Fuji Electric PXZ Operating Manual

Download

Page 1

Model Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Outer Dimensions and Panel Cutout Size . . . . . . . . . . . . . . . . . . . . . . . . 5

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Wiring Instructions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Front Panel Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Front Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Autotuning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Programming

1. Primary Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2. Secondary Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Appendix A: Autotuning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Appendix B: Manual Tuning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Appendix C: Heater Break Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Appendix D: Heat/Cool Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Quick Reference. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

PXZ SERIES

Operation Manual

PID Autotune Controllers Featuring Fuzzy Logic

P X Z

Front panel size Code 1/16 DIN 4 1/8 DIN 5 72mm 7 1/4 DIN 9

Kinds of input Code Thermocouple (°C) T Thermocouple (°F) R RTD/Pt100 (°C) N RTD/Pt100 (°F) S 4-20mA DC, 1-5V DC B 0-20mA DC, 0-5V DC A

Control output 1 Code Relay contact (reverse action) A Relay contact (direct action) B SSR/SSC driver (reverse action) C SSR/SSC driver (direct action) D 4 to 20mA DC (reverse action) E 4 to 20mA DC (direct action) F

Control output 2* Code None Y Relay contact (reverse action) A Relay contact (direct action) B SSR/SSC driver (reverse action) C SSR/SSC driver (direct action) D 4 to 20mA DC (reverse action) E 4 to 20mA DC (direct action) F *not available on PXZ-4 type

Alarm Options Code Heater break alarm* 2 Process alarm & Heater break alarm* 3 None 4 Process alarm 5 *not available on PXZ-4, or with 4-20mA DC output

Power Supply Option Code 24V AC/DC Supply D

MODEL CONFIGURATION

ACCESSORIES (Sockets: only for PXZ-4 and sold separately)

____________________________________________________

8-pin sockets (for PXZ-4 without H / L Alarm Option) ATX1NS Solder Type Socket (UL) PG-08 Screw-down type (terminals on back) ATX2PSB Screw-down type socket (terminals on back) (UL) TP28X Screw-down type socket (terminals on front) (UL) 11-pin sockets (for PXZ-4 with H / L Alarm Option) PG-11 Screw-down type (terminals on back) TP311SB Screw-down type socket (terminals on back) TP311S Screw-down type socket (terminals on front)

Heater Break Current Sensing Transformer:

CTL-6-SF For heater current (1 to 30 amps) CTL-12-S36-8F For heater current (20 to 50 amps) ____________________________________________________

Free Technical Support:

1-800-235-8367 U.S. & Canada

802-863-0085 Int’l

8:30 A.M.- 6:00 P.M. E.S.T.

V4.98.5

Page 2

SAFETY PRECAUTIONS

Before using this product, the user is requested to read the following precautions carefully to ensure safety. The safety requirements are classified as either “warning” or “caution” according to the following explanations:

Warning

Wiring

1. If there is danger of serious accident resulting from a failure or defect in this unit, provide the unit with an appropriate external protective circuit to prevent an accident.

2. The unit is normally supplied without a power switch or a fuse. Use power switch and fuse as required (Rating of the fuse: 250V, 1A)

Power supply

1. Be sure to use the rated power supply voltage to protect the unit against damage and to prevent failure.

2. Keep the power off until all of the wiring is completed so that electric shock and trouble with the unit can be prevented.

General

1. Never attempt to disassemble, modify, or repair this unit. Tampering

with the unit may result in malfunction, electric shock, or fire.

2. Do not use the unit in combustible or explosive gaseous atmos-

pheres.

Caution

Installation

1. Avoid installing the unit in places where:

• the ambient temperature may reach beyond the range of -10 to 50°C (32 to 122°F) while in operation

• the ambient humidity may reach higher than 90% RH while in operation

• a change in the ambient temperature is so rapid as to cause condensation

• corrosive gases (sulfide and ammonia gas, in particular) or combustible gases are emitted

• the unit is subject to vibration or shock

• the unit is likely to come in contact with water, oil, chemicals, steam, or vapor

• the unit is exposed to dust, salt, or air containing iron particles

• the unit is subject to interference with static electricity, magnetism, or noise

• the unit is exposed to direct sunlight

• heat may be accumulated due to radiation

Maintenance

1. Do not use organic solvents such as alcohol or benzene to wipe this unit. Use a neutral detergent.

2. Three-year warranty is guaranteed only if the unit is properly used.

FEATURES

• Fuzzy Logic Control

• PID Autotune with manual override - heating or cooling

• Programmable control action - reverse or direct

• Programmable cycle time

• Programmable inputs - Thermocouple/RTD, or, Current/ and Voltage

• Sensor burn-out protection

• Input calibration by user

• Outputs: Relay, Solid-state relay drive, and 4-20mA DC

• Secondary output for cooling (optional)

• High/low alarm outputs (optional)

• Heater break alarm (optional) (only on PXZ-5, 7, 9)

• Menu driven format

• Setting – touch keys on front panel

• Programmable 8-segment ramp/soak function

• Digital filtering (to suppress factory noise)

• Adjustable setpoint range

• Selectable °F/°C

• Offset adjustments

• Programmable decimal point

• Programmable lock-up feature

• Advanced security options to prevent unauthorized parameter changes

• 4-digit, LED indication

• Output status indication

• Fault indication

• Non-volatile memory

• 1/16, 1/8, 1/4 DIN and 72mm panel mount package

• NEMA 4X faceplate

• ABS plastic housing

• Termination—screw-down type (PXZ-5, 7, 9) or socket with screwdown terminals (PXZ-4)

• Metal mounting bracket; plastic bracket for PXZ-4

• 85 to 264V AC free voltage power supply

• 24V AC/DC power supply (optional)

• UL, C-UL, and CE approvals

• 3-year warranty

INTRODUCTION

Thank you for purchasing the Fuji Electric PXZ controller. All of these controllers are PID Autotune controllers that employ Fuji Electric’s patented fuzzy logic algorithms.

It is a fully programmable temperature/process controller incorporating many user-friendly features. The following easy-to-use instructions are intended to help you understand, set up, effectively operate, and achieve optimal performance from your PXZ controller. When programmed and operated within the guidelines set up for them in this manual, your PXZ controller will give you years of precise, reliable control. If needed, we will provide free technical support throughout the life of the controller.

Warning

Caution

suggesting that the user's mishandling can result in personal death or serious injury.

suggesting that the user's mishandling can result in personal injury or damage to the property.

Page 3

SPECIFICATIONS

INPUT RANGE TABLE:

________________________________________________________ Input Signal Input Range Input Range Remarks

(°C) (°F)

________________________________________________________

Thermocouple

J 0~800 32~1472 Cold Junction K 0~1200 32~2192 compensating R 0~1600 32~2912 function built-in B 0~1800 32~3272 S 0~1600 32~2912 T -199~200 -328~392 T -150~400 -238~752 E -199~800 -328~1472 N 0~1300 32~2372 PL2 0~1300 32~2372

________________________________________________________

RTD

Pt100 -150~850 -238~1562 Allowable wiring

resistance 10 ohms max (per wire).

________________________________________________________

DC Voltage/ Current

1-5V Scaling Range: -1999 to 9999 For current input,

0-5V Engineering Units use the 250Ω

resistor to 4-20mA obtain 1-5V DC or 0-20mA 0-5V DC input.

________________________________________________________

CONTROL FUNCTION

(SINGLE OUTPUT) ________________________________________________________

Control action PID control with auto-tuning

Fuzzy control with auto-tuning

________________________________________________________ Proportional band (P) 0-999.9%, of full scale (FS), setting in 0.1% steps

________________________________________________________ Integral time (I) 0-3200 sec, setting in 1 sec steps

________________________________________________________ Differential time (D) 0-999.9 sec, setting in 0.1 sec steps

________________________________________________________ P,I,D = 0: 2-position action I,D = 0: Proportional action

________________________________________________________ Proportional cycle 1-150 sec, setting in 1 sec steps, for relay contact

output and SSR/SSC drive output only

________________________________________________________ Hysteresis width 0-50% FS, setting in 1 E.U. (Engineering Units)

steps, 2-position action only

________________________________________________________ Anti-reset wind up 0-100% FS, setting in 1 E.U. steps, auto-setting

with auto-tuning

________________________________________________________ Input sampling cycle 0.5 sec

________________________________________________________ Control cycle 0.5 sec

________________________________________________________

CONTROL FUNCTION

(DUAL OUTPUT) (Heat/Cool Type)

________________________________________________________ Heating Proportional band P x 1/2 (P= 0-999.9%)

________________________________________________________ Cooling Proportional band Heating proportional band

x Cooling proportional band coefficient Cooling proportional band coefficient= 0-100 0: 2-position action

________________________________________________________ Integral time 0-3200 sec for heating and cooling

________________________________________________________ Differential time 0-999.9 sec for heating and cooling

________________________________________________________ P,I,D= 0: 2-position action (without dead band) for heating and cooling I,D= 0: Proportional action

________________________________________________________ Proportional cycle 1-150 sec, for relay contact output and SSR/SSC

drive output only

________________________________________________________ Hysteresis width 2-position action for heating and cooling: 0.5% FS

2-position action for cooling: 0.5% FS

________________________________________________________ Anti-reset wind-up 0-100% FS, setting in 1 E.U. steps, auto setting

with auto-tuning

________________________________________________________ Overlap/dead band ±50% of heating proportional band

________________________________________________________ Input sampling cycle 0.5 sec

________________________________________________________ Control cycle 0.5 sec

________________________________________________________

OUTPUT

(Single Output)

________________________________________________________ Control output One of the following three types is selected:

(1) Relay contact (SPDT)

220V AC/30V DC, 3A (resistive load) Mechanical life: 10

times (under no load)

Electrical life: 10

times (under the rated load)

(2) SSR/SSC drive (voltage pulse):

15-30V DC at ON/0.5V DC or less at OFF.

