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
43/77
3.11.5 Command syntax
[function][value][CR][LF]
Each element is separated with square brackets for clarity. Square brackets are not part of command syntax. Unless
otherwise specified all elements are ASCII characters. There are no spaces between the elements necessary. Commands
and values are case sensitive.
Data length of value depends on command. Number of characters is specified in the description. Some commands do not
require the value element.
[CR] is Carriage Return (0D hexadecimal).
[LF] is Linefeed
3.11.6 Addressed communication
Applicable for addressed RS485 communication only. In case of RS485 Point-to-Point setup, addressing is not necessary.
Command
0 1 2 3 4 …
n+3
n+4
# a a a c c CR
LF
Description
code description
data
range
#
identification sign (ascii 35)
aaa
device address
000 - 999
c
command
refer to standard command set
Example
Description: Send “Close” command to valve with RS485 device address 015
Command:
#015C:[CR][LF]
Answer:
#015C:[CR][LF]
3.11.7 Control commands
Command
Acknowledgement
(within 10ms after reception of command)
Control function
Description
Set [G:][abc][CR][LF]
[G:][abd][CR][LF]
INDIVIDUAL VALVE
CONTROL
data length depending on command “c”
a
high byte of cluster valve address in hexadecimal notation (0
hex
to F
hex
)
b
low byte of cluster valve address in hexadecimal notation (0
hex
to F
hex
)
c
command to be executed by valve with address “ab”
Use this command to individually control any valve in the valve cluster.
Note: When trying to operate an individual valve independently, make sure it is in “Freeze
mode” (refer to «RS485 setup commands FREEZE MODE»)
Example:
[G:03c:7501] [CR][LF] Puts valve with address 3 in “Freeze mode” (it will immediately stop
following the master valves plate position and wait for commands
addressed directly to it).
Answer: [G:03c:75] [CR][LF]
[G:03C:] [CR][LF]
Closes valve with address 3
Answer: [G:03C:] [CR][LF]
