MKS 651C - How to Change the Valve Position Output; How to Change the Valve Control Direction

How To Configure the Valve Parameters Cha
p
ter Six: Remote O
p
eration
86
How To Change the Valve Position Output
The valve position output can be configured for 5 Volts or 10 Volts full scale. The 651
controller is initially configured for 10 Volts. To change the valve position output, follow the
steps below.
1. To change the valve position output range, issue the command:
B
value
ENTER
where
value
is 0 for the 5 Volt range; 1 for the 10 Volt range.
2. To check the current valve position output, issue the request:
R31
ENTER
The 651 controller responds with the message:
B
value
where
value
is 0 for the 5 Volt range; 1 for the 10 Volt range.
How To Change the Valve Control Direction
A valve can be controlled to open and close in a
direct
or
reverse
direction.
Direct
valve control
direction is defined as valve open at 100% of the valve position’s full scale and valve close at
0%.
Reverse
valve control direction is defined as valve open at 0% of the valve position’s full
scale and valve close at 100%.
The 651 controller is initially configured to use direct action to control the valve.
1. To change the direction, issue the command:
N
value
ENTER
where
value
is a 0 for direct direction; 1 for reverse direction.
2. To check the current valve control selection, issue the request:
R32
ENTER
The 651 controller responds with the message:
N
value
where
value
is a 0 for direct action; 1 for reverse action.