Allen-Bradley 1785 PLC-5 User Manual

Addressing Reference
1785 PLC-5
20
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Example ASCII Structure Addresses
To Address: PLC Data Type: Example Address:
Whole ASCII String
Structure
structure $ST12:0
Length Word signed word $ST12:0.LEN
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PID Mnemonics in PD File
Mnemonic Structure Member Size PLC Data Type
.INI PID Initialized 1 bit bit
.SPOR SP Out of Range 1 bit bit
.OLL Output Limit Low 1 bit bit
.OLH Output Limit High 1 bit bit
.EWD Error Within Dead Band 1 bit bit
.DVNA Deviation High Alarm 1 bit bit
.DVPA Deviation Low Alarm 1 bit bit
.PVLA PV Low Alarm 1 bit bit
.PVHA PV High Alarm 1 bit bit
.EN Enable 1 bit bit
.CT Cascaded Type 1 bit bit
.CL Cascaded Loop 1 bit bit
.PVT PV Tracking 1 bit bit
.DO Derivative 1 bit bit
.SWM Software A/M Mode 1 bit bit
.CA Control Action 1 bit bit
.MO Station Mode (auto/manual) 1 bit bit
.PE PID Equation Type 1 bit bit
.SP Set Point 4 bytes IEEE float
.KP Proportional Gain 4 bytes IEEE float
.KI Integral Gain 4 bytes IEEE float
.KD Derivative Time 4 bytes IEEE float
.BIAS Output Bias % 4 bytes IEEE float
.MAXS Set–point Maximum (scaled value) 4 bytes IEEE float
.MINS Set–point Minimum (scaled value) 4 bytes IEEE float
.DB Dead Band 4 bytes IEEE float
.SO Set Output % 4 bytes IEEE float
.MAXO Output Limit High % 4 bytes IEEE float
.MINO Output Limit Low % 4 bytes IEEE float
.UPD Update Time 4 bytes IEEE float
.PV Process Variable 4 bytes IEEE float
.ERR Error 4 bytes IEEE float
.OUT Output % 4 bytes IEEE float
.PVH PV Alarm High 4 bytes IEEE float
.PVL PV Alarm Low 4 bytes IEEE float
.DVP Deviation Alarm + 4 bytes IEEE float
.DVN Deviation Alarm – 4 bytes IEEE float
.PVDB PV Alarm Dead Band 4 bytes IEEE float

Allen-Bradley 1785 PLC-5 Specifications

General

Manufacturer	Allen-Bradley
Memory Size	Up to 64K words
Programming Language	Ladder Logic
Series	PLC-5
Communication Ports	DH+