CIAT TruVu Plant Sequencer User manual

Brand: CIAT

Model: TruVu Plant Sequencer

Type: User manual

TVPS v1.0 - CIAT - ENG - User Manual.docx

TruVu Plant Sequencer

USER MANUAL

28/09/22

Initial release

Rev.

Date

Comments

     

TVPS v1.0 - CIAT - ENG - User Manual.docx 
Summary 
Glossary ................................................................................................................................................... 3 
 Navigation bar ................................................................................................................................. 3 
 Status bar ......................................................................................................................................... 4 
 Home page ...................................................................................................................................... 4 
1.  Information displayed ............................................................................................................. 5 
2.  Colour code ............................................................................................................................. 6 
3.  Available buttons ..................................................................................................................... 8 
3.1. Staging menu button ...................................................................................................... 8 
3.2. Reset button.................................................................................................................... 9 
3.3. Manual start .................................................................................................................. 11 
 Authentication page ...................................................................................................................... 11 
 Alarm page .................................................................................................................................... 12 
 Trends page ................................................................................................................................... 13 
 Status and configuration pages ..................................................................................................... 13 
1.  Status of the plant ................................................................................................................. 14 
1.1. Products ........................................................................................................................ 14 
1.2. Staging ........................................................................................................................... 16 
1.3. Temperatures ................................................................................................................ 20 
1.4. Pumps ............................................................................................................................ 21 
1.5. Power Meter ................................................................................................................. 22 
1.6. Heat/Cool ...................................................................................................................... 23 
2.  Configuration of the PLC ....................................................................................................... 24 
2.1. Setpoints & Offsets ....................................................................................................... 26 
2.2. Maintenance ................................................................................................................. 29 
2.3. Manual Control ............................................................................................................. 30 
2.4. Order Rotation .............................................................................................................. 31 
2.5. Staging Settings ............................................................................................................. 35 
2.6. BMS Threshold .............................................................................................................. 38 
2.7. Heat/Cool Settings ........................................................................................................ 39 
2.8. Pumps ............................................................................................................................ 40 
2.9. Manager Settings .......................................................................................................... 43 
2.10. Low Request .................................................................................................................. 45 
2.11. Language ....................................................................................................................... 46 
 

TVPS v1.0 - CIAT - ENG - User Manual.docx

Glossary

Acronym

Complete name

TVPS

TruVu Plant Sequencer

Product

Chiller, Heat Pumps, …

BMS

Building Management System

General note: in the event of a TruVu Plant Sequencer regulation malfunction, turn the key in

front of the electrical panel to switch the products OFF, then manually switch the products to

“LOCAL ON” via their own consoles to let them operate autonomously. Pumps (if present) must

be manually started.

1. Navigation bar

The navigation bar is located at the bottom of each screen and is always displayed. Using the

buttons, the user can navigate through the different pages of the screen interface.

Home page

Alarms page

Trends page

Status and

configuration

pages

TVPS v1.0 - CIAT - ENG - User Manual.docx

2. Status bar

The status bar is in the top right corner of the page and is always displayed. The data displayed

are:

- The regulation status (started/stopped),

- The status of the user connection (USER, ADMIN or FACTORY) on the screen,

- The state of the alarms (fault or alarm) of the regulation,

- The date and the time.

Synthesis event status:

Orange blinking = Alert

Red blinking = Alarm

Cascade status:

Green = Started

Grey = Stopped

Green = Logged1

Grey = Not logged

Time

Date

3. Home page

The home page is the first screen the user will see. Most of the information are displayed on

this page as a synoptic:

Green whatever the current level of the user logged (USER, ADMIN or FACTORY). A session will automatically

be disconnected after a 15 minutes period of non-use.

TVPS v1.0 - CIAT - ENG - User Manual.docx

The hydraulic diagram displayed on this page reflects what is actually used by the installation

(for example here 4 products and 2 secondary variable pumps with variable control). The

display of this diagram and the regulation are configured during commissioning by the CIAT

technician. These parameters can only be modified with the "Factory" access level.