Current 60mA or less.

(3) 4-20mA DC:

Allowable load resistance– 600Ω or less.

________________________________________________________

OUTPUT

(Dual Output)

________________________________________________________ Control output For dual output type, one of the following three

types is selected on both heating and cooling types: (Not available on PXZ-4 type) (1) Relay contact (SPDT):

220V AC/30V DC, 3A (resistive load)

(2) SSR/SSC drive (voltage pulse):

15-30V DC at ON/0.5V DC or less at OFF. Current: 60mA or less

(3) 4-20mA DC:

Allowable load resistance – 600Ω or less

(Note: When SSR/SSC drive output for heating/ cooling side is selected, the total current should be less than 60mA)

________________________________________________________

SETTING AND INDICATION

________________________________________________________ Parameter setting method PXZ: digital setting with eight keys

________________________________________________________ PV/SV display method PXZ-4: PV/SV red LED display, 4 digits

PXZ-5, 7, 9: PV/SV individual LED display, 4 digits each, PV= red, SV=green

________________________________________________________ Status display Control output, alarm output, heater break alarm

output.

Setting accuracy 0.1% FS ________________________________________________________

Indication accuracy Thermocouple: ± 0.5% FS ± 1 digit ± 1°C

(at 23°C) R thermocouple: 0-400°C; ± 1% FS ± 1 digit ± 1°C

B thermocouple: 0-500°C; ± 5% FS ± 1 digit ± 1°C RTD, voltage, current: ± 0.5% FS ± 1 digit

________________________________________________________

ALARM

________________________________________________________ Alarm output Relay contact (SPST),

220V AC/30V DC, 1A (resistive load) PXZ-4 type: 1 point Other types: 2 points

________________________________________________________ Heater break Relay contact (SPST), alarm output 220V AC/30V DC, 1A (resistive load)

PXZ-4 type: not available

________________________________________________________

Page 4

STRUCTURE

_______________________________________________________ Mounting method Panel flush mounting or surface mounting

Surface mounting: PXZ-4 type only

_______________________________________________________

External terminal PXZ-4 type: 8-pin or 11-pin socket

Other types: screw terminal (M3.5 screw)

_______________________________________________________ Enclosure Black ABS plastic

_______________________________________________________ Dimensions PXZ-4 48 x 48 x 85.7mm (1/16 DIN)

PXZ-5 52.5 x 100.5 x 95.8mm (1/8 DIN) PXZ-7 76.5 x 76.5 x 95.8mm (72 mm) PXZ-9 100.5 x 100.5 x 95.8mm (1/4 DIN)

_______________________________________________________ Weight PXZ-4 approx. 150g

PXZ-5 approx. 300g PXZ-7 approx. 300g PXZ-9 approx. 400g

_______________________________________________________

Protective structure Front panel water-proof structure;

NEMA 4X (equivalent to IEC standards IP66) Rear case: IEC IP20

_______________________________________________________

DELIVERY

_______________________________________________________ PXZ-4 type: controller, panel mounting bracket, socket (when specified),

water proof gasket, 250Ω precision resistor (when required), instruction

manual. Other types: controller, panel mounting bracket, water-proof gasket,

250Ω precision resistor (when required), instruction manual.

_______________________________________________________

GENERAL SPECIFICATIONS

_______________________________________________________ Rated voltage 85-264V AC or 24V AC/DC

_______________________________________________________ Power consumption 10VA or less (100V AC)

15VA or less (240V AC)

_______________________________________________________

Insulation resistance 50MΩ or more (500V DC)

_______________________________________________________ Withstand voltage Power source-Earth: 1500V AC, 1 min

Power source-input terminal: 1500V AC, 1 min Earth-relay output: 1500V AC, 1 min Earth-Alarm output: 1500V AC, 1 min Between other terminals: 500V AC, 1 min

_______________________________________________________

Input impedance Thermocouple: 1MΩ or more

Voltage: 450KΩor more Current: 250Ω (external resistor)

_______________________________________________________

Allowable signal Thermocouple: 100Ω or less source resistance Voltage: 1KΩ or less

_______________________________________________________

Allowable wiring RTD: 10Ω or less per wire

resistance _______________________________________________________

Reference junction ± 1 °C (at 23°C) compensation accuracy

_______________________________________________________ Process variable offset ±10% FS

_______________________________________________________ Setpoint variable offset ± 50% FS

_______________________________________________________ Input filter 0-900.0 sec, setting in 0.1 sec steps

(primary lagging filter)

_______________________________________________________ Noise rejection ratio Normal mode noise (50/60Hz): 50dB or more

Common mode noise (50/60Hz): 140dB or more

_______________________________________________________

POWER FAILURE PROTECTION

_______________________________________________________ Memory protection: Non-volatile memory. Parameter values

remain unchanged with disruption of power. Ramp/soak function has to be re-initiated.

_______________________________________________________

SELF-CHECK

_______________________________________________________ Method: Watchdog timer monitors program error.

_______________________________________________________

OPERATION AND STORAGE CONDITIONS

_______________________________________________________ Operating temperature -10 to 50°C (14 to 122°F)

_______________________________________________________ Operating humidity 90% RH or less (non-condensing)

_______________________________________________________ Storage temperature -20 to 60°C (-4 to 140°F)

_______________________________________________________ Installation category II

_______________________________________________________ Pollution degree 2

_______________________________________________________

OTHER FUNCTIONS

_______________________________________________________ Parameter mask function Parameter display is disabled by software

_______________________________________________________ Ramp soak function 4-ramp/4-soak

_______________________________________________________

Page 5

PXZ 5,7,9

95.8

C2 H HBL

PXZ-

SEL DATA ENTSV

16.2

18.7

Panel

Gasket

Model

PXZ5 PXZ7 PXZ9

52.5

76.5

100.5

76.5

100.5

90.5

114.5 91

114.5

45 68 92

0.6

-0

0.7

-0

0.8

-0

92 68 92

0.8

-0

0.7

-0

0.8

-0

120Min.

96Min.

120Min.

92Min.

116Min.

140Min.

Unit: mm Panel thickness: 1 to 8 mm

Panel cutout size: when installing “n” numbers of units.

OUTER DIMENSIONS AND PANEL CUTOUT SIZE

PXZ 4

Mounting bracket

Panel cutout size: when installing “n” numbers of units.

63 or more

45 -0

0.5

45 -0

0.5

Unit: mm Panel thickness: 1 to 8 mm

Gasket

NEMA 4X Integrity

The front side of this instrument conforms to NEMA 4X. To ensure the waterproofness between the instrument and the panel, use the gasket that is provided with the unit according to the installation procedure described below.

How to install the unit

For PXZ-5/7/9, install the two metal brackets, one on the top and the other on the bottom, and tighten the screws to a torque of about 14.7Ncm (1.5kg-cm). For PXZ4, install the unit in the panel as shown below, and tighten the screws on the mounting bracket until the unit is secure. Make sure there is no space between the front side of the unit and the gasket, and between the gasket and the panel.

Figure 1 Figure 2

Unit

Front Gasket Case

Unit

Panel Panel Mounting bracket Screw

Caution: After the mounting bracket is installed, check the gasket for displacement and detachment as shown in Figure 3.

INSTALLATION

CPVH L

SEL DATA ENTPV/SV

PXZ-4

Gasket

Panel

71.5

85.7

9.5

44.8

Gasket Gasket

Case Case

(Bad) (Good)

Figure 3

Page 6

Wiring Power to Controllers

• Be sure to use the rated power supply voltage and polarity for the unit to protect it against damage and to prevent the occurrence of failure.

• Keep the power off until all of the wiring is completed to prevent electric shock and abnormal operation.

• Keep the power supply wires separated from the input and output wires.

• Power connections should be made with 18-gauge or larger insulated wire. Stranded wire improves noise immunity. Noise filters and isolation transformers are recommended in case of noisy power lines.

• When the Heater Break option is selected, use the same power line for both the controller and the heater.

Wiring Inputs

There are two input categories available: Thermocouple/RTD or current/voltage. Make sure you have the right type before wiring the inputs. Refer to Table of Input Type Codes and set the parameter “P-n2” accordingly.

Note: In order to minimize the risk of high frequency noise induced by coils and windings in relays, solenoids, and transformers, use leads which have braided sheath and ground one end of the sheath. Keep your input leads separate from power and output leads. If you have to bring the input signal from a long distance, a signal transmitter might be needed to maintain an accurate reading; in this case, a unit

WIRING INSTRUCTIONS

Be sure to use the rated power supply voltage and polarity

PXZ4 socket type (with alarm)

11 ~

–

B B

–

Current output, SSR/SSC driving output

Contact output

*Voltage/

current

Alarm output

Thermocouple input

Power supply

When alarms are provided

(viewing from the back of instrument)

– +

RTD

* For current input, install the 250Ω precision

resistor (accessory) before using the unit.

that accepts current/voltage input would be necessary.

Thermocouple

• Connect thermocouples directly to the input terminals whenever possible.

• If using extension wires, make sure they are of the same thermocouple material and grade; any dissimilar metal junctions will lead to erroneous readings.

• Ungrounded thermocouples are recommended for optimal performance and to prevent ground loops.

• Make sure the polarity is correct.

RTD Pt100

• Use a 3-wire Pt100Ω RTD whenever possible. All three wires must have low lead resistance (less than 10Ω) and no resistance differentials among them.

• If using a 2-wire RTD, jumper the two B-legs with a wire of equal resistance.

• Make sure A and B leads are connected to the right terminals.

