Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller CUSTOMIZATION GUIDE - Manual (Page 63)

F-CIM 47
DEVIATION/ALARM CALCULATION - 0
NOT REUSABLE
INPUTS NAME SYMBOL DATAPOINT
S n-1 SETPOINT SP0 C101
A PROCESS VARIABLE PV0 C100
PARAMETERS SETPOINT SLEW RATE T10 C117
CONTROL ZONE C20 C114
ALARM INDEX AIX0 B335
ALARM LIMIT 1 PL10 C103
ALARM LIMIT 2 PL20 C104
ALARM DEADBAND ADB0 C105
OUTPUTS
S n DEVIATION DV0 C121
ALARM A PA10 L110
ALARM B PA20 L111
TRUE SETPOINT TSP0 C119
Description:
This module calculates and loads the deviation value based on setpoint (S
n
) and
process variable (A). Before the calculation is performed the setpoint value is con-
ditioned so as not to exceed the rate of change limit specified by T1. If the calcu-
lated deviation falls within the CZ value, then deviation is forced to 0.0. This
module also determines if alarm conditions exist based on AIX, PL1, PL2 and
ADB. Results of the alarm tests are loaded to PA1 and PA2. Refer to Section
4.1.6 of Instruction Bulletin 53MC5000 for an explanation of AIX values.
MODULAR CONTROLLER CUSTOMIZATION GUIDE
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