PVInValue

PV (Temperature) Input Value

TargetSP

Target Setpoint.

NB – do not write continuously changing values to this variable. The memory technology used in this product has a limited number of write cycles. If ramped setpoints are required, consider using the internal ramp rate function or the Alternative Setpoint available over comms (Modbus address 26 )in preference.

OP

Manual Output Value (resolution 0.1%, i.e. 50% output = 500)

WorkingOP

Working Output

WorkingSP

Working Setpoint (Read Only)

Pb

Proportional Band

Ti

Integral Time (0 = No Integral Action)

Td

Derivative Time (0 = No Derivative Action)

AL1

Alarm 1 Threshold

AL2

Alarm 2 Threshold

SP.SL

Active Setpoint Select (0 = Setpoint 1; 1 = Setpoint 2)

d.bnd

Channel 2 Deadband

cb.Lo

Cutback Low

cb.Hi

Cutback High

r2G

Relative Cool Gain

t.st

Timer Status (0 = Reset; 1 = Run; 2 = Hold; 3 = End)

SP1

Setpoint 1

NB – do not write continuously changing values to this variable. The memory technology used in this product has a limited number of write cycles. If ramped setpoints are required, consider using the internal ramp rate function or the Alternative Setpoint (Modbus address 26) in preference.

SP2

Setpoint 2

AltSP

Alternative setpoint (comms only parameter) may be used as a setpoint or to ramp the setpoint providing a value has been received within a window of about 5 seconds. This may be enabled using the AltSPSelect (address 276). If no value is received then the controller falls back to the currently selected setpoint (SP 1 or SP 2). The Alternative Setpoint may have a local trim (SP Trim, address 27) added to it to compensate for variations in temperature in a particular zone.

This parameter is not saved when the instrument is switched off. It may be written to continuously over communications without risk of damage to the instrument non-volatile memory.

SPTrim

Local Trim – added to the remote setpoint to compensate for local temperature variations in a control zone.

Mr

Manual Reset

oP.Hi

Output High Limit

oP.Lo

Output Low Limit

SP.rr

Setpoint Rate Limit Value (0 = no rate limit)

Error

Calculated Error (PV-SP)

AL1.H

Alarm 1 Hysteresis

AL2.H

Alarm 2 Hysteresis

AL3.H

Alarm 3 Hysteresis

InstStatus

Instrument Status. This is a bitmap:

B0 – Alarm 1 Status

B1 – Alarm 2 Status

B2 – Alarm 3 Status

B4 – Auto/Manual Status

B5 – Sensor Break Status

B6 – Loop Break Status

B7 – CT Low load current alarm status

B8 – CT High leakage current alarm status

B9 – Timer End

B10 – PV Over-range (by > 5% of span)

B11 – CT Overcurrent alarm status

B12 – New Alarm Status

B13 – Timer/Ramp Running

B14 – Remote (comms) SP Fail

B15 – Auto-tune Status

In each case, a setting of 1 signifies ‘Active’, 0 signifies ‘Inactive’.

InverseStatus

Inverted Instrument Status. This is an inverted (bitwise) version of the preceding parameter and is provided so that scrolling messages can be triggered when a condition is not active. Bit mappings are as the “Instrument Status”, Modbus address 75

InstStatus2

Instrument Status 2. This is a bitmap similar to InstStatus and provides a summary of the main instrument status indicators.

B0 – EEPROM Write Frequency Warning Flag

No further bits are used in the current firmware.

Ld.A

Load ON Current

AL3

Alarm 3 Threshold

HyS

Ch1 On/Off Hysteresis in Eng Units

DigIPStatus

Digital Inputs Status. This is a bitmap:

B0 – Not used

B1 – Logic input LA

B2 – Logic input LB

B7 – Power has failed since last alarm acknowledge

A value of 1 signifies the input is closed, otherwise it is zero. Values are undefined if options are not fitted or not configured as inputs.

HyS.C

Ch2 On/Off Hysteresis in Engineering Units

FiLt

Input Filter Time (0 = Off)

SP.Hi

Setpoint High Limit

SP.Lo

Setpoint Low Limit

oFS

PV Offset

C.Adj

Calibration Adjust

IM

Instrument Mode (0 = Operating mode - all algorithms and I/O are active

1 = Standby - control outputs are off

2 = Config Mode - all outputs are inactive)

MVInVal

Input value in millivolts (comms only parameter).

CJCTemp

CJC Temperature

SBrk

Sensor Break Status (0 = Off; 1 = Active)

NewAlarm

New Alarm Status (0 = Off; 1 = Active)

AlLatchStatus

Alarm Latch

LoopBreakAlarm

Loop Break (0 = Off; 1 = Active)

A.tUn

Auto-tune Enable (0 = Off; 1 = Enabled)

A-M

Mode of the Loop (0 = Auto; 1 = Manual)

Ac.AL

Acknowledge all alarms (1 = Acknowledge)

AltSPSelect

Alternate Setpoint enable (comms only parameter for the Alternative Setpoint ).