3.1. Information displayed

▪ Outside Air temperature (physical sensor furnished with the TVPS)

▪ Setpoint (applied to the cascade)

▪ Current capacity of each product

▪ Products’ status

▪ Leaving temperature of each product

▪ Entering temperature of each product

▪ Leaving temperature of the installation (physical sensor furnished with the TVPS)

▪ Entering temperature on the installation (physical sensor furnished with the TVPS)

▪ Pumps’ status (if present)

▪ VFD command of the pumps (if present)

▪ Differential pressure on the secondary (if present)

▪ Current production mode HEAT/COOL (if the products allows it)

TVPS v1.0 - CIAT - ENG - User Manual.docx

3.2. Colour code

1) Products

Grey: The product is not running and is waiting to start

Green: The product is running without any error

Yellow: The product has at least one minor defect or is unavailable

for ordering through the TVPS. In this state, the product may or

may not work depending on the origin of the problem; for more

information, refer to the state of the product.

Red: The product is in alarm and is not running

The status of the product is displayed above the product on the

main page.

The different states possible for the products’ status are:

▪ Not configured (red): commissioning has not yet taken place; the PLC does not have

the correct information concerning the product,

▪ Maintenance (yellow): the product has been put into maintenance by a user,

▪ No communication (red): communication with the product is not established or has

been lost,

▪ Not in network mode (yellow): the product is not in network mode,

▪ Manual (yellow): the product has been forced to ON or OFF manually,

▪ Full failure (red): the product has one or more alarm and no longer works,

▪ Partial failure off (yellow): the product has one or more alerts and is stopped,

▪ Partial failure on (yellow): the product has one or more alerts and is working,

TVPS v1.0 - CIAT - ENG - User Manual.docx

▪ Running (green): the product is running normally,

▪ Off (grey): the product is stopped and waiting for a start order.

2) Pumps (if present)

Grey: The pump not running and is waiting for a start order

Green: The pump is running without any error

Yellow: The pump is manually started by an external source

Red: The pump is in alarm and cannot start

3) Production Mode (if possible)

The production mode of the installation is set to “Cooling”

The production mode of the installation is set to “Heating”

4) Pipes

There is no flow2 in the pipes

There is flow3 in the pipes and installation is in heating mode

Flow presence based of products running feedback

TVPS v1.0 - CIAT - ENG - User Manual.docx

There is flow4 in the pipes and installation is in cooling mode

3.3. Available buttons

Additional buttons are displayed in the home page and allow the user to navigate or interact

with the sequencer.

Access to staging menu

Event acknowledgment (Reset)

3.3.1. Staging menu button

This button changes the current page to a synthesis page that display the main information

about the sequencer cascade status.

Information of the displayed data:

▪ Number of running products: indicates the number of products in "running" state,

Flow presence based of products running feedback

TVPS v1.0 - CIAT - ENG - User Manual.docx

▪ Number of available products: indicates the number of products in "off" state and

without alarm,

▪ Next chiller to start: number of the next chiller to start if a stage up occurs,

▪ Next chiller to stop: number of the next chiller to stop if a stage down occurs,

▪ Deadband setpoint & pullrate: see paragraph 0,

▪ Plant capacity max limitation: see paragraph 0,

▪ Max difference of temperature: see paragraph 0,

▪ Deadband setpoint & hysteresis: see paragraph 0,

▪ Stating up in progress: condition for the stage up is fulfilled, a stage up will take place

after the end of the remaining time,

▪ Staging down in progress: condition for the stage down is fulfilled, a stage down will

take place after the end of the remaining time,

▪ Remaining time before stage up: time remaining before stage up,

▪ Remaining time before stage down: time remaining before stage down.

It is also possible for the user to do a manual

staging using the plus and minus buttons. The

user must be connected as USER to see the

manual staging buttons.

A click on “+” will manually add a stage to the cascade with consequence to start a product (if

there is one available and within the limit of the maximum number of products that can be

started)

A click on “-“ will manually remove a stage to the cascade with consequence to stop a product

(limited to the minimum number of products in operation).

A message will appear to indicate if the staging manual has been considered by the sequencer.

Warning: Manual staging bypasses the automatic operation of the cascade and can cause

drifts and disturbances in the network temperature. Manual staging must only be used in

exceptional cases and with full knowledge of the facts.

