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
46/77
Command
Acknowledgement
(within 10ms after reception of command)
Inquiry function
Description
Get [i:64][CR][LF]
[i:64][sxxxxxxx][CR][LF]
SENSOR 1 READING
data length 8 characters
s
sign, 0 for positive readings, - for negative readings
xxxxxxx
sensor 1 reading, return value depends on configuration,
refer to «RS485 setup commands, RANGE CONFIGURATION»
for
details
This function returns direct reading from sensor 1 input.
Get [i:65][CR][LF]
[i:65][sxxxxxxx][CR][LF]
SENSOR 2 READING
data length 8 characters
s
sign, 0 for positive readings, - for negative readings
xxxxxxx
sensor 2 reading, return value depends on configuration,
refer to «RS485 setup commands, RANGE CONFIGURATION»
for
details
This function returns direct reading from sensor 2 input.
Get
[i:36][CR][LF] [i:36][abcdefgh][CR][LF]
PRESSURE CONTROL
STATUS
data length 8 characters
a
0 = no pressure control (e.g. if position control is selected)
1 = wide range control (PD control)
2 = close up control (PID control)
cdefgh
reserved, do not use
The controller distinguishes 2 control ranges and acts accordingly.
Get
[i:30][CR][LF] [i:30][abcdefgh][CR][LF]
DEVICE STATUS
data length 8 characters
a
0 = local operation, 1 = remote operation, 2 = locked remote operation
b
1 = synchronization, 2 = POSITION CONTROL, 3 = CLOSED
4 = OPEN, 5 = PRESSURE CONTROL, 6 = HOLD , 7 = LEARN
8 = INTERLOCK (OPEN by digital input)
9 = INTERLOCK (CLOSED by digital input)
C = power failure, D = safety mode
E = fatal error (read «FATAL ERROR STATUS» for details)
c
0 = Power Failure Option (PFO) disabled
1 = Power Failure Option (PFO) enabled
d
0 = no warning, 1 = warning present
(read «WARNINGS» and «ERROR STATUS» for details)
efg
reserved, do not use
h
0 = normal operation, 1 = simulation running
This function returns status information about the valve.
Note: In simulation mode the valve can demonstrate pressure control capability
independent of other equipment such as vacuum chamber, flow controller and gauge.
Normal operation is not possible when simulation is running.
