. The runtime errors are explained in Table 2.

Error Code in hexadecimal	Cause of Error	Subsystem Response
71 - 78 and 7C	The operator attempted to switch groups while the floppy was active on the current group. The current group number is added to 70 hex and displayed as the error code (7C represents the Custom Channel).	The group will remain unchanged. The error code will display until the operator releases the BC group push-button.
81 - 88 and 8C	The operator attempted to switch groups or enable the subsystem but the processor in the new group cannot be detected by the multiplexor. The group number of the new group is added to 80 hex and displayed as the error code (8C represents the Custom Channel).	The new group is selected, but the channel on the multiplexor cannot be enabled. The error code will be displayed until the operator releases the push-button that caused the error condition to occur.
90	The subsystem is locked or disabled, and the floppy channel 1 option is enabled on the option switch, but no BC processor is connected to channel one on the multiplexor.	The subsystem lock or disable is executed normally. The error code will be displayed briefly and then the display will return to its normal state.

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Hexadecimal Error Code	Test Description	Status
10	IES CPU Test	Fatal
11	Processor Bus Test	Fatal
12	PROM Checksum Test	Fatal
13	Read/Write Static RAM Test	Fatal
14	Multiplexor Board Presence Test. This test verifies that the multiplexor board is properly cabled to the IES board.	Fatal
20	Indicates that the system was reset by a hardware watchdog timer.	Nonfatal
25	Analog to Digital Converter Test	Nonfatal
26	Real Time Clock Battery Test	Nonfatal
27*	Slot Fuse Test. The slot power LEDs will be illuminated during the time that this error code is displayed on the front panel to indicate which slot is not receiving power.	Nonfatal
28	Floppy Drive Test. Verifies that the floppy drive is active when the subsystem is powered on. This error generally indicates that the floppy cable is backward.	Nonfatal
29	Multiplexor Channel Test. Verifies that the hardware is correctly selecting different mux channels.	Nonfatal
30	Push-button Test. Verifies that no push-buttons indicate they are being pressed. This test fails if the operator is pressing a button on the front panel.	Nonfatal
31	Floppy Fuse Test	Nonfatal
32	Keyboard Fuse Test	Nonfatal
41 - 48*	BC Processor Installation Test #1. If more than one BC is found in a single group, the group number is added to 40 hex and displayed as the error code.	Nonfatal
51 - 58*	BC Processor Installation Test #2. If no BC is found in a group, the group number is added to 50 hex and displayed as the error code.	Nonfatal
61 - 68*	Multiport Configuration Test. If more than one MP board is assigned the same address in the same group, the group number is added to 60 hex and displayed as the error code. This error cannot always be detected.	Nonfatal
A0*	Auto-configuration test. If a hard drive is powered by one group while servicing another, this error displays. Note that this error cannot always be detected.	Nonfatal
A1*	Power down test. Power to all groups was shut off but, after 15 seconds one or more groups remains in "power on" state. This error generally applies to boards with large amounts of capacitance or faulty power relays.	Nonfatal
A2	Backplane test. At power on, an ERS/FT II checks to see which backplane is installed. This error is generated when an unrecognizable backplane is detected. Note that this error may also be the result of faulty relays. If a 14 + 2 backplane is installed, this code always occurs during startup (the 14 + 2 is not equipped with relays). This is considered normal and performance is not affected.