3.3.2. Reset button

This button is displayed only if a user is logged at least as USER level. Click on it to acknowledge

and reset all alarm and alert of the sequencer.

TVPS v1.0 - CIAT - ENG - User Manual.docx

Note: This button only clears the faults and alarms of the cascade whose activation conditions

are no longer true, the faults specific to the products (triggered by their internal regulation)

must be acknowledged on their own consoles.

TVPS v1.0 - CIAT - ENG - User Manual.docx

3.3.3. Manual start

This button is displayed only if a user is logged at least as USER level and if the start type of

the cascade is set to “Manual” in the screen settings. Click on it to manually start the

regulation. The start orders from the key button in front of the cabinet or from the building

management system (BMS) is ignored.

4. Authentication page

This page allows the user to authenticate himself using a level and a password to access more

settings on the interface. 3 authentication level are available:

▪ USER: can modify the most basics features of the cascade like the setpoint, the

maintenance status, the manual control, or the staging settings,

▪ ADMIN: can modify program operation like change the setpoint mode, change the

order rotation type or the manager start settings,

▪ FACTORY: used by CIAT technician during commissioning or to adapt the regulation if

changes have been made on the installation.

Note: A session will automatically be disconnected after a 15 minutes period of non-use.

TVPS v1.0 - CIAT - ENG - User Manual.docx

5. Alarm page

In this page, the user can see what alarm is active and when it got triggered. Alarms displayed

here are only alarms of the regulation.

The internal alarm of each product will be summarized and displayed in partial / shutdown,

for details the user will have to go to the products panel or in the alarm page of the regulation

display for the alarm codes.

TVPS v1.0 - CIAT - ENG - User Manual.docx

6. Trends page

The trends page is used to see in the form of a graph, the evolution of some values. The

displayed values are:

▪ Trend 1: System entering water temperature and system leaving water temperature

▪ Trend 2: Status of the products

▪ Trend 3: Capacity of the products

The user can change the y axis of the curve by clicking on the minimum and maximum of the

axis and entering the new values.

7. Status and configuration pages

Some pages have an internal menu for navigation:

TVPS v1.0 - CIAT - ENG - User Manual.docx

Sub-menu

internal to the

page, the arrow

indicates which

page is currently

displayed

7.1. Status of the plant

7.1.1. Products

These pages display all the information about the internal status of the products; these data

are directly read in the internal regulation of the products and displayed on the screen.

Page 1:

Page 2:

Directional

arrows allow

navigation

within the page

TVPS v1.0 - CIAT - ENG - User Manual.docx

Information of the displayed data:

▪ Status: indicates whether the product is started, stopped or faulty,

▪ Communication: Indicates whether the BACnet IP communication between the

products and the TruVu Plant Sequencer is functional (green) or not (red),

▪ Setpoint: value of the product’s control point,

▪ Current Capacity: operating capacity as a percentage,

▪ Heat/Cool: product production mode (heating or cooling),

▪ Delay Before Start: remaining delay between the command and the effective start of

the product for it to make its internal verifications,

▪ Demand Limit: maximum limitation of the operating capacity as a percentage,

▪ Run Hours: accumulated product runtime,

▪ Number of starts: total number of product start,

▪ Alarm Status: product alarm status, can be in red (the product is in alarm and cannot

start), in orange (the product is in alert and can work in partial load, the percentage of

load depends on the active faults) or grey (no alarm),

▪ Alarm_X: details of the product's alert and alarm codes, details of these events must

be found in the documentation supplied with the product.

TVPS v1.0 - CIAT - ENG - User Manual.docx

7.1.2. Staging

These pages display all the necessary information about the cascade calculated by the

sequencer.

Page 1: This tab displays general information about the products from the sequencer point of

view.

Page 2: this tab displays additional information relating to the staging UP of the manager (start

of a product). A stage up (start of a additional product) will occur when one of the conditions

(between 1, 2 and 3) is fulfilled.

TVPS v1.0 - CIAT - ENG - User Manual.docx

Page 3: this tab displays additional information relating to the staging DOWN of the manager

(stop of a product) A stage down (stop of one running product) will occur when the condition

is fulfilled.