AltSPPercent

Alternative setpoint in percent

AltSPHi

Alternative input high scalar – sets high range for setpoint input, corresponding to 20mA or 10V depending on the input type.

AltSPLo

Alternative input low scalar – sets low range for setpoint input, corresponding to 4mA or 0V depending on the input type.

AL1Out

Alarm 1 Status (0 = Off; 1 = Active)

AL2Out

Alarm 2 Status (0 = Off; 1 = Active)

AL3Out

Alarm 3 Status (0 = Off; 1 = Active)

Ld.AL

Low Load Current Threshold

LE.AL

High Leakage Current Alarm (0 = Off; 1 = Active)

Hc.AL

Over Current Alarm Threshold

LoadAlarmOut

Load Alarm Status (0 = Off; 1 = Active)

LeakAlarmOut

Leak alarm Status.

OverAlarmOut

Over Current alarm Status (0 = Off; 1 = Active)

Instantaneouscurrent

Instantaneous current

SS.SP

Soft Start Setpoint

SS.oP

Soft Start Power Limit

t.dUr

Requested Timer Duration

t.EL

Elapsed Time

t.rE

Time Remaining

t.thr

Timer Start threshold

Unit

Display Units (0 = Degrees C ; 1 = Degrees F; 3 = None)

uCAL

User Calibration Enable (0 = Off; 1 = Lo; 2 = Hi; 3 = Reset)

DigOPStatus

Digital Outputs Status. This is a bitmap:

B0 – Output 1

B1 – Output 2

B2 – Output 3 on 808 and 804 controllers

B3 – Output 4

It is possible to write to this status word to use the digital outputs in a telemetry output mode. Only outputs whose function is set to ‘none’ are affected, and the setting of any bits in the Digital Output Status word will not affect outputs used for heat (for example) or other functions. Thus it is not necessary to mask in the settings of these bits when writing to this variable.

AdjustHighOffset

Adjust High Offset

AdjustLowOffset

Adjust Low Offset

AdjustHighPoint

Adjust High Point

AdjustLowPoint

Adjust Low Point

Goto

Select access level

P1

Input Type and Range

P2

Decimal Point Position

P3

Low Scale Range Value

P4

High Scale Range Value

P5

Linear Input Low Millivolts

P6

Linear Input High Millivolts

P7

Control Output and Type

P8

Non Linear Cooling Type

P11

Output 1 Function

P12

Output 2 Function

P13

Output 3 Function

P14

Output 4 Function

P15

DC Out Range

P16

Retransmission Initial Scale Value

P17

Retransmission Full Scale Value

P21

Alarm 1 Type

P22

Alarm 1 Latching

P23

Alarm 1 Blocking

P24

Alarm 2 Type

P25

Alarm 2 Latching

P26

Alarm 2 Blocking

P27

Alarm 3 Type

P28

Alarm 3 Latching

P29

Alarm 3 Blocking

P31

Current Transformer Source

P32

Current Transformer Range

P33

Current Transformer Alarm Latching

P34

Loop Break Alarm Time

P35

Sensor Break Alarm Type

P36

Sensor Break Safe Output Power

P37

Break Alarms Output

P41

Timer Configuration

P42

Timer Resolution

P43

Timer End Type

P44

Operative setpoint at start up

P51

Logic input 1 function

P52

Logic input 2 function

P61

Digital communications address

P62

Digital communications baud rate

P63

Digital communications parity

P64

Communications master retransmission parameter

P65

Communications master retransmission address

P71

F1 pushbutton functionality

P72

F2 pushbutton functionality

P73

Page pushbutton functionality

P74

Home display second line content

P75

Home display third line content

P76

Level 2 passcode

P77

Configuration level passcode

rEc.S

Recovery point save

rEc.L

Recovery point load

PHAS

Calibration phase

Go

Calibration start

vAL

Calibration analogue output value

IPAType

Logic Input 1 channel hardware type (0 = None; 1 = Logic Inputs)

IPBType

Logic Input 2 channel hardware type (808 and 804 only) (0 = None; 1 = Logic Inputs)

CommsType

Digital Communications Module Type (0 = None; 1 = EIA485)

CTType

Current Transformer (0 = None; 1 = CT in)

OP1Type

IO channel 1 hardware type (0 = None; 1 = Relay; 2 = Logic I/O)

1.PLS

IO1 Time proportioning Output minimum pulse time

OP2Type

Output 2 Type (0 = None; 1 = Relay; 2 = Logic; 3 = DC OP [816 only]

2.PLS

Output 2 Time proportioning Output minimum pulse time

OP3Type

Output 3 Type (0 = None; 1 = Relay; 3 = DC OP [808 and 804 only])

3.PLS

Output 3 Time proportioning Output minimum pulse time

OP4Type

Output 4 Type (0 = None; 1 = Relay)