INFINITE SYSTEMS INSIGHTS:
BMS Points List Guide: What to Include in a Building Management System Quotation
A BMS quotation is only as clear as its points list. The points list defines what the Building Management System will monitor, command, alarm, trend and display for each piece of equipment. Without a clearly defined list, two proposals can appear similar while including very different control, integration and commissioning scopes.
PLANNING PRINCIPLE
Before comparing BMS quotations, define the equipment list, required points, control sequences, communication protocols, graphics, alarms, trends and commissioning requirements. A measurable scope makes technical and commercial comparison more consistent.
01 / PROJECT CONTEXT
What Is a BMS Points List?
A BMS points list is a structured inventory of the physical I/O and network values required for each equipment type. It provides a common reference for design, quotation, controller sizing, programming, graphics, alarms, trends and commissioning.
A typical list may identify the equipment tag, point description, signal type, engineering unit, alarm requirement, trend requirement, controller or communication source, and whether the point is read-only or writable.
AI — ANALOG INPUT
Measured values such as temperature, pressure, humidity, level or other variable signals.
AO — ANALOG OUTPUT
Modulating commands such as valve, damper or other variable-position control.
DI — DIGITAL INPUT
Binary status such as run, fault, alarm, proof or equipment state.
DO — DIGITAL OUTPUT
Binary commands such as start/stop, enable/disable or relay control.
02 / POINT ARCHITECTURE
Physical Points vs. Network Points
Physical points terminate directly at a BMS controller through analog or digital I/O. Network points are obtained from compatible equipment through BACnet, Modbus or another supported protocol.
PHYSICAL I/O
Hardwired Points
Signals are connected directly to controller inputs or outputs. Controller capacity, wiring, panels, power supplies and field devices need to be considered in the design.
NETWORK INTEGRATION
Protocol Points
Compatible equipment can expose multiple values through a communication network, reducing the need to hardwire every individual signal.
Network integration does not automatically mean every available value can be used. The project should confirm the protocol, available objects or registers, addressing, gateway requirements, write permissions, licensing and compatibility with the selected BMS platform.
03 / EQUIPMENT POINTS
Typical AHU Points
Air-handling units are a common BMS-controlled equipment type. The final points depend on the AHU configuration, control sequence, equipment supplier and project requirements.
Temperature & Airside
- Supply-air temperature
- Return-air temperature where required
- Space or zone temperature where applicable
- Humidity where required
Fan & Equipment Status
- Fan run status
- Fan fault
- Start/stop command
- VFD speed, frequency or fault where supported
Filters, Valves & Dampers
- Filter differential pressure
- Valve command and feedback where available
- Damper command or status
- Other equipment-specific proof signals
The point list should be developed together with the sequence of operation. Adding a temperature sensor or valve command does not, by itself, define how the control loop should operate.
04 / CONTROL LOGIC
Points Are Not the Same as Sequences
A points list identifies the data and commands available to the BMS. The sequence of operation defines what the BMS should do with those points.
POINT
Supply-air temperature sensor.
COMMAND
Chilled-water valve modulating command.
SEQUENCE
Defines how the measured temperature influences the valve and equipment operation.
Other sequence requirements may include occupancy schedules, setpoints, alarm limits, interlocks, optimum start, shutdown conditions and equipment lead/lag logic. These should be documented separately or referenced clearly in the project control narrative.
PROCUREMENT NOTE
Compare BMS proposals using the points list, sequence of operation, controller count, graphics, alarms, trends, integrations and commissioning scope — not only the total price.
05 / INTEGRATION
BACnet, Modbus and Intelligent Equipment
Chillers, meters, VFDs, generators and other intelligent equipment may provide information through a communication protocol rather than individual hardwired points.
1. Protocol
Confirm BACnet, Modbus or another supported communication method.
2. Point Map
Identify available values, registers or objects required by the BMS.
3. Permissions
Determine which values are read-only and which commands may be written.
4. Infrastructure
Confirm network medium, addressing, gateways, licenses and integration responsibilities.
