Modbus Protocol Guide for ModuLaser Aspirating Systems

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Trademarks and patents The ModuLaser name and logo are trademarks of Carrier. Other trade names used in this document may be trademarks or registered trademarks of the manufacturers or vendors of the respective products.

Manufacturer Carrier Manufacturing Poland Spółka Z o.o., Ul. Kolejowa 24, 39-100 Ropczyce, Poland. Authorized EU manufacturing representative: Carrier Fire & Security B.V., Kelvinstraat 7, NL-6003 DH, Weert, The Netherlands.

Version REV 01 – for ModuLaser command display modules with firmware version 1.4 or later.

Certification CE

Contact information and product documentation For contact information or to download the latest product documentation, visit firesecurityproducts.com.

Important Information

Scope The purpose of this guide is to describe the Modbus holding registers used with ModuLaser command display modules to monitor ModuLaser aspirating smoke detection systems. This guide is a technical reference for experienced engineers and contains terms that do not have accompanying explanation and understanding may require an in-depth appreciation of the technical issues involved.

Caution: Read this guide, all related product documentation, and all related Modbus protocol standards and specifications entirely before creating Modbus applications.

Limitation of liability To the maximum extent permitted by applicable law, in no event will Carrier be liable for any lost profits or business opportunities, loss of use, business interruption, loss of data, or any other indirect, special, incidental, or consequential damages under any theory of liability, whether based in contract, tort, negligence, product liability, or otherwise. Because some jurisdictions do not allow the exclusion or limitation of liability for consequential or incidental damages the preceding limitation may not apply to you. In any event the total liability of Carrier shall not exceed the purchase price of the product. The foregoing limitation will apply to the maximum extent permitted by applicable law, regardless of whether Carrier has been advised of the possibility of such damages and regardless of whether any remedy fails of its essential purpose. Installation in accordance with this manual, applicable codes, and the instructions of the authority having jurisdiction is mandatory. While every precaution has been taken during the preparation of this manual to ensure the accuracy of its contents, Carrier assumes no responsibility for errors or omissions.

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Advisory messages Advisory messages alert you to conditions or practices that can cause unwanted results. The advisory messages used in this document are shown and described below.

• WARNING: Warning messages advise you of hazards that could result in injury or loss of life. They tell you which actions to take or to avoid in order to prevent the injury or loss of life.
• Caution: Caution messages advise you of possible equipment damage. They tell you which actions to take or to avoid in order to prevent the damage.
• Note: Note messages advise you of the possible loss of time or effort. They describe how to avoid the loss. Notes are also used to point out important information that you should read.

Modbus Connections

Connections Communications are maintained via Modbus TCP using a ModuLaser command display module.

Figure 1: Connection overview The diagram shows a central 'Command Module' connected via Modbus to a network of devices. These devices appear to be aspirating smoke detectors or related modules, depicted as various units with tubing and connections. A laptop icon is also shown, suggesting a connection point for configuration or monitoring via Modbus.

Command display module configuration Modbus is available for ModuLaser command display modules with firmware version 1.4 or later. To ensure full compatibility, we recommend that all modules in a network are updated to firmware version 1.4 if any module in the network has firmware version 1.4 (or later). By default Modbus functionality is disabled. Enable Modbus from the command display module TFT display menu or by using the Remote configuration application (version 5.2 or later). Modbus connections may be configured from a single point by specifying the destination IP address. Indicating 0.0.0.0 allows Modbus connection to the network from any accessible point.

Timing Considerations

Reading and writing holding registers is a synchronous operation. The table below gives the minimum times that must be maintained between consecutive operations. For optimum reliability, third-party software should conform to these specifications.

Caution: Do not send multiple operations without first receiving a response from the device.

Register Mapping

Global Register Map

ModuLaser Network Status

Consists of 1 holding register.

The register is divided into two bytes.

The lower byte represents the ModuLaser network status, as shown in the table below.

Device Status

Consists of 127 holding registers.

Each register is divided into two bytes. The lower byte represents the status of a single device, as shown in the table below.

ModuLaser Network Faults and Warnings

Consists of 1 holding register.

The register is divided into two bytes. The lower byte represents ModuLaser network faults and the upper byte network warnings, as shown in the table below.

Device Faults and Warnings

Consists of 127 holding registers.

Each register is divided into two bytes. The lower byte represents a device fault, as shown in the table below.

Detector Output Level

Caution: Only valid for detector device addresses and only when the detector is not signalling a fault.

Consists of 127 holding registers.

Each register is divided into two bytes. The lower byte contains the value of a single detector output level, as shown in the table below.

Network Revision Number

Consists of 1 holding register.

The register contains the revision number of the ModuLaser network, as shown in the table below.

Execute Reset

Executes the Reset Display in the ModuLaser network (write any value to reset alarms or faults).

The register is divided into two bytes.

Execute Device Enable/Disable

Toggles the enable/disable status for a device (write any value to toggle the enable/disable status).

If the device is enabled, then the Write Single Register to the CONTROL_ISOLATE register disables the device. If the device is disabled, then the Write Single Register to the CONTROL_ISOLATE register enables the device.