User's Manual

P.G. TM0032FE
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2.2 FAULT REPORTING
2.2.1 General
- The A211 amplifier incorporates a number of circuits to detect
deviations in important performance parameters. The standard unit (P/N 001-0211-002)
reports alarm conditions to a remote Monitor unit such as the Model PS212. The local
powered unit has local status indication only.
The various functions are described in this section and may also be referenced in
Section 4 where the programming of amplifier options is discussed.
2.2.2 Report Types
(P/N 001-0211-002 only) - The Model A211 generates two types
of reports depending on the status of the amplifier as determined by the built in monitor
circuits. Each type consists of a numeric code sent as low frequency tones along the
coaxial cable for decoding at the monitor unit.
Under normal operation the unit will transmit an "OK" code at intervals of approximately
80 minutes. This enables the system monitoring unit to keep track that the whole
system is connected and operational. In this mode a local green NORMAL LED lamp is
illuminated on the side of the amplifier.
In the event that a fault is detected in the amplifier, as described later, a "FAULT" code
is transmitted on the cable at intervals of approximately 80 seconds. In this mode a local
red FAULT LED is illuminated on the amplifier. Four LEDS on the side of the unit
indicate which specific local condition is causing the overall FAULT condition as
described in the next section.
In each case the code transmitted identifies the transmitting amplifier by the FAULT
CODE programmed in that particular amplifier as described later in Section 4.6. Before
shipment PG programs each amplifier with a arbitrary code from 1 to 199 which is also
shown by a label on the outside of the unit.
NOTE:
Older models of PG bidirectional amplifiers such as the A181 or A188
transmitted only fault codes, but are compatible with the fault codes transmitted
by the A211. When used with a PS212 Monitor they should be entered in the ID
list as "FAULT ONLY" (TFO) type units. If the A211 is used with a PS200
PS/Monitor the OK code transmission (STATUS option) should be disabled
(section 4.4) as it will cause the PS200 to display a FAULT alarm. Fault codes
above 199 should not be set on any amplifiers since they may be incorrectly
interpreted by the newer PS212.