Emerson 3051S Especificaciones descargar pdf (Pagina 91)

Reference Manual

00809-0200-4801, Rev CA

July 2010

6-13

Rosemount 3051S

Figure 6-9. Example of PID

Control within a Pressure

Transmitter

Using SPM, it is possible to detect problems in the control loop. For example,

an increase in the cycling or oscillation of the control loop could be indicated

by an increase in the standard deviation.

If SPM has already been enabled, it must first be disabled, before any

additional SPM blocks can be configured. First, set

SPM_Active = Disabled

Next, to configure SPM2 to monitor the PID control loop, you would set the

parameters as shown in Figure 6-10.

SPM2_Block_Tag = FFPID_RMT5

SPM2_Block_Type = PID Block

SPM2_Parameter_Index = OUT

Figure 6-10. Example

Configuration of SPM Using a

Function Block

Set the High Variation Limit (or other limits) as desired, and set the user

command to “Learn” in order to begin the learning process for this SPM Block.

Finally, verify that SPM_Monitoring_Cycle and SPM_Bypass_Verification are

set as desired, and set the SPM_Active Parameter to “Enabled” (with or

without the filter)

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Emerson 3051S Especificaciones Pagina 91