Current/Voltage

• The controller accepts 1-5V, 0-5V, 4-20mA, and 0-20mA DC signals. If wiring for a voltage input, feed the signal directly to the input terminals. For current inputs, first connect the 250Ω precision resistor that comes with the unit.

• Make sure the polarity is correct.

(viewing from the back of instrument)

–

Contact output

Power supply

PXZ4 socket type (standard)

Current output, SSR/SSC driving output

*Voltage/current

RTD

–

When no alarms are provided

Thermocouple input

PXZ7

Current output, SSR/SSC driving output

Control output 1

–

Power supply

PXZ5, PXZ9

*Voltage/

Current input

RTD

–

1 2 3

4 5 6

T.C.

7 8 9

10 11 12

Control output 2(on the cooling side)

1012

–

Alarm 1 (Upper limit alarm)

Alarm 2

(Lower limit alarm)

Heater break alarm output

Common

CT input

Current output, SSR/SSC driving output

250Ω

–

*Voltage/

Current

input

Current output SSR/SSC driving output

Control output 1

Power supply

T.C.

RTD

–

1 2 3 4 5 6 7 8 9

Current output, SSR/SSC driving output

10 11 12 13 14 15 16 17 18

Control output 2 (on the cooling side)

–

Alarm 1 (upper limit alarm) Alarm 2 (lower limit alarm) Heater break alarm output Common

CT input

Page 7

Wiring Outputs

Before wiring the outputs, make sure the unit has the right kind of control output, and that all the load handling devices conform to the controller specifications. Note that it takes 5 seconds for the outputs to activate after the power is turned on. Refer to parameter “P-n1” and to the Table of Output Type Codes to choose the preferred type of control action– reverse acting or direct acting. If using two outputs in a heat/cool type control, please refer to Appendix D for more details.

Relay

• Connecting a load to full capacity of the relay will shorten the relay life, especially if it is operated at a rapid rate. To protect the output relay, an external relay or a contactor should be used. If a higher current rating is required, a solid-state relay driver type output is recommended.

• Connect the load between the normally opened contacts of the relay.This way, if power to the controller is disrupted, the output circuit would open, preventing the load from running out of control.

• Set the proportional time cycle parameter, “TC” to 30 secs. or more.

• Use of “Z-trap” (manufacturer: Fuji Electric Co.) is recommended to protect the relay against switching surges and to ensure the product’s long life. Connect it between the contacts of the relay as shown in the example.

Part No.: ENC241D-05A

(power supply voltage: 100V)

ENC471D-05A (power supply voltage: 200V)

SSR/SSC Driver (Pulsed DC Voltage)

• The non-isolated DC output is used to drive an external load-handling device such as Solid-State Relay(SSR) or Solid-State Contactor(SSC).

• The total current drawn, for both single and dual outputs, should be within the allowed value.

• Make sure the polarity is correct.

• Set the proportional time cycle parameter, “TC” to 1 sec. or more.

4 to 20mA DC

• The output is a non-isolated analog signal used to drive a variety of output devices such as SCRs and valve actuators.

• The load resistance must be less than 600Ω.

• Make sure the polarity is correct.

• The proportional time cycle parameter, “TC” is set to 0, and is not displayed on the programming menu.

Wiring Alarms

• Make sure the load does not exceed the rated capacity of the relay.

• Several types of alarm configurations can be programmed and does not require a change in the wiring. Refer to parameters AL, AH, P- AH, P-AL, P-An.

• For details on Heater Break alarm, please refer to Appendix D and the Heater Break Alarm Setpoint parameter “Hb” in the programming section.

6543

5 6 7 8 9

PXZ4 (8-pin)

PXZ9

System Wiring Diagram

Example:

120V AC

PXZ4-RAY1-4V

Fuse

Heater (3A or less)

–

Thermocouple

Input

Contact

Output

Fuse

Power

85 to 264 VAC

50/60Hz

Page 8

FRONT PANEL DESCRIPTION

Name Function

1 Process Value (PV) display Displays the process value (PV). 2 Set value (SV) indication lamp Stays on while a set value is on the display. 3 Set value (SV) and Set value (SV) or parameter symbols and codes

parameter display are displayed when setting various parameters.

4 DOWN key Decrements the numerical value in the place

(common for each digit) selected with the UP key. Where various para-

meters are displayed, each parameter is displayed one by one every time this key is pressed. The sequence of displays however, is opposite to the sequence of displays with the SEL key.

5 Direct SV key By pressing this key, the set value (SV) is dis-

played.

6 SELECT key The key to be used when switching over to the

1st or 2nd block parameters, or when scrolling through the parameters within a block.

7 Data display key Displays the data assigned to the parameter

selected with the SEL key

8 Data entry key The key to be used for storing the data after pre-

vious data is changed. (none of changed data can be registered unless this key is pressed.)

9 UP key for 1’s place By pressing once, the number in the units place

blinks. The number is continuously incremented with the key held pressed.

10 UP key for 10’s place By pressing once, the number in the tens place

blinks. The number is continuously incremented with the key held pressed.

11 Up key for 100’s place By pressing once, the number in the hundreds

place blinks. The number is continuously incremented with the key held pressed. A numeric “9” is followed by “0” and , concurrently, a number of the thousands place is incremented by 1.

12 Control output indication lamp C (for PXZ4 only): Comes on when the control out-

put is ON. C1: Comes on when the control output 1 is ON. C2: Comes on when the control output 2 is ON.

13 Upper limit alarm Comes on when the upper limit alarm is activated.

indication lamp (option)

14 Lower limit alarm Comes on when the lower limit alarm is activated.

indication lamp

15 Heater break alarm Comes on when the heater break alarm is output.

indication lamp

16 Process value (PV)/ set Parameter symbols and codes are displayed

value (SV)/parameter display for process value (PV) and set value (SV) and (applicable to PXZ4 only) when setting various parameters.

17 Process value (PV) Stays on while process value (PV) is on display.

indication lamp

18 PV/SV SELECT key The display of measured value (PV) and set value

(For PXZ4 only) (SV) is toggled each time this key is pressed.

FRONT PANEL OPERATION

The PXZ controller programming menu consists of two blocks— PRIMARY (SETPOINT) MENU and SECONDARY (SYSTEM) MENU. At power up, the controller will be in the operational mode– process variable (PV), in the case of PXZ4, and both process variable and setpoint variable (SV), in the case of PXZ-5, 7, 9 will be displayed. PV is the variable that is being controlled, and it is not programmable. When setting the parameters, turn off the power to the load (operating equipment) to ensure safety. Since it takes 30 minutes for the unit to stabilize in terms of temperature, all measurements should be carried out at least 30 minutes after the power is turned on. Option-related features are displayed only when the options are provided.

Viewing and Setting Parameters

• After setting the data, press ENT key for registration.

• If the data setting is left as it is for 30 secs, the display is automatically returned to the operational mode.

How to set Setpoint value (SV) Operation Display

1. Power on – Operational mode

2. Press UP (units, tens or hundreds) – Digit blinks key to select digit

3. Press the appropriate UP key or – SV value changes the DOWN key to increment or decrement digit value

4. Press ENT key – SV value registered

PRIMARY (SETPOINT) MENU Operation Display

1. Operational mode – PV, SV

2. Press SEL key – “P” displayed

3. Press DATA key – “P” data displayed

4. Press the appropriate UP key – Corresponding digit blinks

once

5. Press the same UP key or the – Data changes accordingly

DOWN key to increment or decrement the data

6. Press ENT key – Data registered; “i” displayed

7. Press SEL key once to go to – “d” ....... “Mod”

the next parameter, or press and hold UP (hundreds) key or DOWN key to scroll down or up the menu at a faster rate

8. Press SV (SV/PV for PXZ4) key – Operational mode

SECONDARY (SYSTEM) MENU Operation Display

1. Operational mode – PV, SV

2. Press SEL key for about 3 secs – “P-n1”

3. Press DATA key – “P-n1” data

4. Proceed as described before.

1413

1 3 2

4 5

C1 C2 H L HB

PV SV

DATASEL

ENTSV

PXZ-5

Model : PXZ5

1 2

7 8

Model : PXZ7, 9

151312

C2 H HBL

3 10

SEL DATA ENTSV

PXZ-7

CPVH L

11 4

SEL DATA ENTPV/SV

Model : PXZ4

PXZ-4

Page 9

AUTOTUNING

Before initiating the autotune function, first decide if you would like to autotune at setpoint or 10% of full scale below setpoint. Set the setpoint (SV), alarms (AL, AH) and the cycle time (TC). Bring your process near setpoint before starting the autotune procedure.

Set the parameter AT to either “1”(to autotune at setpoint) or “2” (to autotune at 10% of full scale below setpoint) and press ENT key to start auto-tuning. The point indicator at lower right will then start blinking. When the auto-tuning is completed, the point indicator stops blinking and the parameter AT will automatically be set to “0.”

Duration of the autotune process varies with every application. The auto-tuning process may take between 1 and 30 minutes to complete. If it fails to complete, an abnormality may be suspected. In this case, recheck the wiring, control action, and input type code. Refer to page 16 and Appendix A for additional details.

The PID parameters calculated by autotuning will be retained even if the power is lost. However, if the power is turned off during the autotuning process, you must restart autotuning. To abort the autotune procedure, set AT to “0.” Auto-tuning has to be repeated if there is a significant change in SV, P-SL or P-SU, or in the controlled process. Autotuning can also be performed while fuzzy control is selected.

TEMP

Setpoint

Proportional

Action

Integral

Action

Derivative

Action

TIME

PRIMARY MENU SETTINGS

PARAMETER DESCRIPTION

- SV Main Setpoint Variable: The main setpoint variable is

the control point you wish to maintain. The main setpoint variable is set within the input range, between the (P-SL) and the (P-SU) settings.

