AKO 55120 Modbus Map Alarm Instructions
- June 15, 2024
- AKO
Table of Contents
AKO 55120 Modbus Map Alarm
Product Information
Technical Specifications
- RS-485 communications: The AKOGas devices can be connected to a RS-485 communications bus with other units. The maximum distance is 1200 m.
- Baud Rate: 9600, 19200, 38400, 57600
- Data length: 8 bits
- Parity bit: No
- Stop Bits: 1 bit
Defined MODBUS Functions
- Function 1: Read holding registers
- Function 03: Read multiple logs
- Function 06: Write a log
Types of Log
- Numeric value: Represents a numeric value
- Numeric value multiplied by 10: Represents a numeric value multiplied by 10 (divided by 10 to represent correctly)
- Numeric value multiplied by 100: Represents a numeric value multiplied by 100 (divided by 100 to represent correctly)
- 2 bytes utf8: Represents texts using UTF-8 encoding
- Bit map: Each bit represents a value (0 = not active, 1 = active)
Types of Access
- Read-only: Parameters to display to the user in the parameter section
- Read and write: Parameters to display to the user in the parameter section
Parameters
| Register | Type | Access | Parameter | Description |
|---|---|---|---|---|
| 200 | N | W | MODBUS address | |
| 201 | N | W | Communication speed | |
| 202 | N | W | Number of STOP bits | |
| 203 | N | W | Parity | |
| 801 | N | R | PU Program version | |
| 802 | N | R | Pr Program revision | |
| 803 | N | R | bU Bootloader version | |
| 804 | N | R | br Bootloader revision | |
| 805 | N | R | PAr Parameter map revision |
Unit Status
| Register | Type | Access | Description |
|---|---|---|---|
| 1003 | N | W | Battery status |
| 1004 | N | R | Alarm |
| 1005 | BITS | R | Power supply status |
| 1009 | BITS | R | Alarm relay |
Product Usage Instructions
RS-485 Communications Configuration:
Physically connect the AKOGas device to a RS-485 communications bus with
other units. Ensure that the configuration of this bus matches the following
table:
| Baud Rate | Data length | Parity bit | Stop Bits |
|---|---|---|---|
| 9600**, 19200, 38400, 57600 | 8 bits | No | 1 bit |
Accessing Parameters
To display and edit the operating parameters, follow these steps:
- Locate the desired parameter in the “Parameters” section.
- Refer to the register number, type, access, and description of the parameter.
- If the parameter is marked as “W” (Write), it can be edited.
- If the parameter is marked as “R” (Read), it can only be displayed.
Consulting Unit Status:
To check the status of the unit and its alarms, follow these steps:
- Refer to the register number, type, access, and description in the “Unit Status” section.
- If the register is marked as “W” (Write), it can be queried.
- If the register is marked as “R” (Read), it can only be displayed.
FAQ (Frequently Asked Questions)
-
Q: What is the maximum distance for RS-485 communications?
A: The maximum distance is 1200 meters. -
Q: What are the available baud rates for RS-485 communications?
A: The available baud rates are 9600, 19200, 38400, and 57600. -
Q: How can I edit the operating parameters?
A: Locate the desired parameter in the “Parameters” section and refer to its register number. If the parameter is marked as “W” (Write), it can be edited. -
Q: How can I check the unit’s status and alarms?
A: Refer to the register numbers in the “Unit Status” section. If a register is marked as “R” (Read), it can be displayed to check the status and alarms. -
Q: Where can I find updated information about the product?
A: Updated information is available on our website.
Introduction
This document is aimed at describing to the user the operation of the MODBus RTU communications series protocol implemented by AKO in AKOAlarm. We should take into account that we assume that the user who wants to interact with any of our equipment with communication capacity has some knowledge of the protocol.
IMPORTANT: The functions and parameters described below are available depending to the chosen unit, for more information consult the device’s user manual.
