Installation, Operating & Maintenance Instructions
Series 650 DN 100-250 (I.D. 4“ - 10”), RS485
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel ++41 81 771 61 61 Fax ++41 81 771 48 30 Email
www.vatvalve.com
271149EA
2007-06-12
53/77
Command
Acknowledgement
(within 10ms after reception of command)
Setup function
Description
Set [s:21][abcdefgh][CR][LF]
[s:21][CR][LF]
Get [i:21][CR][LF]
[i:21][abcdefgh][CR][LF]
RANGE
CONFIGURATION
data length 8 characters
a
range for POSITION: 0 = 0 – 1’000, 1 = 0 – 10’000, 2 = 0 – 100’000
bcdefgh
upper value for PRESSURE and SENSOR READING: 1000 ... 1000000
e.g. 010000 -> pressure range 0 – 10’000
This function defines the communication range between the valve and the host computer for
POSITION, PRESSURE and SENSOR READING.
Note: In case ZERO has been performed, gauge offset for PRESSURE and SENSOR
READING is compensated.
Note: In case 2 sensor operation for pressure control is selected, PRESSURE covers high
range gauge because switchover between sensors is done automatically.
SENSOR 1 READING and SENSOR 2 READING always return full scale values according
to selected range.
Above picture shows a 2 sensor system. In this configuration sensor 2 covers low range (100 mTorr) and sensor 1
covers high range (1 Torr). RANGE CONFIGURATION for PRESSURE resp. SENSOR READING is set to 10’000.
Switchover between sensors is done automatically.
0-
10V
High range
sensor
Low range
sensor
0-
10V
SENSOR 1 READING
0 – 10’000
100 mTorr
1 Torr
0 mTorr
SENSOR 2 READING
0 – 10’000
PRESSURE
0 – 10’000
