Pfeiffer Vacuum A 1204H, Operating Instructions Manual

Page: 43 / 92

Advanced settings
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7.9 Management and monitoring of the motor rotation frequencies
When the motors of the functional block and/or Roots are powered by a frequency vari-
ator, the management mode can be selected (FIXED or ANALOG) depending on the ap-
plication. These modes are used to define the rotation frequencies: minimum, intermedi-
ate or maximum. These values depend on the model.
The management mode is selected with the pump stopped using:
– from HHR [SETTING] [FREQUENCIES] [FB FREQ]/[R1 FREQ] [FIXE]/[ANALOG]
(see 8.2) , or
– from serial link (see Serial link operating instructions) .
FIXE In this mode, the rotation frequency parameters are set using the HHR or by RS. Prepro-
grammed frequencies can be selected
ANALOG The analog management mode is only possible if [IDLE MODE] is [DESABLED] . The
rotation frequency is defined by an analog input J3 (user connection) (see 8.4.3) . The
selected rotation frequency depends on the input voltage applied.
7.10 IDLE mode
This mode allows electricity consumption to be reduced by lowering the speed of rotation
of the pumps (if the product is fitted with the frequency converter) and/or the nitrogen
consumption by closing the stand-by valve
(4) (see 7.1) independently of the purge
valve, when the equipment is not on a process.
When this mode is set in menu [DEFINITION] [MODE IDLE] [ENABLED] (see 8.2) , dif-
ferent options can be selected via the status of the logic inputs User1, User2 and User3
(
J3 connector) (see 8.4.2) :
– STANDBY purge + minimum rotation speed
– STANDBY purge + intermediate rotation speed
– STANDBY purge only
– Minimum rotation speed only.
The option selected is displayed on HHR (see 8.2) .
Note : when the IDLE mode is activated while the STAND-BY mode is activated, the
IDLE mode becomes a priority.
Choosen rotation frequency analog mode)
Minimum Intermediate Maximum
BF (all models) 50 Hz 50 Hz 50 Hz 50 Hz 60 Hz
Roots (A 604H/A 804H/A 804X) 30 Hz 50 Hz - - 60 Hz
Roots A 1204H 30 Hz 55 Hz - - 80 Hz
Roots (A 1504H/A 1504X) 30 Hz 55 Hz - - 75 Hz
Roots (A 1804H/A 1804X) 30 Hz 55 Hz 75 Hz - 100 Hz
Roots (A 2404H/A 2404X) 30 Hz 65 Hz 75 Hz 85 Hz 95 Hz
Roots (A 2504H/A 2504X) 30 Hz 60 Hz 65 Hz 70 Hz 75 Hz
Roots (A 3004H/A 3004X) 30 Hz 65 Hz 75 Hz 85 Hz 90 Hz
[ANALOG] : voltage to apply 7 to 10 V 3 to 7 V 0 to 3 V
DANGER
Risk of process gases’ build-up
Never activate IDLE mode when the pump is running in process!