ProG Ramp/Soak Command: The Ramp/Soak program auto-

matically changes the setpoint value with time in accordance with a preset pattern. ProG switches the operation modes. Setting: oFF : Normal operation is performed

rUn : Ramp/Soak operation is performed hLd : Ramp/Soak operation is suspended

P Proportional Band: The proportional band is that area

around main setpoint where the control output is neither fully on nor fully off. Setting range: 0.0 to 999.9% of full scale For On/Off control, set to “0”

I Integral Time (reset): The Integral Time is the speed at

which a corrective increase or decrease in output is made to compensate for offset which usually accompanies proportional only processes. The more Integral Time entered, the slower the action. The less Integral Time entered, the faster the action. Enter as little Integral Time as necessary to eliminate offset without overcompensating resulting in process oscillation. Setting Range: 0 to 3200 secs Integral Action is turned off when set to “0”

d Derivative Time (Rate): The Derivative Time is that time

used in calculating rate of change and thermal lag in helping eliminate overshoot which results in response to process upsets. This overshoot usually accompanies proportional only and proportional-integral processes. The derivative action dampens proportional and integral action as it anticipates where the process should be. The more Derivative Time entered, the more damping action. The less Derivative Time entered, the less damping action. Enter as much Derivative Time as necessary to eliminate overshoot without over-damping the process resulting in process oscillation. Setting Range: 0 to 999.9 secs Derivative Action is disabled when set to “0”

Page 10

HYS Hysteresis: The Hysteresis is that area around the main

setpoint where the output does not change condition. That area or deadband is intended to eliminate relay chatter at setpoint for On/Off control applications. The wider the Hysteresis, the longer it takes for the controller to change output condition. The narrower the Hysteresis, the less time the controller takes to change output condition. When the Hysteresis is narrow, the On/Off control is more accurate but the wear on the output relay is increased. Enter a value which is small enough to meet the control tolerance of the application but large enough to eliminate relay chatter. Setting range: 0 to 50% of full scale, set in E.U. Hysteresis for On/Off action on dual outputs (heating and cooling) is fixed at 0.5% of full scale.

Hb Heater Break Alarm Setpoint: If the heater’s operating

current falls below this setpoint, the heater break alarm output relay is energized. This option is used in cases where the PXZ is controlling a bank of heaters wired in parallel. A current transformer around the hot lead going to the heater bank and connected to the controller is tied with the controller’s output and senses the current used by the heater bank. If one or more of the zones burnout, resulting in cold spots, the current used by the defective heater bank is reduced. By determining what the optimal current and the optimal current minus one zone for the heater bank is, the Heater Break Alarm setpoint can be calculated and entered. Setting Range: 0 to 50 amps. Not indicated without the Heater Break Alarm output option. Not available on PXZ4, or with 4-20 mA DC outputs. Detection is made only on a single-phase heater. This function cannot be used when controlling a heater with SCR phase-angle control. Cycle Time, “TC,” must be set at 6 secs. or higher Refer to Appendix C for more details.

AL Low Alarm Setpoint: The Low Alarm Setpoint is that

point of the process below which, the low alarm output relay is energized. If the alarm type, programmed in the secondary menu, includes an absolute value for the Low Alarm Setpoint, enter the actual value you want the alarm to be activated at regardless of what the main setpoint is set for. If the alarm type includes a deviation value for the Low Alarm Setpoint, enter the number of units below main setpoint in which you want the alarm to be activated at; the deviation alarm tracks main setpoint. Settable within the Input Range. Not indicated without the alarm option.

AH High Alarm Setpoint: The High Alarm Setpoint is that

point of the process above which, the high alarm output relay is energized. If the alarm type, programmed in the secondary menu, includes an absolute value for the High Alarm Setpoint, enter the actual value you want the alarm to be activated at regardless of what the main setpoint is set for. If the alarm type includes a deviation value for the High Alarm Setpoint, enter the number of units above main setpoint in which you want the alarm to be activated at; the deviation alarm tracks main setpoint. Settable within the Input Range. Not indicated without the alarm option.

TC Cycle Time (Output #1): The Cycle Time for output #1 is

that time where the output is on for a percentage of that time and off for a percentage of that time, creating a proportioning effect. The Cycle Time is only used when the PXZ is used as a P, PI, PD, or PID controller and when the output is time proportional as with the relay or SSR/SSC drive outputs. The shorter the Cycle Time, the higher the proportioning resolution is, and better is the control, but there will be an increased strain on the output device. Enter a value that is based on the limitations of your controller’s output type. Setting range: 1 to 150 secs. For relay output: Set to 30 secs or more For SSR/SSC drive output: Set to 1 sec or more For current output: Set to 0. (normally not indicated).

20 sec. Cycle Time

25% Output

ON OFF

20 sec. Cycle Time

75% Output

ON OFF

30 sec. Cycle Time

25% Output

ON OFF

30 sec. Cycle Time

75% Output

ON OFF

10 sec.

25%

OFF

10 sec.

75%

OFF

Output ON

Output OFF

Setpoints

Narrow

Hystersis

Wide

Hystersis

Optimal Current of

Heater Bank

minus

Optimal Current of

Heater Bank

less One Zone

Optimal Current of

Heater Bank

less One Zone

Heater

Break Alarm

Setpoint

Page 11

AT Autotuning: Autotuning is the automatic calculation

and

entering of the control parameters (P, I and D) into memory. The PXZ will autotune both reverse and direct acting control applications. Autotuning will also automatically set anti-reset wind-up (Ar). There are two types of Autotuning that can be performed by the controller, Autotuning at main setpoint or Autotuning at 10% of full scale below main setpoint. Autotuning at 10% of full scale below main setpoint may yield slightly different values, not as precise, but the process overshoot encountered during the autotuning procedure would not be as great. Enter the value for the type of autotuning you would like to run on your particular application based on overshoot tolerances and the precision of the PID parameters needed. For more information on principles of Autotuning, refer to Appendix A. See also page

9. Setting: 0 - Autotuning off 1 - Autotuning performed at setpoint 2 - Autotuning performed at 10% of full scale

below setpoint

TC-2 Cycle Time (Output #2) The Cycle Time for output #2 is

that time where the output is on for a percentage of that time and off for a percentage of that time, creating a proportioning effect. Output #2 is the cooling side of a heat/cool PXZ controller. A shorter cycle time provides higher proportioning resolution and better control but causes increased strain on the output device. Enter a value that is based on the limitations of your controller’s output type. Setting Range: 1 to 150 secs. For relay output: Set to 30 secs or more For SSR/SSC drive output: Set to 1 sec or more For current output: Set to 0 (normally not indicated). Not indicated without the control output #2 option.

CooL Proportional Band Coefficient for Cooling: The

Proportional Band Coefficient for Cooling is a multiplier for the proportional band on the cooling side of a heat/cool PXZ controller. It varies the width of the proportional band on the cooling side. A large value would establish a larger proportional band for more powerful cooling loads. A small value would establish a smaller proportional band for less powerful cooling loads. Enter a value based on the power of your cooling load.

Setting Range: 0.0 to 100.0 Not indicated without control output #2 option. Set to “0” for On/Off control.

Start of AT End of AT

AT in operation

Set value (SV)

100%

ON-OFF action

OFFONOFF

(Measured value)

PID control

Start of AT End of AT

AT in operation

Set value (SV)

100%

ON-OFF action

OFF

PID control

SV-10%FS

(Control output)

(Measured value)

Standard type (AT=1)

Low PV type (AT=2)

Prop. Band for Heating X Input Range =

Prop. Band for Cooling X Input Range =

Deadband/Overlap X Input Range =

200%

Proportional Band

db Deadband/Overlap: The Deadband/Overlap is that per-

centage of the heating side of the proportional band where the heating (output #1) and the cooling (output #2) outputs are separated by a Deadband or where they Overlap on a heat/cool PXZ controller. A value greater than zero establishes a Deadband or area where neither the heating nor cooling outputs are energized for more powerful heating and cooling loads. A value less than zero establishes an Overlap or area where both the heating and cooling outputs are energized at the same time for less powerful heating and cooling loads. Enter a value based on the power of your heating and cooling loads as well as the application’s efficiency in maintaining tight heat/cool control. Setting range: -50.0 to 50.0% of the heating proportional band. Not indicated without control output #2 option

bAL Balance: Balance is used to pre-position the propor-

tional band with respect to setpoint. With Balance (MV Offset) set at 50% the proportional band will be centered around setpoint. To move the band left or right, decrease or increase the balance setting respectively. Setting range: 0-100%

Ar Anti-Reset Wind-up: Anti-Reset is used to limit the

range where integration occurs. This helps in stabilizing a system. With Anti-Reset at 100%, integration will occur throughout the proportional band. With AntiReset set to 90%, integration will occur at 90% of the band above the setpoint and 90% of the band below the setpoint. Autotuning automatically sets Ar. Setting range: 0-100% of full scale, set in E.U.

Prop. Band for Heating X Input Range

100%

# of units in the = Proportional Band for Heating

Prop. Band for Cooling X Input Range

100%

# of units in the = Proportional Band for Cooling

Deadband/Overlap X Input Range

100%

# of units in the = Deadband/Overlap

Input Range= ( minus )

100%

OUTPUT

Heating Side

Coolng Side

100%

OUTPUT

Heating Side

Coolng Side

Setpoint TEMP

100%

OUTPUT

Heating Side

Coolng Side

Setpoint TEMP

Overlap

Deadband

<1 =1

Deadband/Overlap

Page 12

LoC Lock-out: This function enables or disables changing

the settings of parameters. Code: 0 - All parameter settings are changeable 1 - All parameter settings are locked; cannot be changed 2 - Only the main setpoint can be changed; all other parameter settings are locked and cannot be changed.

