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Invensys - Network 8000  

Local Control Module (LCM)

Secondary Control Units
Local Control Module (LCM)
Date Last Saved: 6/1/2007 2:41:13 PM

Product Name(s): Local Control Module (LCM)
Product Description: The LCM is a general purpose, custom programmable, 18 I/O, fixed point secondary controller. Schedules and limited trend data are maintained on the board. An optional keypad and display is available.
Product Application(s): The LCM is intended for general HVAC equipment and small plant control applications. It is commonly used as a stand-alone controller for remote or smaller DDC control applications where GCMs are not required (although multiple LCMs can be networked through a GCM supervisory controller). When located remotely, communications are provided to the workstation via modem.
Point Quantity Characteristics
Analog Input (AI): See below 0-12 Vdc user selectable range

4-20 mA w/250W resistor

Digital Input (DI): 2 8 Hz pulse
Universal Input (AI or DI):
Analog Output (AO): See below 0-12Vdc
Digital Output (DO): See below Dry contact

Plug-in relay (optional)
Universal Output (UO):
A/D Converter Resolution
8 bit
10 bit
12 bit
16 bit
D/A Converter Resolution
6 bit
8 bit
10 bit
No Analog Output
HOA switches provided on each output?
Note: These are also available as an add-on from 3rd party vendors.
Both AO and DO
DO Only
Indicating status LED on each output?
AO and DO
AO Only
DO Only
Integral Flow Sensor?
Integral Damper Actuator?
Can controller accept occupant override from thermostat?
Can controller accept occupancy sensor input?
Expander Boards None
Network Ports, Protocol(s), and Speed(s) Supported
(Note: See 'Architecture' for network details)
(1) - (Optional). Proprietary to secondary LCM Bus @ 19.2 kbps (peer-to-peer). Optional card can be added to access LCM Bus
External Communication Ports, Speeds and Access Devices (1) - Proprietary EIA-232 Serial port for modem or PC up to 9.6 kbps
Additional Information (Optional) The LCM is typically used in standalone applications without a GCM; the optional card allows it to be used with other LCMs and/or a GCM.
Network Accessing Capabilities via Controller
Access controller only
Access controller plus additional controllers on network segment / LAN
Access all controllers on system
No access available on this controller
Other Information not provided
Controller Access Devices
Local Display Panel (controller-mounted)
Local Display Panel (zone-mounted)
Handheld Interface Device (proprietary device)
PDA (3rd-Party HID)
Zone-Based port (details below)
Zone-Based Interface Access Information not provided
Zone Interface Hardware
Zone-Mounted touchpad (thermostat or stand-alone display)
HID (proprietary device)
PDA (3rd party HID, with software)
*Note: This section covers the capabilities for accessing the controller or other parts of the network from the controller (i.e. 'bottom-up').
Standard access functionality is covered in the Architecture and Software sections.
**Does NOT include front-end OI functions. See vendor for specific functions available.
Functions Available Through Field Interface**:View ParamsChange ParamsChange
O&M SupportTAB/Cx Support
Local Display Panel (controller-mounted)
Local Display Panel (zone-mounted)
Handheld Interface Device (proprietary device)
PDA (3rd-Party HID)
Zone-Based port (details below)
Microprocessor(s) 80C88 @ 5 MHz. 16 bit
Clock Type
Powered, battery-backed
Battery powered
Powered, no battery backing
Clock Synchronization Information not provided
Volatile Memory (RAM) Capacity 480 kB RAM
Volatile Memory (RAM) Uses
RAM use unrestricted
RAM use restricted as shown below
Information Not Provided
Program Execution / Calculation storage
Data / Trends / Alarms storage
Configuration / Parameter storage
Control Programming storage
Is Volatile Memory Supported By Battery? Yes
Battery Type(s) Lithium
Battery Life Information not provided
Backup Battery Operating Time Information not provided
Non-Volatile Memory Capacity (EEPROM/Flash)* 32 K or 8K of EEPROM depending on model.
Non-Volatile Memory Uses
Data / Trends / Alarms / Calculation Storage
Configuration / Parameter Storage
Control Programming Storage
Controller Operating System
Additional Information
* Items in NV memory are not lost upon power or battery failure. Other types of NV memory such as EPROM, NOVROM, etc. do not directly impact system performance.
