Vendor-neutral troubleshooting guides, scripts, tool tutorials, and configuration references for BACnet, Niagara, Modbus, Facility Explorer, and building automation networks.
45 articles
Remote Embedded Firewall Configuration Without Locking Yourself Out
A firewall change on a device at a remote building site has to be made over the same path it can block; a single wrong rule locks the technician out and turns a five-minute edit into a truck roll.
YABE Download: Where to Get Yet Another BACnet Explorer Safely
A search for 'yabe download' returns SourceForge, an unofficial GitHub mirror, and a wall of freeware aggregators that wrap the tool in their own installer; technicians need the authentic, free copy and the handful of requirements to run it.
Tridium Upgrade: Niagara Version Upgrade and Migration Guide
Technicians need to move a Niagara station to a newer version but get blocked by a lapsed SMA, version mismatches between Workbench and the station, or hardware that cannot host the target build.
IT/OT Separation Services: What They Cover and How to Evaluate Them
Building owners are told they need 'IT/OT separation,' but the market term covers everything from a one-time VLAN configuration to a multi-year zone-and-conduit redesign; evaluating providers requires understanding what the work actually involves.
Conduit Security for Building Automation Networks
Auditors and insurers ask how traffic between BAS security zones is controlled, but most buildings have undocumented, wide-open conduits where inter-VLAN routing is left unrestricted.
Secure Remote Access for Cyber-Physical Systems (CPS)
Vendors and integrators need remote access to physical control systems, but persistent VPNs, port forwarding, and shared credentials create the third-party exposure that drives most OT security incidents.
bacpypes3 Type System Reference: Any, Choice, Real, Time and Schedule Types
bacpypes3 class definitions look surprising in isolation — a Time that is a tuple, a Choice that subclasses Sequence — and constructors reject values that look correct.
Modbus Function Codes: Complete Reference Cheat Sheet
Technicians know they need 'function code 3' for holding registers but lose time hunting down the rest — the read/write split, the exception code map, and which functions a given gateway actually implements.
BACnet COV vs Polling: Tradeoffs and When to Use Each
Integrators default to polling everything and discover the network can't keep up, or default to COV and discover subscriptions silently lapse without producing an alarm.
BACnet Write Priority Array Explained
Operator writes to a commandable object appear to succeed but Present_Value never changes, or an override gets stuck because no one wrote NULL to release the slot.
ThingsBoard IoT Gateway for Building Automation
Integrating legacy BAS protocols (BACnet, Modbus) with modern IoT platforms.
Facility Explorer FX60 Network Configuration
FX60 DIN-rail controllers need correct LAN1/LAN2, HTTPS port 5011, and BACnet driver setup.
VOLTTRON for Building Energy Management
Open-source platform from DOE for building controls and distributed energy, but documentation is fragmented.
How to Run a BAS Cybersecurity Audit
Building owners face pressure from insurers and regulations but have no BAS-specific audit checklist.
Niagara Driver Configuration Cheat Sheet
Setting up BACnet, Modbus, and LonWorks drivers in Niagara Workbench involves non-obvious configuration steps.
BACpypes3: Custom BACnet Applications in Python
Advanced BACnet automation requires understanding the BACpypes3 library beyond BAC0's abstractions.
OPC UA with Python: asyncua Quick Start for BAS
Connecting to OPC UA servers in building automation using the asyncua library.
KNX Network Scanning with KNXmap
Auditing and scanning KNXnet/IP gateways for security assessment or device inventory.
BACnet MS/TP Wiring Best Practices
Improper wiring (T-taps, missing termination, wrong cable) causes intermittent failures that are hard to diagnose.
IEC 62443 Security Zones for Building Automation
IEC 62443 guidance is abstract and manufacturing-focused; BAS professionals need a practical translation.
BACnet Trending: Configure and Export Trend Logs
Extracting historical data from BACnet Trend Log objects for analysis or compliance reporting.
Troubleshooting a Slow Niagara JACE
JACE becomes sluggish from excessive history logging, too many Workbench sessions, or SD card degradation.
BACnet Network Number Planning Guide
Conflicting network numbers after adding routers cause routing loops and device unreachability.
How to Back Up and Restore a Niagara JACE
SD card failures and botched upgrades require restore from backup, but many sites have no documented backup procedure.
Modbus RTU to TCP Gateway Setup Guide
Legacy Modbus RTU devices need to connect to IP-based supervisors; gateway selection and configuration is confusing.
Niagara Workbench Productivity Tips and Shortcuts
Engineering in Workbench is slow; technicians miss batch editing, search sidebar, and compositing features.
Facility Explorer FX80 Initial Setup Checklist
FX80 arrives factory-commissioned but default credentials and network settings must be changed before deployment.
VLAN Design for Building Automation Networks
IT teams lack guidance on structuring VLANs specifically for BAS protocols and broadcast traffic.
PyModbus Quick Start: Read Registers with Python
Technicians want to script Modbus reads for testing or data collection but need a simple starting point.
BACnet Duplicate Device ID: Find and Fix It
Two devices sharing a device instance number cause data collisions, lost messages, and control failures.
BACnet Discovery Tool (BDT) Setup and Usage
Technicians need a vendor-neutral free tool to verify BACnet/IP communication and discover MS/TP devices through routers.
BACnet/IP to MS/TP Router Configuration
Bridging BACnet/IP supervisors to MS/TP field trunks requires correct IP settings, MAC addresses, baud rate, and network number assignment.
How to Export Niagara 4 History Data to CSV
Getting trend data out of a JACE for analysis or reporting requires manual steps or third-party modules.
Modbus Register Map Reading Guide for BAS
Technicians struggle to interpret Modbus register maps for VFDs, energy meters, and chillers; 0-based vs 1-based addressing causes off-by-one errors.
How to Connect to a Niagara JACE Remotely
Technicians cannot reach JACE controllers at remote sites; VPN config, port forwarding, and certificate errors block access.
Fix Niagara 4 Certificate and SSL Errors
Workbench shows certificate errors after expiration, IP change, or version upgrade; platform daemon fails to start.
Python BACnet Scripting with BAC0
Technicians want to automate BACnet reads/writes but Python BACnet libraries have steep learning curves.
Modbus RTU Troubleshooting Checklist for BAS
Communication fails due to mismatched baud rates, wrong parity, reversed RS-485 polarity, or register addressing confusion.
BACnet Firewall Rules: Ports to Open and Block
After network segmentation, BACnet traffic gets blocked by firewalls; technicians need exact port/protocol rules.
How to Fix BACnet MS/TP Address Conflicts
Duplicate MAC addresses on an MS/TP trunk cause intermittent communication failures and CRC errors.
BACnet BBMD Setup: Multi-Subnet Discovery
WHO-IS broadcasts stop at subnet boundaries; devices on other VLANs are invisible without BBMD.
Wireshark Display Filters for BACnet
Technicians capture traffic but cannot isolate BACnet packets from general network noise.
YABE (Yet Another BACnet Explorer) Tutorial
Technicians need a free tool to browse BACnet devices but YABE documentation is sparse.
BACnet Device Discovery Not Working: Fix It
WHO-IS requests go unanswered; causes range from firewall rules to duplicate device IDs to subnet mismatches.
BACnet Secure Connect (BACnet/SC) Setup Guide
BACnet/SC requires TLS certificates, hub configuration, and WebSocket setup that most technicians have never done.