Allen-Bradley Logix5000 Reference Manual page 514

Chapter 13 Special Instructions (FBC, DDT, DTR, PID)
Mnemonic: Data Type
.DATA REAL[17]
.EN BOOL
.CT BOOL
.CL BOOL
.PVT BOOL
.DOE BOOL
.SWM BOOL
.CA BOOL
.MO BOOL
.PE BOOL
.NDF BOOL
.NOBC BOOL
.NOZC BOOL
.INI BOOL
.SPOR BOOL
.OLL BOOL
.OLH BOOL
.EWD BOOL
.DVNA BOOL
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Description
The .DATA member stores:
Element Description
.DATA[0] Integral accumulation
.DATA[1] Derivative smoothing temporary value
.DATA[2] Previous .PV value
.DATA[3] Previous .ERR value
.DATA[4] Previous valid .SP value
.DATA[5] Percent scaling constant
.DATA[6] .PV scaling constant
.DATA[7] Derivative scaling constant
.DATA[8] Previous .KP value
.DATA[9] Previous .KI value
.DATA[10] Previous .KD value
.DATA[11] Dependent gain .KP
.DATA[12] Dependent gain .KI
.DATA[13] Dependent gain .KD
.DATA[14] Previous .CV value
.DATA[15] .CV descaling constant
.DATA[16] Tieback descaling constant
Enabled
Cascade type (0=slave; 1=master)
Cascade loop (0=no; 1=yes)
Process variable tracking (0=no; 1=yes)
Derivative of (0=PV; 1=error)
Software manual mode (0=no-auto; 1=yes- sw manual)
Control action (0 means E=SP-PV; 1 means E=PV-SP)
Station mode (0=automatic; 1=manual)
PID equation (0=independent; 1=dependent)
No derivative smoothing
(0=derivative smoothing filter enabled; 1=derivative smoothing filter disabled)
No bias back calculation
(0=bias back calculation enabled; 1=bias back calculation disabled)
No zero crossing deadband
(0=deadband is zero crossing; 1=deadband is not zero crossing)
PID initialized (0=no; 1=yes)
Setpoint out of range (0=no; 1=yes)
CV is below minimum output limit (0=no; 1=yes)
CV is above maximum output limit (0=no; 1=yes)
Error is within deadband (0=no; 1=yes)
Deviation is alarmed low (0=no; 1=yes)
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011