Series 642 OPERATION
742280ED Edition 2017-11-24 83/
5.1.2 Individual valve status
This function is available on the Master valve only.
The Master valve holds a record of information about the status of the complete valve cluster. Therefore
status information about all valves (Master and Slave(s)) connected to the valve cluster is available from
the Master valve. Refer to chapter «Inquiry commands» > «CLUSTER VALVE STATUS» for details.
5.1.3 Freeze mode
This mode enables an individual valve to be controlled independent of the valve cluster. As soon as a
valve is set to Freeze mode (freeze), it will remain in the last position it received from the Master valve
before it was frozen. Now it is listening to commands addressed directly to it. Refer to chapter «Setup
commands» > «FREEZE MODE» and «Inquiry commands» > «FREEZE MODE» for details.
The Freeze mode status is stored in a power save memory of each
individual valve. In case valve was in freeze mode before power cycle
(power off, power on), valve will stay in freeze mode after power up.
Valve will not accept freeze command when:
1. Digital input is active
2. Valve not yet synchronized
As soon as a valve is unfrozen, the valve starts to follow the Master valves
plate position, meaning the plate might move immediately.
5.1.4 Position offset
The position offset can be used to add or subtract a certain offset value from the current position that is
received from the Master valve. It might be helpful to compensate variations in pumping speed of the
individual exhaust lines. Refer to chapter «Setup commands» > «CLUSTER POSITION OFFSET» for
details.
The position offset value will be stored in a power save memory of each individual
valve.
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