Micromod MOD: 1800P - MOD 30ML Identity Module (Version 2) Manuale Utente Scaricare il pdf (Pagina 39)

Continuous Control Functions

PID CONTROL BLOCK

2-33

101

Input Filter Time Constant

(FILTIME)...............................................................................CWR

The filter time in minutes (floating point value) when USER is specified as the filter type.

Otherwise, it is 0.0.

value Any floating-point value in minutes

where

0.0 = no filtering (last sampled value is the input value)

1.0 = a 1 minute

1000.0 = 1000 minutes (maximum value)

Note that exceptionally large values tend to maintain the previous value whereas very small

values tend to maintain the most recent sampled value.

2.2.3 Typical Block Connections for PID Block

Typical softwiring block structures used on softwiring diagrams are shown in Figure 2-7.

PID1, OP

PVI

DEV

PVI

Operator write access

to setpoint.

Operator indication

VCI1

Result

AOM1

Input

Result

To Terminations

PA1

ALARMINP PA2

ALARMINP

VCI1

Result

PA4

ALARMINP

PA3

ALARMINP

PID2, PVI

PID2, TS

PID2, SP

PID1

Process Value

Deviation

Rem Stpt Inp.

Setpoint

Track Command

External Feedback

Output

Output Quality

Output Track Inp.

Track Status

PID2

Process Value

Output

Deviation

Figure 2-7. Typical Block Connections for Master/Slave PID Blocks

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 69 70

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Micromod MOD: 1800P - MOD 30ML Identity Module (Version 2) Manuale Utente Pagina 39

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