06 / DOCUMENTATION
What Should the BMS Points List Define?
A useful points list should contain enough information for the project team to understand the intended monitoring and control scope.
Equipment Information
- Equipment tag
- Equipment type
- Location
- System or zone
Point Information
- Point description
- AI / AO / DI / DO
- Engineering unit
- Scaling or range
Control & Alarm
- Command or status
- Alarm requirement
- Alarm priority/delay
- Normal operating range
Monitoring & Testing
- Trend requirement
- Graphic location
- Read-only/writable status
- Acceptance test requirement
07 / PROJECT COORDINATION
Define Responsibilities Before Installation
BMS scope often crosses several trades. The points list should therefore be coordinated with mechanical, electrical, controls, equipment and network requirements before programming begins.
DEFINE
Identify equipment, required points and intended control functions.
COORDINATE
Confirm signals, protocols, wiring, gateways and responsibilities with affected trades.
IMPLEMENT
Configure controllers, graphics, alarms, trends and approved control logic.
VERIFY
Test field signals, commands, alarms, communications and sequences during commissioning.
08 / COMMISSIONING
BMS Points List Commissioning Workflow
Commissioning should verify that the points list reflects the installed equipment and that each required signal or command produces the intended result.
01 — REVIEW
Review approved points list, drawings and sequence of operation.
02 — VERIFY
Verify field devices, wiring, controller channels and network communications.
03 — TRIGGER
Generate the appropriate field condition or command.
04 — CONFIRM
Confirm BMS indication, command response, alarm and feedback where required.
05 — RESET
Return the equipment to its normal operating condition.
06 — DOCUMENT
Record results, deficiencies, corrections and final acceptance status.
09 / PROCUREMENT CHECKLIST
BMS Quotation Checklist
When requesting or comparing BMS proposals, consider documenting the following scope items:
- Equipment schedule and equipment quantities
- Complete points list by equipment type
- Physical I/O versus network integration points
- Controller quantity and capacity
- BACnet, Modbus or other protocol requirements
- Gateways, licenses and integration hardware
- Control sequences and interlocks
- Graphics and operator workstation requirements
- Alarm priorities, delays and notifications
- Trend requirements and historical data
- Network and structured cabling responsibilities
- Programming and configuration scope
- Testing, commissioning and operator training
- As-built documentation and final point schedules
For broader BMS planning and cost considerations, see the BMS Cost Philippines guide.
10 / RELATED SOLUTIONS
Related Infinite Systems Solutions
Building Management Systems
Explore BMS solutions for centralized monitoring, control, integration and building operations.
Structured Cabling Systems
Coordinate the network infrastructure supporting BMS controllers, gateways and connected building systems.
BMS Cost Philippines
Review the major scope and cost factors that can affect a BMS project in the Philippines.
FAQ / COMMON QUESTIONS
Frequently Asked Questions
What do AI, AO, DI and DO mean?
They identify analog inputs, analog outputs, digital inputs and digital outputs used by BMS controllers.
Does every BMS point require a physical wire?
No. Compatible equipment may expose multiple values through a supported network protocol such as BACnet or Modbus.
Can all BACnet or Modbus points be controlled?
No. Some values are read-only, while available commands depend on the equipment, protocol implementation and permissions.
Why is a points list important for quotations?
It creates a measurable technical scope so proposals can be compared using similar monitoring, control, integration and commissioning requirements.
Is the points list enough to define a BMS project?
Not by itself. The points list should be coordinated with the sequence of operation, system architecture, graphics, alarms, network requirements and commissioning scope.
When should the points list be prepared?
Ideally, it should be developed early enough to support design coordination and procurement, then updated as equipment selections and approved requirements are finalized.
PLAN YOUR BMS PROJECT
Need help defining your BMS points and integration scope?
Infinite Systems can support BMS planning, points-list development, control architecture, equipment integration, graphics, commissioning and retrofit strategies based on the project’s technical requirements.