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
48/77
Command
Acknowledgement
(within 10ms after reception of command)
Inquiry function
Description
Get [i:32][CR][LF]
[i:32][abcdefgh][CR][LF]
LEARN STATUS
data length 8 characters
a
0 = LEARN not running, 1 = LEARN running
b
0 = LEARN data set present, 1 = LEARN data set not present
c
0 = ok
1 = last LEARN interrupted by user (control command)
2 = last LEARN interrupted by control unit
(valve open pressure > sensor full scale)
d
0 = ok
1 = valve open pressure > 50% sensor full scale (gasflow too high)
2 = valve open pressure < 0 (sensor offset present)
e
0 = ok
1 = valve max. throttle pressure < 10% sensor full scale (gasflow too low)
f
0 = ok
1 = pressure not raising during LEARN (gasflow missing)
g
0 = ok
1 = sensor unstability during LEARN
h
reserved, do not use
This function checks the status of LEARN and indicates if the conditions during LEARN
were ok.
Get [i:34][CR][LF]
[i:34][0xxxxxxx][CR][LF]
LEARN PRESSURE
LIMIT
data length 8 characters starting with a zero
xxxxxxx
pressure limit for LEARN, return value depends on configuration,
refer to «RS485 setup commands, RANGE CONFIGURATION»
for
details
This function returns the pressure limit applied for LEARN.
Get [i:52][CR][LF]
[i:52][abcdefgh][CR][LF]
ERROR STATUS
data length 8 characters
a
reserved, do not use
b
1 = sensor 1 signal converter failure
c
reserved, do not use
d
1 = firmware memory failure
efgh
reserved, do not use
This function returns an error code in case of any malfunction of the device otherwise 0 is
returned.
Get [i:50][CR][LF]
[i:50][abc][CR][LF]
FATAL ERROR
STATUS
data length 3 characters
abc
error code, see «Trouble shooting» for details.
This function returns an error code in case of any malfunction of the device.
