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Opon
number
Descripon of vent funcon
4 In a fail condion, vent valve fully opens. If a stop command is
received, vent valve opens fully below 50% full rotaonal speed.
5 In a fail condion, vent valve fully opens. If a stop command is
received, controlled venng from 100% to 50% full rotaonal speed
and then vent valve opens fully below 50%.
6 Vent valve fully opens for a stop command or a fail condion.
7 Same as opon 6
8
Auxiliary output is permanently energised (Fan).
§
9 Do not use
10 Auxiliary output is permanently de-energised (Fan).
11 Do not use
12 Do not use
13 Do not use
14 Vent valve opens fully below 50% full rotaonal speed for a stop
command.
15 Controlled venng from 100% to 50% full rotaonal speed and then
vent valve opens fully below 50% for a stop command.
*
This is the factory default seng for Vent Opon 1.
§
This is the factory default seng for Vent Opon 2 to enable cooling fan behaviour.
Table 24 Valve types
Opon number Descripon of valve type
0
Normally open vent valve
*
1 Normally closed vent valve
*
This is the factory default seng for Valve 1 type and Valve 2 type.
When the pump is shipped, the controller is congured with the factory default Vent
opon 1 set to 0 and the Valve 1 type set to 0, as given in Table: Vent valve opons on
page 69 and Table: Valve types on page 70. The controller can be congured to one of
the other venng opons provided commands can be sent through the serial interface
or a manufacturer's TIC Turbo and Instrument Controller or TIC Turbo Controller or the
manufacturer's nST PC soware can be used through the USB serial port.
If the valve type is set to normally open, the controller only energises or shuts the TAV
solenoid valve when it receives a start command. Before that, the valve will be in the
‘open’ vent state. If the vacuum system is large, allow the backing pump to decrease the
pressure in the system to a permied level before you start the pump. Send a command
through the serial interface to close the vent valve before sending a start command –
this is known as a delayed start.
If the valve type is set to normally closed, and vent opons 14 or 15 are used, the
controller will ensure that the TAV solenoid valve will only ever ‘open’ upon receipt of a
stop command. There is no need to send the delayed start command.
Page 70
B8G000880_D - Operaon