Bronkhorst Shut-Off Valve Control Adapter - Manual (Page 5)

BRONKHORST
2 OPERATION PARAMETERS
2.1 G
ENERAL INFORMATION
The four least significant bits of the IO Switch Status / General Purpose IO register are used to operate the 2
shut-off valves.
IO Switch Status / General Purpose IO register
Bit 7 6 5 4 3 2 1 0
Read / Write R R R/W R/W
Not
used
Not
used
Not
used
Not
used
Error
Valve 2
Error
Valve 1
Output
valve 2
Output
valve 1
Decimal values 0…3 can be written to the register to operate the 2 shut-off valves.
If the read value of the register differs from the written value, probably an error occurred:
Value Valve status Error
0 inactive -
1 Valve1 active -
2 Valve2 active -
3 Valve1 and Valve2 active -
5 Valve1 active Valve 1 error
7 Valve1 and Valve2 active Valve 1 error
10 Valve2 active Valve 2 error
11 Valve1 and Valve2 active Valve 2 error
12 inactive Valve 1 and 2 error (no supply)
13 Valve1 active Valve 1 and 2 error (no supply)
14 Valve2 active Valve 1 and 2 error (no supply)
15 Valve1 and Valve2 active Valve 1 and 2 error
Detected error situations are:
♦ No valve power supply available
♦ Short circuit in valve (cable)
After power up, the valves are always inactive.
Field Bus safe state will not influence the shut off valve activity.
The Shut-Off Valve Contol adapter functions only with specially configured Bronkhorst instruments.
The analog interface is used for shut off valve operation. Analog setpoint and measure are disabled.
Therefore only field bus or RS232 operation can be combined with the Shut-off Valve Control Adapter.
Do not electrically disconnect and reconnect an activated valve!
For power consumption reduction, the valves are activated according to the holding voltage principle.
Electrical disconnecting and reconnecting of an activated valve will not ensure re-activation of the
valve.
Page 5
Operational instructions for Shut-Off Valve Control Adapter 9.17.068