Agilent Technologies 969-8888, Инструкция по эксплуатации

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TECHNICAL INFORMATION
86/107 87-901-011-01
Both low speed value (win.117) and high-speed
value (win.120) are limited between 500 Hz (can’t
be set by the user) and “Maximum excitation fre-
quency” (win.121, 530 Hz default).
NOTE
The duty cycle percentage is referred to the low
level portion of the PWM period.
SOFT START
: input signal to activate the soft start
function. This function must be activated (pin-7
shorted with pin-9) if the pump remains unused for 1
month or more, and de-activated for the next run-up.
The soft Start phase is around 45 minutes long. The
soft start function is factory enabled for the first sys-
tem start-up. After the first pump start-up until the
normal status, the soft start is automatically disabled.
ANALOG OUTPUT
: this output signal is a voltage
(from 0 to 10 Vdc) proportional to a reference quan-
tity (frequency or power) set by the user through se-
rial line (window 111). The default setting is the
frequency (see the following example diagram).
The voltage is provided between pins 14 and 15.
An high impedance input should be connected to
this output (> 100 k
Ω ).
FAULT
: this relay output signal is closed when any
system fault condition is detected. To detect the
type of failure the serial protocol is needed (see
the para. "RS232-485 Comunication Description").
SET POINT
: this relay output signal is enabled
when the reference quantity chosen (frequency, cur-
rent or time) is higher than the set threshold. The
signal can be "active close", or "active open". More-
over, if the reference quantity is the frequency or the
current drawn, it is possible to set the hysteresis (in
% of the threshold value) to avoid bouncing.
For example:
- reference quantity: frequency (window 101=0)
- threshold: 500 Hz (window 102=500)
- hysteresis: 1% (window 103=1)
- activation type: "active close" (window 104=1)
The set point output stays open until the frequency
becomes higher than 505 Hz (that is 500 Hz + 1%
of 500 Hz), then the output goes closed and stays
colsed until the frequency becomes lower than 495
Hz (that is 500 Hz – 1% of 500 Hz).
It is possible to mask the set point checking for a
programmable mask time (window 103).
The set point signal has the following default set-
tings:
- reference quantity: controller status
- thereshold: not relevant
- hysteresis: not relevant
- activation type: active close (NO)
- delay time: 0 second
PURGE/VENT VALVES
: the Turbo-V 3K-G pump-
ing system integrates the “purge” and “vent”
valves. The two valves are Normally Closed so if a
power fail occur, the valves will remain closed.
The valves operating mode is independent from
the controller operating mode. That means the
user can manage the pump by serial line
(start/stop, soft start…) and drive the valves by
remote I/O connector, or vice versa. The valve op-
erating mode can be set by serial line with win.125
and 146, see following diagram for details.
In remote mode you can open the purge valve
(N.C.) connecting pin10 of J1 to pin 9, or supplying
24 Vdc between pin 10 and pin 15. The same
thing occurs for the vent valve with pin 12.
Note that the vent and purge valve can also be
controlled by means of the serial connection (see
the following diagram for details).