Information of the displayed data:

▪ Command: Indicates whether the sequencer has requested a group to start,

▪ Running: product operating feedback,

▪ Mode: indicates whether the product has been forced by the user through the screen

settings (Manual OFF = Forced OFF, Manual ON = Forced ON) or is managed by the

cascade (AUTO = not forced),

▪ In maintenance: Used to display whether the product is temporarily removed from

the cascade (Yes) or if its operation is nominal (No),

▪ External Hand: the product operating feedback remains active while the manager

sends it a shutdown request (product has been manually started by an external

source),

▪ Run Feedback alarm: the product operating feedback remains inactive while the

sequencer sends it a start request,

▪ Available: the product is available and ready to be started,

▪ Demand Limit: limitation based on user’s settings to restrict the capacity of the

product (cascade on partial load).

▪ Staging up in progress: informs the user that one of the Stage UP conditions is met

and that the manager will perform a stage up (start a new product) after the pre-stage

up delay,

TVPS v1.0 - CIAT - ENG - User Manual.docx

▪ Next product to start: indicates which product will be the next to start when a stage

up occurs,

▪ Staging down in progress: informs the user that the Stage DOWN condition is met and

that the manager will perform a stage down (stop of a product) after the pre-stage

down delay,

▪ Next product to stop: indicates which product will be the next to stop when a stage

down occurs.

The addition of another product will occur as soon as one of the bundles of conditions below

is active:

▪ Stage UP conditions 1:

1.1) Delay after base chiller/heat pump start

1.2) Temperature drift active: Difference (STAGE UP 1: Dead band Setpoint) between the

measured system supply temperature and the plant setpoint,

1.3) Pull down/up rate validated: The system supply temperature is steady or not catching

the setpoint up quickly enough. The pull down/up rate is measured in degrees per

second, if this rate is less than the pulldown rate limit (STAGE UP 1: Pull rate) the

condition is active,

1.4) Delay: All the previous conditions must be true for a certain time (Delay before stage

up).

▪ Stage UP conditions 2:

2.1) Delay after base chiller/heat pump start

2.2) Plant capacity: average capacity of running products in percent above stage up

threshold (STAGE UP 2: Plant Capacity),

2.3) Delay: All the previous conditions must be true for a certain time (Delay before stage

up).

▪ Stage UP conditions 3:

3.1) Delay after base chiller/heat pump start

3.2) Delta T: The Delta between the system supply temperature and the cascade setpoint

above maximum delta T threshold (STAGE UP 3: Delta Temperature),

TVPS v1.0 - CIAT - ENG - User Manual.docx

3.3) Delay: All the previous conditions must be true for a certain time (Delay before stage

up).

The withdrawal of a chiller/heat pump will occur as soon as the bundles of conditions below

are active:

▪ Stage DOWN conditions:

1.1) Temperature drift inactive: The measured system supply temperature is lower than

0,6 x the temperature drift value configured in the stage UP conditions 1 (the result

value is displayed in STAGE DOWN: Dead band Setpoint),

1.2) Plant capacity: The current average plant load is less than the anticipated combined

chiller capacity of the next stage down adjusted by a coefficient (result threshold is

displayed in STAGE DOWN: Staging down hysteresis),

1.3) Delay: All the previous conditions must be true for a certain time (Delay before stage

down).

TVPS v1.0 - CIAT - ENG - User Manual.docx

7.1.3. Temperatures

All the temperatures wired to or read by the sequencer are displayed on this page.

Information of the displayed data:

▪ System leaving temperature: temperature at the outlet of the primary hydraulic

circuit,

▪ System return temperature: temperature at the inlet of the primary hydraulic circuit,

▪ Outside air temperature: outdoor air temperature measured by the external

temperature sensor,

▪ Evaporator entering temperature product X: temperature at the inlet of the product

number X,

▪ Evaporator leaving temperature product X: temperature at the outlet of the product

number X.

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CIAT TruVu Plant Sequencer User manual

CIAT TruVu Plant Sequencer User manual

CIAT TruVu Plant Sequencer User manual

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