VAT 642 Series User Manual

INSTALLATION Series
642
56/119 Edition 2017-11-24 742280ED
4.8 RS232 interface commands
4.8.1 RS232 command syntax
• Commands and values are case sensitive.
• Acknowledgement within 10ms after reception of command.
• Wait for acknowledgement before sending a new command.
• Command termination of each command is CR and LF.
CR = Carriage Return (0D hexadecimal), LF = Linefeed (0A hexadecimal)
4.8.2 Control commands
Control function
Command Acknowledgement
Description
CLOSE VALVE
Set
C: C:
Valve will close.
OPEN VALVE
Set
O: O:
Valve will open.
HOLD
Set
H: H:
This function stops the valve at the current position. It is effective in PRESSURE
CONTROL and POSITION CONTROL. The function can be revoked by a POSITION
CONTROL, PRESSURE CONTROL, OPEN VALVE or CLOSE VALVE command.
POSITION CONTROL
Set
R:aaaaaa R:
Get
i:38 i:38aaaaaaaa
data length for Set 6 characters, for Get 8 characters
aaaaaa position SETPOINT, value depends on configuration,
refer to «RS232 setup commands, COMMUNICATION RANGE»
for details
Change to POSITION CONTROL mode and transfer of position SETPOINT value resp.
reading of position SETPOINT.
Remark: Reading returns position setpoint only in case pressure control is not selected.
PRESSURE CONTROL
Set
S:aaaaaaaa S:
Get
i:38 i:38aaaaaaaa
data length 8 characters
aaaaaaaa pressure SETPOINT, value depends on configuration,
refer to «RS232 setup commands, COMMUNICATION RANGE»
for details
Change to PRESSURE CONTROL mode and transfer of pressure SETPOINT resp.
reading of pressure SETPOINT.
Remark: Reading returns pressure setpoint only in case pressure control is selected,
otherwise position setpoint is returned.

VAT 642 Series Specifications

General

Brand	VAT
Model	642 Series
Category	Control Unit
Language	English