Specifications

Document 12245 Rev. I Sheet 39 of 39
After the fault condition has been rectified, bits can be cleared in the Latched Fault Mask by issuing a Fault
Reset command (see section 3.5). A latched fault can only be cleared if the faulting condition no longer
exists. Latched faults can also be cleared from the front panel, or using a parallel I/O Fault Reset input. When
latched faults are reset:
 All Latched Fault Mask bits that do not have corresponding bits set in the Active Fault Mask are
cleared.
 If all bits are cleared in the Latched Fault Mask, the service request contact is cleared.
Also, note that powering the SSPA off will reset any latched faults, so if the unit was switched off to repair a
problem, resetting faults may not be necessary.
4.2 Fault Descriptions
The many fault conditions that can be detected by the SSPA are reported via the serial I/O fault handing
mechanism (see section 3.3). More information about many of these faults can be obtained from other
messages. See the SSPA documentation for detailed explanations of the fault conditions.
4.3 Serial Port Relay Contacts
A relay contact set available on the serial I/O connector can be programmed to provide a Service Request
indicator, which will be actuated (placed in its Fault state) whenever any fault or warning is detected by the
amplifier. This contact can be used as a status signal to alert the status monitor system that a condition
requires attention. The unit can then be polled to determine the nature of the problem. The Service Request
is cleared (relay placed in its normal state) when any one of the following occurs:
 A Clear Service Request command (section 3.4) is received on the serial port; or
 All latched or active fault conditions are no longer being reported, due to either non-latched warning
conditions clearing, or due to a Fault Reset command (section 3.5) being issued when no active
conditions are detected.
This relay contact can also be programmed as either Summary Alarm or Active Fault. When it is set for
Summary Alarm, the relay is placed in its fault state whenever any latched or active fault or warning is being
reported. The Summary Alarm clears when no latched or active fault or warning conditions are being
reported.
When set for Active Fault, the relay is placed in its fault state whenever any active fault is detected by the
amplifier. The Active Fault indication is cleared when there are no longer active faults detected (even if there
are still latched faults). Warnings have no effect on the relay in this mode.
The Active Fault setting is the default. This setting is ideal for use in a redundant system, controlled by an
external controller.
Note that the choice of Service Request, Summary Alarm, or Active Fault only affects the behavior of the
relay on the serial port of the amplifier itself. The serial port relay on an attached RCP-2001 always behaves
as a Service Request.
Also, note that in previous versions, warnings could only occur if an RCP-200X were attached to the amplifier,
so the distinction between whether a fault or warning would affect the relay contact (with no RCP-200X
present) was meaningless.