Technical specifications
RS-485 communications
Physically speaking, the AKOGas devices can be connected to a RS-485
communications bus with other units. This is a multipoint connection where the
maximum distance is 1200* m.
The configuration of this bus should be identical to the one presented in the following table:
RS-485 SERIES CONFIGURATION
Baud Rate| 9600**, 19200, 38400, 57600
Data length| 8 bits
Parity bit| No
Stop Bits| 1 bit
Modbus protocol
- The protocol defines a network configuration where a network manager device (master) coexists with one or several slaves, up to a maximum of 32 networked devices (247 in the case of placing repeaters in the RS-485 network).
- Among the two transmission modes defined by the protocol: ASCII and RTU (Remote Terminal Unit), AKO adopts the RTU mode. It must be said that in a network of devices connected via the MODBUS protocol, devices cannot be shared using different transmission modes.
The datagram format in RTU format is:
Start frame| Address| Function| Data| CRC|
End frame
---|---|---|---|---|---
3.5 T| 1 byte (1 to 247)| 1 integer| Max. 126 integers| 1 integer| 3.5 T
Maximum length 255 bytes
- The maximum data unit is the integer (2 bytes) T is the time of transition of one character.
Defined MODBUS functions
AKO solves the management of its devices using several basic functions of the
MODBUS protocol:
| Function | Definition | Description of operation |
|---|---|---|
| 03 | Read holding registers Reading of multiple logs | |
| 06 | Preset single registers | Writing a log |
Definitions
Types of log
N| Numeric value.
Nx10| Numeric value multiplied by 10, it has to be divided by 10 to
represent it correctly.
Nx100| Numeric value multiplied by 100, it has to be divided by 100 to
represent it correctly.
UTF8| 2 bytes utf8 (to represent texts)
BITS| Bit map, each bit represents a value, 0 = not active, 1 = active.
Types of access
R| Read-only. (Parameters to display to the user in the parameter
section)
W| Read and write. (Parameters to display to the user in the parameter
section)
-
- Maximum distance at 9600 baud, the distance is reduced on increasing the baud rate.
- **Default value.
Parameters
It allows the user to display and edit the operating parameters.
Register| Type| Access| Parameter| Description|
Range| Min.| Def.| Max.
---|---|---|---|---|---|---|---|---
200| N| W| | MODBUS address| 1 – 247| 1| 1| 247
201| N| W| | Communication speed| 0 = 9600bps 1 = 19200bps 2 = 38400bps 3 =
57600bps|
0
|
0
|
3
202| N| W| | Number of STOP bits| 1= 1 bit, 2= 2 bits| 1| 1| 2
203| N| W| | Parity| 0= No parity 1= Odd 2= Par|
0
|
0
|
2
801| N| R| PU| Program version| | | |
802| N| R| Pr| Program revision| | | |
803| N| R| bU| Bootloader version| | | |
804| N| R| br| Bootloader revision| | | |
805| N| R| PAr| Parameter map revision| | | |
Unit status
Allows the user to consult the status of the unit.
Alarms
| Register | Type | Access | Description | Values |
|---|---|---|---|---|
| 1003 | N | W | Battery status | 1=Low battery 2=Battery OK 3=Battery disconnected |
| 1004 | N | R | Alarm | 1 = Error, open circuit 2= Alarm 3= No alarm 4= Short- |
circuit
1005| BITS| R| Power supply status| 1= No power supply, battery operation
2= With power supply
1009| BITS| R| Alarm relay|
- 0 = OFF
- NO C NC
- 1 = ON
- NO C NC
| | | | | | | | | | | | | | | | | | | | | | |
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AKO ELECTROMECÁNICA , S.A.L.
- Avda. Roquetes, 30-38
- 08812 • Sant Pere de Ribes.
- Barcelona • Spain.
- www.ako.com
We reserve the right to supply materials that might vary slightly to those described in our Technical Sheets. Updated information is available on our website.