STAT Ramp/Soak Status: The Ramp/Soak program automati-

cally changes the setpoint value with time in accordance with a preset pattern, as shown in the figure below. This device allows a maximum of four ramp and four soak segments. Ramp is the region in which SV changes toward the target value. Soak is the region in which the target value is maintained. STAT displays the current ramp/soak status. No setting can be made. oFF: Not in operation 1-rP – 4-rP: Executing 1st – 4th ramp 1-St – 4-St: Executing 1st – 4th soak End: End of program

SV-1 Ramp Target Value: Sets the target value for each ramp

to to segment.

SV-4 Setting range: 0-100% of full scale

TM1r Ramp Segment Time: Sets the duration of each ramp

to to segment.

TM4r Setting range: 00.00 to 99hrs 59mins.

TM1S Soak Segment Time: Sets the duration of each soak

to to segment.

TM4S Setting range: 00.00 to 99hrs 59mins.

Mod Ramp/Soak Mode: Up to 16 different modes of

ramp/soak operations are possible. Choose the appropriate code from the Table of Ramp/Soak Modes. Setting: 0-15

Time

Fourth Soak

Fourth

Ramp

Third soak

Second soak

First soak

First ramp

Second

ramp

Third ramp

TM1R TM1S TM2R TM2S TM3R TM3S TM4R TM4S

Set Value

SV3

SV2

SV1

SV4

Ramp: Region in which the setpoint changes toward the target value. Soak: Region in which the setpoint stays unchanged at the target value.

Note 1: SV cannot be changed while the operation is running or suspended. Note 2: The use of fuzzy control is inhibited while Ramp-Soak operation is being

performed.

MOD Power on start Output on END Output on OFF Repeat function

0 No Going on control Going on control No 1 No Going on control Going on control Yes 2 No Going on control Stand-by mode No 3 No Going on control Stand-by mode Yes 4 No Stand-by mode Going on control No 5 No Stand-by mode Going on control Yes 6 No Stand-by mode Stand-by mode No 7 No Stand-by mode Stand-by mode Yes 8 Yes Going on control Going on control No

9 Yes Going on control Going on control Yes 10 Yes Going on control Stand-by mode No 11 Yes Going on control Stand-by mode Yes 12 Yes Stand-by mode Going on control No 13 Yes Stand-by mode Going on control Yes 14 Yes Stand-by mode Stand-by mode No 15 Yes Stand-by mode Stand-by mode Yes

1. Power on Start: Program starts from the current PV value. In non-power-on-start the program starts from the main SV value.

2. Output on END: Output condition at the end of the program (ProG=End)

3. Output on OFF: Output condition when program is terminated (ProG=oFF)

4. Repeat function: Ramp-soak program operates repeatedly. If the repeat function is off, the SV value on the last step is maintained.

Stand-by mode: Output -3%, Alarm off. Going on Control: When program ends (End), control is at the SV value

on the last step. When program is terminated (oFF), control is at the main SV value.

Table of Ramp/Soak Modes

Page 13

SECONDARY MENU SETTINGS

P-n1 Control Action & Sensor Burn-out Protection: The

Control Action is the direction of the output relative to the process variable. The PXZ can be programmed as either a reverse or direct acting controller. As a reverse acting controller, the PXZ’s output decreases as the process variable increases. A heating application would require reverse acting control. As a direct acting controller, the PXZ’s output increases as the process variable increases. A cooling application would require direct acting control. Enter the code from the Table of Output Type Codes which establishes the PXZ as either a reverse or direct acting controller.

The Sensor Burn-out Protection is the intended direction of the output in the event of a thermocouple or RTD sensor break, or a break in the analog input. The PXZ can be programmed with either upper-limit or lowerlimit burn-out direction. With Upper-limit Burn-out, a 100% output will be delivered in the event of a sensor burn-out. With Lower-limit Burn-out, 0% output will be delivered in the event of a sensor burn-out. Enter the appropriate code from the Table of Output Type Codes.

Refer to Error Messages on page 15 for more details.

P-n2 Input type: The Input Type is the type of sensor to be

used with the PXZ controller in sensing the process variable. The Input Type must be correctly programmed into the controller in order for the controller to perform with the selected sensor type. Depending on the type of sensor to be used, the PXZ comes in two models. One model accepts J, K, R, B, S, T, E, N thermocouples and RTDs (Pt100). The other model accepts 1-5/0-5V DC and 4-20/0-20mA DC signals. The current/voltage model comes with a 250Ω precision resistor. Wired directly to the controller, it would convert a current signal into a voltage signal. There is no need to use the resistor if a voltage signal is applied directly. After the appropriate physical changes have been made, the controller still needs the correct code for the Input Type to be used. Enter the appropriate code.

Table of Output Type Codes

P-dF Input Filter Constant: The Input Filter is used to filter

out the quick changes that occur to the process variable in a dynamic or quick responding application which makes the PXZ control erratically. By slowing down the response time, the PXZ controller averages out the peaks and valleys of a dynamic system which, in turn, stabilizes the control. The Digital Filter also aids the PXZ in controlling processes where the electrical noise is affecting the input signal. The larger the value entered, the more filter added and the slower the controller reacts to process variable changes. The smaller the value entered, the less filter added and the quicker the controller reacts to process variable changes. Enter as small a value as possible at which the PXZ maintains accurate and stable control. Setting range: 0.0-900.0 secs

P-SL Lower Limit of Input Range: P-SU Upper Limit of Input Range: The Lower Limit and the

Upper Limit of Input Range establish the desired high and low limit for the type of input used. The Lower limit must be greater than or equal to the input type’s lower limit, while the Upper Limit must be less than or equal to the input type’s upper limit. Setpoint settings are restricted to values between P-SL and P-SU. Parameter values that are calculated as a percentage of full scale are affected by these settings. An underscale or an overscale error is indicated if the process value goes below or above the range by 5% of full scale. The primary purpose of these parameters when used with thermocouple or RTD inputs is to limit setpoint settings. When an analog input is used, the signal is scaled for the engineering unit range selected. For example, when a 4-20 mA input is used, the value of P-SL corresponds to 4mA and the value of P-SU corresponds to 20 mA. The engineering unit range could be %, PSI, pH, or any range which can be scaled between -1999 and 9999 units. Refer to the Table of Input Type Codes above to determine the measuring range for a particular input type.

RTD (IEC)

Thermocouple

DC current/ voltage

Pt100Ω Pt100Ω Pt100Ω Pt100Ω Pt100Ω Pt100Ω Pt100Ω Pt100Ω

J J K K K R B S T T E E N

PL-I I

0-20mA/ 0-5V 4-20mA/ 1-5V

0 to 150 0 to 300 0 to 500 0 to 600

-50 to 100

-100 to 200

-150 to 600

-150 to 850 0 to 400

0 to 800 0 to 400 0 to 800

0 to 1200 0 to 1600 0 to 1800 0 to 1600

-199 to 200

-150 to 400

-0 to 800

-199 to 800

0 to 1300 0 to 1300

Range of

measurement

(°C)

32 to 302 32 to 572 32 to 932

32 to 1112

-58 to 212

-148 to 392

-238 to 1112

-238 to 1562 32 to 752

32 to 1472

32 to 752

32 to 1472 32 to 2192 32 to 2912 32 to 3272 32 to 2912

-328 to 392

-238 to 752 32 to 1472

-328 to 1472

-32 to 2372 32 to 2372

Range of

measurement

(°F)

O O O O O O O X

O O O O X X X X O O O O X

With

decimal

point (°C)

O O O X O O X X

O X O X X X X X X X X X X

With

decimal

point (°F)

-1999 to 9999

(Scaling is possible)

X =Disabled

O= Enabled

2 2 3 3 3 4 5 6 7 7 8 8

12 13

1 1 1 1 1 1 1

15 16

Input Signal

Code

Table of Input Type Codes

Code

Output type

0 1

Single

2 3 4 5 6 7 8

9 10 11

Dual

12 13 14 15 16 17 18 19

Output 1

Control action

Output 2

Reverse action

Direct action

Reverse action

Direct action

Reverse action

Direct action

Burn-out direction

Output 1

Lower limit Upper limit

---

Lower limit Upper limit Lower limit Upper limit Lower limit Upper limit Lower limit Upper limit Lower limit Upper limit Lower limit Upper limit Lower limit Upper limit Lower limit Upper limit Lower limit Upper limit

Output 2

---

Lower limit

Upper limit

Lower limit

Upper limit

Lower limit

Upper limit

Lower limit

Upper limit

Page 14

P-An Alarm Hysteresis: The Alarm Hysteresis is that area

on one side of the alarm setpoint where the output does not change condition. That area or deadband is intended to eliminate relay chatter at alarm setpoint with less wear on the relay. With a wide Alarm Hysteresis, the controller takes a longer time to change output condition. With a narrow Alarm Hysteresis, the controller takes a short time to change output condition. Enter a value which is just large enough to eliminate relay chatter. Setting Range: 0 to 50% of full scale, set in E.U.

