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4.4.15 - Communication RS485 for Compressors Management Systems
The combination with the Control Ar Schulz manager is standard for the interface Control II.
More than one FLEX compressor (variable speed) can be controlled by a Control Ar Schulz manager. One FLEX compressor, selected depen-
ding on the control strategy, will be designated as the main compressor and will work at its full range. Other FLEX compressor(s), designated
as base units, will operate at the optimum speed set by each control. If the demand exceeds the total capacity of the system at any time,
all the FLEX compressors will increase the speed above the optimum configuration (up to the set maximum speed) accordingly to keep the
pressure.
The Schulz compressors manager is capable of controlling any combination of fixed or variable speed compressors with great energy-saving
gains.
FAULT MESSAGES
5- FAULT MESSAGES
Faults are abnormal operating statuses or conditions. Alarms are fault statuses that indicate that normal operating conditions were ex-
ceeded, but represent no immediate risk or condition of potential damage. Alarms were designed only as warnings and will not stop the
compressor or prevent it from initiating and going into operation.
The start-up impediments are fault statuses that prevent the compressor from initiating. The start-up impediments are conditions that can
represent immediate risk or condition of potential damage if the compressor is initiated.
A start-up impediment will reset when the condition being monitored returns to normal operational levels. The start-up impediment con-
ditions are only checked during the initial start-up procedure and will not stop the compressor, once it has already started and is in the
"initiated" status. The start-up impediment conditions are not checked during an automatic motor start-up from standby mode.
The operation impediments are fault statuses that prevent the compressor's initiation. The operation impediment faults are conditions that
might represent risk or potential damage if the main motor operates. An operation impediment will be reset when the condition being moni-
tored returns to the normal operational levels. The compressor will be liberated to go out of the standby condition and operate without other
intervention. The operation impediment conditions are checked before the main motor startup and will not stop the compressor once it has
already initiated. The operation impediment conditions do not prevent that the compressor goes into "initiated" condition, that is, when the
impediment condition ends, the compressor will start automatically.
The shutdown failures are fault statuses that represent a risk or damage condition, and the compressor is turned off immediately. The shu-
tdown failure condition must be solved, and the fault reset, before the compressor can be restarted.
The different conditions of fault status are indicated on the display by specific codes, with the last digit indicating the type of fault: E=Shut-
down or General Fault, A= Alarm or Warning, S=Start-up Impediment, R= Load or Operation Impediment. The shutdown errors by general
failure are divided in two different categories: Errors of immediate shutdown and errors of controlled stop. Errors of immediate shutdown
stop the compressor instantly (Emergency stop button activated, for example). Controlled stop errors stop the compressor in a controlled
way, using a normal stop command; the motor will keep operating for the set time until stopping. Errors of immediate shutdown have an er-
ror code, in which the first digit is 0 (zero). Faults of controlled stop have "1" as the first digit. Alarm faults are also divided into two different
categories: alarms and maintenance alarm messages. Alarms begin with "2", maintenance alarm messages with "4". Start-up impediment
codes begin with "3".
Network RS 485
FLEX
E: 0 0 0 0
FLEX
FLEX
Fault description number
Input number
Number of input local
Fault type code
Fault type
99
FLEX
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