Can trend data be stored in this controller? Yes
How many total trend values can be stored? Controller trend value storage limited to 48 analog values and 10 digital changes of state.
What is the controllers role in trending? Controller can store limited on-board trends, but trends can be called at specified intervals by the GCM and archived at the workstation.
Can controller be programmed to 'push' data to archive or are trends 'pulled' from controller?
When full, does controller automatically send up trend data, overwrite data, or stop logging data? If controller trend data buffer fills before being called by archive workstation, old data is overwritten
Programming Method(s) Uses Network 8000 Object Block programming. 'Object Blocks' are available for many common DDC control routines, and custom Object Blocks can be written and used in programming when required. Block parameters and values are left as template-based inputs by the user.
Resident vs Non-Resident Program Execution Local control loop logic is resident at the controller. Schedules, trending, data control, and global point sharing requires GCM supervisory interface.
Resident/Supervisory. This controller supervises the scheduling of other controllers.
Resident/Stand Alone. This controller contains its own schedule.
Non-Resident. This controller is dependent upon another controller for its schedule.
None. This controller has no scheduling features.
Resident Energy Management
Energy management algorithms for this controller can be custom programmed
Pre-programmed/built-in algorithms available, and are fully editable using custom programming
Pre-Programmed/built-in with limited editing via template-based programming
Controller is not typically used for energy management functions
Specific Pre-Programmed Algorithms Available
None (custom programming only)
None (not applicable)
Optimal Start/Optimal Stop
Peak Demand Limiting/Load Shedding
Economizer (enthalpy, dry-bulb, CO2, modulating/2-position, etc.)
Other Information not provided
Additional Energy Management functions are resident at SI
Additional Programming Functions
DDC Loops (P, PI, PID) PID
Automatic PID Tuning Feature Information not provided
Automatical-Dial Alarm Support Information not provided
Does controller perform multiple retries and buffer/store alarm until connection is made? Information not provided
Are multiple destinations possible? Information not provided
Upon controller power loss or hardware failure:
Are network communications affected? No
Is loss recognized on/by the network and alarm reported? Yes
DO and AO response?
Outputs fail to a user pre-specified position
Outputs fail to a normal (unpowered) position
Outputs fail to last position
Volatile memory functions?
Retained for life of backup battery
Upon restoration of power does the controller:
Auto-reboot without operator intervention? Yes. Special reboot control functions can be programmed to accommodate component sequencing.
Automatically reset/synchronize the clock? Yes
Update all monitored functions? Yes
Generate an alarm if backup battery is dead? Information not provided
Upon network or communications failure does controller:
Continue to operate standalone? Yes
Operate with last global settings or user-specified value? N.A.
Do broken network segments continue to communicate within the remaining segment?
(Note: May depend on proper termination of segments for higher speed networks.)
Information not provided
Does network automatically reconfigure upon restoration? Yes - Communications between controllers is automatically restored upon network reconnection.
Does network store 'loss of communications' alarm with time of event? Yes
Additional Information (optional)
Self Test Diagnostics
Does controller have internal self-test diagnostics to check:
Processor failure? Information not provided
Internal hardware failure? Information not provided
Open/shortened sensor? Information not provided
Control Enclosure NEMA 1 (Standard)
Power Supply Required
Voltage 24 Vac
VA 30 VA
Surge Protection Provided
Underwriters Laboratories UL 916 PAZX (Energy Management)
FCC Part 15, Sub-Part B, Class A
LonMark Certified
No - but LonWorks compatible
Information not provided
BACnet (BTL) Certified
Not submitted for testing
Information not provided