P-dP Decimal Point Position (Resolution): The Decimal

Point Position is the resolution at which the PXZ controller displays the process variable and other parameter values. The PXZ can indicate integers, tenths or hundredths of a unit. The Decimal Point Position does not increase the accuracy of the controller, it only increases the resolution. For a thermocouple, integers are usually sufficient due to the accuracy rating and the programmed input range. For a RTD (Pt100), integers or tenths of a degree may be entered, because of the increased accuracy of these sensors, depending on the programmed input range. For a 1-5/0-5V DC or 4-20/0-20mA DC signal, integers, tenths or hundredths of a unit may be entered depending on the pro-

P-AL Alarm Type 2: P-AH Alarm Type 1: This function sets the control action for

the optional alarm output relays. The PXZ5, 7, and 9 comes with two relays while the PXZ4 comes with one. They can be programmed for absolute, deviation, combination, or zone alarm configuration. The high and low alarm setpoints are set with primary menu parameters AH and AL. The absolute alarm configurations are independent of main setpoint. The alarm output relays are energized when the process variable exceeds the alarm setpoint, an absolute value. The deviation alarm configuration is main setpoint tracking. The alarm output relays are energized when the process variable exceeds the main setpoint by a deviation value set by AL or AH. The combination alarm configurations are a mixture of both the deviation and absolute value settings for the high and low alarms. With zone alarm configurations the alarm output is energized between the range set by AL and AH. One of the alarm types is Alarm with Hold. In this case the alarm is not turned on the first time the measured value is in the alarm band. Instead it turns on only when the measured value goes out of the band and enters it again. This type is useful when using deviation alarm with step type input. Enter the code for P-AH and P-AL from the Table of Alarm Action Type Codes.

Note 1: A change of alarm action type can cause the alarm set value to change, but this is not a malfunction. Note 2: After the alarm type is changed, turn off the power to the unit once.

SCALING THERMOCOUPLE AND RTD(Pt100) INPUT RANGES

Table of Alarm Action Type Codes

Example:

Program a J thermocouple for 50 to 500°F

Input Type

J Thermocouple

Program to 50 to 500

Full Range = (500-50) = 450 F

27.5 50 500 522.5 5% 5%

SCALING DC CURRENT/VOLTAGE INPUT RANGES

Program a 4-20mA DC signal for 0 to 100 E.U.

Example:

Input Type 4-20mA DC

Program to 0 to 100

Full Range = (100-0) = 100 Engineering Units

-5 0 100 105 5% 5%

Minimum/Maximum Range

32 . . . . . . . . . . . . .1472 °F

Setpoint Range

Indicating Range

Minimum/Maximum Range

-1999 . . . 9999 Enginerring Units

Setpoint Range

Indicating Range

ALM1

ALM2

( )

Absolute

value alarm

Deviation

alarm

Zone alarm

—

Alarm ON

Low Alarm

Alarm type Action diagram

Setpoint

No alarm

High alarm

Low alarm

High alarm (with hold)

Low alarm (with hold)

High alarm

Low alarm

High/Low alarm

High alarm (with hold)

Low alarm (with hold)

High/Low alarm

(with hold)

High/Low deviation

(ALM 1/2 independent action)

High/Low

absolute alarm

High/Low

deviation alarm

High absolute/

Low deviation alarm

High deviation/

Low absolute alarm

Low Alarm Hysteresis

AH AL

alarm

Alarm OFF Alarm OFF

High Alarm

Main

Hysteresis

Setpoint

AH AL

AHAL

Alarm ON

High Alarm

Setpoint

Page 15

grammed input range. The input range can be anywhere between -1999 and 9999 units and must be programmed in the lower limit of input range and the upper limit of input range parameters with decimal place values. Enter a Decimal Point Position code dependent on the desired resolution, the input type, and the programmed input range. Setting:

0 -None 1- Tenths of a unit 2 - Hundredths of a unit

PVOF Process Variable Offset: The Process variable Offset

is the amount by which the indicated process variable is shifted in a positive or negative direction. Both the indicated as well as the measured process variable will be changed. This parameter can be used to correct for differences in sensors, sensor placement, and standardization problems. Enter a value which is the difference between the measured process value and the actual process value of the system. Setting range: -10 – 10% of full scale, set in Eng. units

SVOF Setpoint Variable Offset: The Setpoint Variable Offset

is that amount of offset which shifts the measured setpoint variable in a positive or negative direction. The measured setpoint variable is changed but the indicated setpoint variable remains unchanged. Be careful when using this variable because what you see as the setpoint variable may be very different from the actual setpoint variable. Setting range: -50 – 50% of full scale, set in Eng. units Indicated Setpoint Variable is Unchanged Measured Setpoint Variable is Changed

P-F C/F Selection: The C/F Selection is that function which

scales the process variable and other setting variables to either the Celsius or Fahrenheit scale. If using the controller to control a process other than temperature using the current/voltage input model, the C/F Selection is not important because the scaling is done using the lower limit of the input range and upper limit of input range parameters. If using the thermocouple/RTD (Pt100) input model, however, the C/F Selection is important in scaling the controller’s parameters. Setting: °C or °F

FUZY Fuzzy Logic Control: Employing Fuzzy Logic Control in

addition to PID control eliminates system overshoot and effectively suppresses fluctuation of the process variable due to external disturbances. This function may be enabled even during auto-tuning. Note that fuzzy control is not effective in units with dual outputs, due to the complexity of the process. Fuzzy control is also inhibited while the Ramp/Soak function is in operation.

ADJ0 Input Calibration: This function is used for input cali ADJS bration by the user in a simple manner. Calibration is

effected by applying signal for zero and span points of the input range being used and then by setting errors. The user calibration function is an independent function and the instrument can easily be reset to conditions prior to delivery.

Example:

Input range 0-400°C Indication at 0°C : -1°C Indication at 400°C: 402°C Change ADJ0 to 1 and ADJS to -2 to correct the error. The instrument can be set back to factory values by setting ADJ0 and ADJS to 0.

dSP1 Parameter Mask function: This function is used to indi-

to to vidually mask the display of parameters that are not

dSP7 used for your application, or parameters that are not

to be accessed by the operator. To mask or unmask a parameter appropriate values should be selected from the DSP Assignment table.

Example 1:

To mask parameter P

1) Determine the dSP value for P from the Quick Reference guide. P = dSP1 – 2

2) Add 2 to the existing dSP1 value.

Example 2:

To display/unmask the parameter P-F

1) Determine the dSP value for P-F from the Quick Reference guide. P-F = dSP6 – 64

2) Subtract 64 from the existing dSP6 value.

ERROR MESSAGES

Error Indication Cause Control Output

1. Thermocouple burnt out. When the burn-out

2. RTD (A) leg burnt out. control output is set for

3. PV value exceeds P-SU lower limit (standard): by 5% FS. OFF, or 4mA or less.

1. When RTD (B or C) is When the burn-out burnt out. control output is set for

2. When RTD (between upper limit: ON, or 20mA A and B, or between or less. A and C) is shorted.

3. When PV value is below P-SL by 5% FS.

4. When analog input wiring is open or short.

When PV value goes below Control is continued

-1999.

the value reaches -5% FS or less, after which burnout condition will occur.

HB lamp Heater break condition Normal control output

ON for heating is continued.

When the setting of OFF, or, 4mA or less. P-SL/P-SU is improper

Fault in the unit Undefined. Stop use

immediately.

Page 16

APPENDIX A

Autotuning

By autotuning, the controller selects what it calculates to be the optimal PID control parameters for a particular process and then stores them in EEPROM memory for future use. The PID parameters are stored so that when the controller is powered up after being shut down, the controller does not need to be autotuned again. The PXZ uses the same autotuned PID parameters until the Autotune function is again initiated. The Autotune parameters are only good for the process the Autotune function was used on. If the setpoint is significantly changed, the input sensor is changed, the load or output device is changed or relocated, or any other disturbances occur which might change the dynamics of the system, the Autotune function should be performed again. The autotuned control parameters are not always perfect for every application but almost always give the operator a good starting point from which further refinement of the control parameters can be performed manually.

The PXZ’s autotuning algorithm is particularly suited for temperature control applications and may not always autotune effectively for other processes. Here are cases where the Autotune function does not perform well or does not perform at all:

1. The system is affected by process disturbances external to the control loop. Adjacent heater zones, changing material levels, exothermic reactions are examples of process disturbances which are external to the control loop. The PXZ would never be able to autotune such an unstable process.

2. The system is very dynamic. The process variable changes very quickly. Certain pressure and flow applications would be characterized as very dynamic. Because of how the Autotune function is performed, a very dynamic system would create very large overshoots which could damage the process.

3. The system is very insulated and cannot cool down in a timely manner. With such heating systems the autotuning function would take a very long time to complete with questionable results.

In Autotune, the PXZ sends test signals to the process. The test signals are 100% output and 0% output at the Autotune point. The Autotune point can either be at setpoint or 10% of full scale below setpoint.. The controller performs as an On/Off controller. See diagram below.

-LS

(1+TS)

The PXZ then reads the reaction of these test signals on the process. Keep in mind that every process is different and therefore every reaction to the test signals is different. This is why PID parameters are not the same for different processes. The amplitude (L) or lag time which is the overshoot and undershoot of the system when autotuning and the time constant (T) which is the time the process takes to go through one On/Off cycle is measured. See diagram below.

The measurements are then used with the Autotune algorithm for calculation of the proper PID parameters for the system. See the PXZ Autotune algorithm below, where K is the proportionality constant and S is the Laplace operator.

Time Constant

Overshoot

Amplitude

Undershoot

Time

OFF

Time

Autotune

Point

Process Variable

100%

Output

ON ON ONOFF OFF

Autotune Period

Time

Page 17

APPENDIX B

Manual Tuning

Tune the PXZ controller if any of the following occurs:

• PXZ is installed in a new system

• PXZ is used as a replacement in an existing system

• The input sensor is relocated or changed

• The output device is relocated or changed

• The setpoint is significantly changed

• Any other condition that will alter the dynamics of the system

Proportional Band

The proportional band is a band around the setpoint of the PXZ where the output is between 0% and 100%. The percentage of output is proportional to the amount of error between the setpoint variable (SV) and the process variable (PV). Outside of the proportional band the output is either 0% or 100% The proportional band on the PXZ is equidistant from the main setpoint as illustrated below.

