Technical Specifications

89
AO Block Tab
Configuration Services
AO Block Tab
Use this tab (Figure 78) to set limits on the Set Point received from another function
block in (Cas) or a remote application (RCas). The rates at which the Set Point is
permitted to move up and down can also be limited.
Figure 78 AO Block Tab-Configuration Dialog Box
Limits
AO Set Point High
Limit (%)
Use this to limit the Set Point from another function block or
remote application.
The limits applied in the Configure Position dialog box act on
the Target Position, not on the Set Point.
AO Set Point Low
Limit (%)
Use this limit to prevent the valve from closing in response to
the Set Point from another function block or remote application.
Set Point Up Rate
Limit (%)
Ramp rate where the upper Set Point changes are acted on, in
Auto mode, at PV unit per second. If the ramp rate is set to zero
or the block is in a mode other than Auto, the Set Point is used
immediately.
The Set Point from another function block or remote application
can also be limited to change at a configurable ramp rate. The
ramp rate up and the ramp rate down can be individually config-
ured. The default value is 1.#INF (infinity), which eliminates
ramp rate limiting.