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172-082010_400 I Series Software Page 29 of 35
This is the flow setpoint value that the controller is trying to implement. This may be
the analog setpoint, the digital setpoint or some other value such as 0.00 if the valve is
in shutdown mode. The command source is controlled by the values stored in V1 and
V2. This item configures or reports the setpoint in the flow units chosen in the active
gas record (G7).
item 9 :impl setpt: % of full scale (read only)
read V9(cr) or *[aa]V9(cr)
Sample reply: 56.23 %(cr)>
This is the flow setpoint value that the controller is trying to implement. This may be
the analog setpoint, the digital setpoint or some other value such as 0.00 if the valve is
in shutdown mode. The command source is controlled by the values stored in V1 and
V2. This item configures or reports the setpoint as a % of the full scale flow value
listed in the active gas record (G2).
item 10:cntrlld var: % of full scale (read only)
read V10(cr) or *[aa]V10(cr)
Sample reply: 56.23 %(cr)>
This is the current value of the system parameter that is being controlled by the valve.
In a flow controller this is the current flow reading. This item reports the flow as a %
of the full scale flow value listed in the active gas record (G2).
item 11:cntrlld var: flow units (read only)
read V11(cr) or *[aa]V11(cr)
Sample reply: 101.23 SLM(cr)>
This is the current value of the system parameter that is being controlled by the valve.
In a flow controller this is the current flow reading. This item reports the flow in the
flow units chosen in the active gas record (G7).
item 12:softstart type:
Reserved for future use
item 13:softstart value:
Reserved for future use
item 14:trckg error: flow units (read only)
read V14(cr) or *[aa]V14(cr)
Sample reply: 5.01 SLM(cr)>
This is the error between the desired flow (setpoint command) and the actual indicated
flow reported in the flow units chosen in the active gas record (G7). It is normal for
significant errors to occur for a short time immediately after a change in the setpoint
due to the time it takes to move the valve to a new stable position. This error should
decrease over time and approach a very small value. A large error that persists for a
significant amount of time after a change in the command signal is an indication of a
failure in the system. Typically, this is caused by insufficient pressure for the
requested flow or a failed valve.
item 15:trckg error: % of full scale (read only)
read V15(cr) or *[aa]V15(cr)
Sample reply: 0.31 %(cr)>
This is the error between the desired flow (setpoint command) and the actual indicated
flow reported as a % of the full scale flow value listed in the active gas record (G2). It
is normal for significant errors to occur for a short time immediately after a change in