An example of proportioning would be a vehicle approaching a stop sign at an intersection. If the driver were traveling at 50mph and only applied his brakes once at the intersection, his car would skid through the intersection before coming to a full stop. This illustrates how On/Off control acts. If, however, the driver started slowing down some distance before the stop sign and continued slowing down at some rate, he could conceivably come to a full stop at the stop sign. This illustrates how proportional control acts. The distance where the speed of the car goes from 50 to 0 MPH illustrates the proportional band. As you can see, as the car travels closer to the stop sign, the speed is reduced accordingly. In other words, as the error or distance between the car and the stop sign becomes smaller, the output or speed of the car is proportionally diminished. Figuring out when the vehicle should start slowing down depends on many variables such as speed, weight, tire tread, and braking power of the car, road conditions, and weather much like figuring out the proportional band of a control process with its many variables.

The width of the proportional band depends on the dynamics of the system. The first question to ask is, how strong must my output be to eliminate the error between the setpoint variable and process variable? The larger the proportional band (low gain), the less reactive the process. A proportional band too large, however, can lead to process wandering or sluggishness. The smaller the proportional band (high gain), the more reactive the output becomes. A proportion-

al band too small, however, can lead to over-responsiveness leading to process oscillation.

A proportional band which is correct in width approaches main setpoint as fast as possible while minimizing overshoot. If a faster approach to setpoint is desired and process overshoot is not a problem, a smaller or narrower proportional band may be used. This would establish an over-damped system or one where the output would change greatly, proportional to the error. If process overshoot cannot be tolerated and the approach to setpoint does not have to be quick, a larger or wider proportional band may be used. This would establish an under-damped system or one where the output would change little, proportional to the error.

Integral Time

With the proportional band alone, the process tends to reach equilibrium at some point away from the main setpoint. This offset is due to the difference between the output needed to maintain setpoint and the output of the proportional band at setpoint. In the case of the PXZ controller where the proportional band is equidistant from the main setpoint, the output is around 50%. If anything more or less than 50% output is required to maintain setpoint, an offset error will occur. Integral action eliminates this offset. See the diagrams below.

Integral action eliminates offset by adding to or subtracting from the output of the proportional action alone. This increase or decrease in output corrects for offset error within the proportional band in establishing steady-state performance at setpoint. It is not intended to correct for process disturbances. See the following diagram.

To Calculate Proportional Band:

Proportional Band Proportional Band

(as a percentage) =

____________________

X 100%

Input Range

Example:

30°C

3% =

__________

X 100%

100°C

Proportional Band

(as a percentage)

Proportional Band Range =

____________________

X 1000°C

100%

Example:

30°C =

__________ x 1000°C

100%

Output

Reverse Action

Main Setpoint

100%

Output

Direct Action

Main Setpoint

Note: PB = Proportional Band

Time

100%

Output

Main Setpoint

Proportional Band

Too Small

Proportional Band

Too Large

Proportional Band with Correct Width

Page 18

Tuning

Tuning the PXZ, as with any PID loop, requires tuning each parameter separately and in sequence. To achieve good PID control manually, you can use the trial and error method explained below.

Tune the Proportional Band

Set Integral Time = 0 (off)

Set Derivative Time = 0 (off) Start with a large Proportional Band value which gives very sluggish control with noticeable offset and tighten by decreasing the value in half. Analyze the process variable. If the control is still sluggish, tighten by decreasing the value in half again. Continue with the same procedure until the process starts to oscillate at a constant rate. Widen the Proportional Band by 50%, or multiply the setting 1.5 times. From a cold start, test and verify that the Proportional Band allows maximum rise to setpoint while maintaining minimum overshoot and offset. If not completely satisfied, fine-tune the value, up or down, as needed and test until correct. The Proportional Band is now tuned.

Add Integral Time

Start with a large Integral Time value which gives very sluggish response to process offset and tighten by decreasing the value in half. Analyze the process variable. If the response to process offset is still sluggish, tighten by decreasing the value in half again. Continue with the same procedure until the process starts to oscillate at a constant rate. Increase the Integral Time value by 50%, or multiply the setting 1.5 times. From a cold start, test and verify that the Integral Time allows maximum elimination of offset with minimum overshoot. If not completely satisfied, fine-tune the value, up or down, as needed and test until correct. The Integral Time is now tuned.

Add Derivative Time

Do not add Derivative Time if the system is too dynamic. Start with a small Derivative Time value which gives sluggish response to process upsets and double the value. Analyze the process variable. If the response to process upsets is still sluggish, double the value again. Continue with the same procedure until the process starts to oscillate at a quick constant rate. Decrease the Derivative Time value by 25%. From a cold start, test and verify that the Derivative Time value allows maximum response to process disturbances with minimum overshoot. If not completely satisfied, fine-tune the value, up or down, as needed and test until correct. Note that the Derivative Time value is usually somewhere around 25% of the Integral Time value.

Another tuning method is the closed-loop cycling or Zeigler-Nichols method. According to J.G. Zeigler and N.B. Nichols, optimal tuning is achieved when the controller responds to a difference between setpoint and the process variable with a 1/4 wave decay ratio. That is to say that the amplitude of each successive overshoot is reduced by 3/4 until stabilizing at setpoint. The procedure is explained below.

1. Integral Time=0

Derivative Time=0

2. Decrease the Proportional Band to the point where a constant rate

of oscillation is obtained. This is the response frequency of the system. The frequency is different for each process.

3. Measure the Time Constant which is the time to complete one cycle

of the response frequency. The Time Constant will be defined as

“T” when calculating Integral and Derivative Times.

Integral Time is the speed at which the controller corrects for offset. A short integral time means the controller corrects for offset quickly. If the integral time is too short, the controller would react before the effects of previous output shifts, due to dead time or lag, could be sensed causing oscillation. A long Integral time means the control corrects for offset over a long time. If the integral time is too long, the offset will remain for some time causing slow responding or sluggish control. See the diagram below.

Derivative Time

In the case of a process upset, proportional only or proportional-integral action cannot react fast enough in returning a process back to setpoint without overshoot. The derivative action corrects for disturbances providing sudden shifts in output which oppose the divergence of the process from setpoint. See the diagram below.

The derivative action changes the rate of reset or integration proportional to the rate of change and lag time of the system. By calculating the rate of change of the process and multiplying it by the lag time which is the time it takes the controller to sense an output change, the controller can anticipate where the process should be and change the output accordingly. This anticipatory action speeds up and slows down the effect of proportional only and proportional-integral actions to return a process to setpoint as quickly as possible with minimum overshoot. See the diagram below.

Derivative time is the amount of anticipatory action needed to return a process back to setpoint. A short derivative time means little derivative action. If the derivative time is too short, the controller would not react quickly to process disturbances. A long derivative time means more derivative action. If the derivative time is too large, the controller would react too dramatically to process disturbances creating rapid process oscillation. A process which is very dynamic such as pressure and flow applications is more efficiently controlled if the derivative action is turned off because of the oscillation problem which would result.

Setpoint

Short Integral Time

Output

Proportional Action Only

Offset

Time

Long Integral Time

Time

Rate of Change X Lag Time= Anticipated Process Variable

Time

Page 19

4. Widen the Proportional Band until only slightly unstable. This is the Proportional Band’s Ultimate Sensitivity. The Proportional Band’s Ultimate Sensitivity width will be defined as “P” when calculating the actual Proportional Band.

5. Use the following coefficients in determining the correct PID set-

tings for your particular application.

Time

P Only 2P * *

PI 2.2P .83T *

PID 1.67P .5T .125T

APPENDIX C

Heater Break Option

The Heater Break Option is used to detect heater break conditions and to energize an alarm relay when such conditions exist. In most cases, the option is used to detect the failure of one or more zones in a multi-zoned heater where all individual resistive heater zones are wired in parallel. Failed heater zones would create cold spots in a system which could hamper the process and even ruin the product. If cold spots in a system are a problem, the Heater Break Option is an effective way of alerting the operator of a heater break condition, a cause of cold spots.

The PXZ controller is able to detect a heater problem by analyzing the current used by the heater. The actual sensing is done by a current sensing transformer, sold separately, which is placed around the hot lead going to the heater and connected to the controller. The signal sent by the current sensing transformer is timed with the output of the PXZ. When the output is energized the signal sent from the current sensing transformer is analyzed. When the output is de-energized the signal sent from the current sensing transformer is not analyzed. This eliminates the alarm condition turning on and off due to the output condition of the controller. If the signal sent when the output is energized indicates that the current level is below what the Heater Break alarm is set for, the alarm is energized. The alarm is non-latching.

Notes:

1. The Heater Break Option is available on the PXZ-5, 7, and 9 controllers only.

2. The Heater Break Option cannot be used on the PXZ controller with a 4-20mA DC output. The current sensing transformer would pick up current changes due to fluctuating power output, between 0% and 100%, which would result in a heater break alarm condition even though no such condition existed.

3. The Cycle Time must be set at 6 secs. or higher in order for the controller to correctly analyze the signal sent by the current sensing transformer.

4. The power supply used should be the same for the PXZ and heater to eliminate current fluctuations due to power differences between different power supplies.

Control P I D Action Setting Setting Setting

Constant

Time

Page 20

APPENDIX D

Heat/Cool Option

With the Heat/Cool Option, the PXZ can control a temperature application with one input at one main setpoint using two outputs, a heating output and a cooling output. By using a heating and cooling output, a process is able to quickly bring the temperature to setpoint in both directions and to limit the amount of overshoot. The larger the deviation from setpoint, the more output applied to the system on both the heating and cooling sides. Heat/Cool control is a very effective way of controlling exothermic processes, processes that generate their own heat, or processes where ambient temperature is not adequate or fast enough in returning a process back to setpoint.

The two outputs on the PXZ are independent and sent to two different output devices. The PXZ can be equipped with two of the same or two different output types. Output #2 can be relay, SSR/SSC driver, or 4-20mA DC, regardless of what Output #1 is. Both output types must be specified when ordering.

The PXZ controls the cooling side with three additional parameters, TC-2, COOL, and DB. Each is explained below:

TC-2

Cycle Time (Output #2):

Because Output #2 is not necessarily the same as Output #1, the cycle time may be different

CooL Proportional Band Coefficient for Cooling:

Because the cooling power may not necessarily be the same as the heating power, the cooling proportional band may need to be different from that of the heating proportional band.

db Deadband/Overlap: Deadband is that area where

neither outputs are energized. Overlap is that area when both outputs are energized. This function lets you decide where you want the heating action to stop and the cooling action to begin.

Notes:

1. The Heat/Cool Option is available on the PXZ-5, 7, and 9 controllers only. Output #2 type can be the same or different than Output #1 type (Relay, SSR/SSC driver, or 4-20mA DC)

2. Integral and Derivative Times are the same for both the heating and cooling sides of a process with PID control because the response frequency or time constant of the system does not change at main setpoint when cooling is added.

3. The Proportional Band for heating and cooling are almost always different. Rarely does the same amount of cooling output remove the same percentage of process error as the heating output does. The Cooling Proportional Band must be manually and separately tuned.

4. If the heating side is set for On/Off control, the cooling side will be set for On/Off control also. Regardless of what the COOL parameter is set for, if the Proportional Band is set to zero, the Heating Proportional Band and the Cooling Proportional Band will always be zero or On/Off.

Wiring and Setting:

1. Choose the correct current sensing transformer based on the maximum current usage of the heater. 0 - 30 Amps (part # CTL-6-SF) 0 - 50 Amps (part # CTL-12-S36-8F)

2. Thread the hot lead going to the heater through the donut of the current sensing transformer. Connect the wires of the current sensing transformer to the current sensing transformer input terminals in the back of the controller.

3. Set Heater Break alarm setpoint parameter “Hb”. With the current sensing transformer connected and the heater in operation, output energized, change the Heater Break Alarm setting from the maximum current setting for the particular current sensing transformer being used to a lower value. Allow 3 secs. or more between setting changes. Continue lowering the setting until the relay is energized and the “HB” status indicator is lit. This is the maximum current usage of the heater. Using the same procedure, find the maximum current usage of the heater minus one zone. Set the setpoint in between the two current readings. In this way, the operator knows if one or more zones fail because the current sensed will only be below the Heater Break Alarm setting if one or more zones fail.

Connection to PXZ (Polarity not important)

Hot lead to Heater

Power Supply

Alarm Output

–

Main

Output

8 9

5 7

Current Sensing Transformer

Input Sensor

Heater

Page 21

5. If the cycle times of one or both outputs are long and the process

dynamic, there is a good chance that both outputs will be cycling on and off at the same time around main setpoint. This is evident if one or both outputs are relays.

6. Autotune is not effective on the cooling side of Heat/Cool control.

Autotune the controller for heat only and then manually tune the cooling parameters.

Wiring and Setting

1. Make sure that your PXZ has the correct output type installed for

Output #2. Verify that the TC2, COOL, and DB parameters are indicated in the primary (setpoint) menu.

2. Wire your cooling load to the Output #2 terminals located on the

back of your PXZ controller.

3. In the secondary (system) menu, program the correct code for

Heat/Cool action. See page 13 for the complete code table.

4. In the primary (setpoint) menu, program TC2, the cycle time for

Output #2. The table below is a general guide to TC2 settings.

5. Autotune or manually tune the PID parameters of your PXZ

controller. Autotune will work for the heating PID parameters but not on the cooling parameters. You must manually tune the cooling parameters.

6. With the heat side tuned, manually set the COOL parameter or

Proportional Band Coefficient for Cooling. If the cooling output is less powerful than the heating output, the Cooling Proportional Band must be narrower than the Heating Proportional Band; the COOL parameter would be less than “1”. If the cooling output is more powerful than the heating output, the Cooling Proportional Band must be wider than the Heating Proportional Band; the COOL parameter would be more than “1”. See the programming section for more details.

7. Finally, you can add a Deadband/Overlap. The programmed

Deadband/Overlap parameter can be within -50% to +50% of the Heating Proportional band. To establish a Deadband, parameter “db” is set somewhere between 0% and 50% of the Heating Proportional band. To establish an Overlap, db is set somewhere between -50% and 0% of the Heating Proportional Band.

8. Manually fine-tune the parameters COOL and db until just the right

amount of cooling is achieved. Refer to the programming section for more details on these parameters.

Heating Side Cooling SIde

Heating Proportional Band Cooling Proportional Band

[P/2] [P/2 COOL]

I I (same as for heating)

D D (same as for heating)

Relay 30

SSR Driver (pulsed DC) 2

4-20mA DC Not indicated or 0

Heating Side Cooling Side

Output#2 Type Setting(Secs)

Page 22

Parameter Range Description Default DSP

settings settings

ProG oFF/rUn/HLd Ramp/soak command oFF dSP1-1

P 0.0 - 999.9%FS Proportional band 5.0 dSP1-2

I 0 - 3200sec Integral time 240 dSP1-4

D 0.0 - 999.9sec Derivative time 60 dSP1-8

AL 0 - 100%FS Low Alarm Setpoint 10 dSP1-16

AH 0 - 100%FS High Alarm Setpoint 10 dSP1-32

TC 1 - 150sec Cycle Time (output #1) † dSP1-64

HYS 0 - 50%FS Hysteresis 1 dSP1-128

Hb 0.0 - 50.0A Heater-break alarm S.P. 0.0 dSP2-1 AT 0 - 2 Auto-tuning command 0 dSP2-2

TC2 1 - 150sec Cycle Time (output #2) † dSP2-4

CooL 0.0 - 100.0 Proportional band 1.0 dSP2-8

coefficient for cooling

db -50.0 - 50.0% FS Deadband/Overlap 0.0 dSP2-16 PLC1 - N/A -3.0 dSP2-32 PHC1 - N/A 103.0 dSP2-64 PCUT - N/A 0 dSP2-128 bAL 0 - 100% Balance 0.0/50.0 dSP3-1

Ar 0 - 100%FS Anti-reset windup 100%FS dSP3-2

LoC 0 - 2 Lock out 0 dSP3-4

STAT -- Ramp/soak status oFF dSP3-8

SV-1 0 - 100%FS 1st S.P. 0%FS dSP3-16

TM1r 0 - 99hr 59min 1st ramping time 0.00 dSP3-32

TM1S 0 - 99hr 59min 1st soaking time 0.00 dSP3-64

SV-2 0 - 100%FS 2nd S.P. 0%FS dSP3-128

TM2r 0 - 99hr 59min 2nd ramping time 0.00 dSP4-1

TM2S 0 - 99hr 59min 2nd soaking time 0.00 dSP4-2

SV-3 0 - 100%FS 3rd S.P. 0%FS dSP4-4

TM3r 0 - 99hr 59min 3rd ramping time 0.00 dSP4-8

TM3S 0 - 99hr 59min 3rd soaking time 0.00 dSP4-16

SV-4 0 - 100%FS 4th S.P. 0%FS dSP4-32

TM4r 0 - 99hr 59min 4th ramping time 0.00 dSP4-64

TM4S 0 - 99hr 59min 4th soaking time 0.00 dSP4-128

MOD 0 -15 Ramp/Soak Mode code 0 dSP5-1

PXZ QUICK REFERENCE

Primary Menu

Parameter Range Description Default DSP

settings settings

P-n1 0 -19 Control Action code † dSP5-4 P-n2 0 - 16 Input type code † dSP5-8 P-dF 0.0 - 900.0sec Input filter constant 5.0 dSP5-16

P-SL -1999 - 9999 Lower range of input 0%FS dSP5-32

P-SU -1999 - 9999 Upper range of input 100%FS dSP5-64

P-AL 0 - 15 Alarm Type 2 code 9 dSP5-128

P-AH 0 - 11 Alarm Type 1 code 5 dSP6-1

P-An 0 - 50%FS Alarm Hysteresis 1 dSP6-2

P-dP 0 - 2 Decimal point position 0 dSP6-4

rCJ - - ON dSP6-8 PVOF -10 - 10%FS PV offset 0 dSP6-16 SVOF -50 - 50%FS SV offset 0 dSP6-32

P-F °C/°F °C/°F Selection † dSP6-64

PLC2 - N/A -3.0 dSP6-128

PHC2 - N/A 103.0 dSP7-1

FUZY OFF/ON Fuzzy control OFF dSP7-2

GAIN - N/A 1 dSP7-4 ADJO - Zero calibration 0 dSP7-8 ADJS - Span calibration 0 dSP7-16

OUT - N/A -3.0 dSP7-32

dSP1-7 0-255 Parameter mask † -

† Based on the model

PXZ QUICK REFERENCE

Secondary Menu

Fuji Electric PXZ Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

TABLE OF CONTENTS

MODEL CONFIGURATION

SAFETY PRECAUTIONS

FEATURES

INTRODUCTION

SPECIFICATIONS

OUTER DIMENSIONS AND PANEL CUTOUT SIZE

INSTALLATION

WIRING INSTRUCTIONS

FRONT PANEL DESCRIPTION

FRONT PANEL OPERATION

AUTOTUNING

PRIMARY MENU SETTINGS

SECONDARY MENU SETTINGS

ERROR MESSAGES

APPENDIX A

APPENDIX B

APPENDIX C

APPENDIX D