Honeywell C-Bus communication protocol
Supported device types and versions
Communication line configuration
Communication station configuration
I/O tag configuration
Installing of driver KMFB02CB
Literature
Changes and modifications
Document revisions
Supported device types and versions
This protocol supports the communication with Honeywell devices based on the communication bus C-Bus.
It supports Honeywell devices, series EXCEL (XL20, XL50, 500,....).
Communication line configuration
We used ISA card KMFB02 (Incos a.s. Zilina) with firmware Ipesoft s.r.o. Zilina (stored in EPROM), which is a physical communication interface. The communication is executed on baud rate 4800 Bd, 9600 Bd or 19200 Bd. The card must have the driver KMFB02CB.SYS.
- Communication line category: Honeywell C-Bus.
- Line parameters (C-Bus tab).
- Device ID – is C-Bus Id which is assigned to KMFB02 card. It must be unused number in the range of 1 to 30, kept for KMFB02 in C-Bus network.
- Baud rate – is a baud rate of C-Bus. Supported baud rates: 4800, 9600 and 19200 Bd.
Communication station configuration
- Communication protocol: Honeywell Excel C-Bus
- Station address is C-Bus Id of device in the range of 1 to 30.
- You can execute an automatic synchronization of real time of EXCEL stations according to time of workstation. You must enable the synchronization and set "Synchronization period" of real time on tab "Time parameters" in configuration dialog box for station. The recommended period is 3 to 12 hours. First synchronization is done when starting D2000 KOM process.
Station protocol parameters
They influence a behavior of access to communication medium. You can define the following parameters:
Table 1
| Key word | Full name | Meaning | Unit | Default value |
|---|---|---|---|---|
| WREXP | Write Request Expiration Timeout | Parameter defines a lifetime of request for writing a new value to I/O tag. If this entry can not be done (e.g. because the communication with station does not work), the request is cancelled after elapsing this time. An error message is written into the line trace file. | sec | 60 |
| IPT | Init Point Response Timeout | Timeout until which the device must respond after sending the request for initialization of communication with I/O tag into the device. After elapsing this time, error message is written into the line trace file. | sec | 6 |
| WPT | Write Point Response Timeout | Timeout until which the device must respond after sending the request for writing the new value of I/O tag into the device. After elapsing this time, error message is written into the line trace file. | sec | 4 |
| PRP | Parameter Read Periode | Read period of parameters from EXCEL devices. The changes in parameters (e.g. through EXCEL keyboard) are not transmitted automatically but they are read according to this period. | sec | 600 |
String with protocol parameters is written according to this rule:
Key_word=value;Key_word=value; ...
Example:
IPT=10;WREXP=90;
If a key word with valid value has not been found in the initial string, default value is used according to Table 1.
I/O tag configuration
I/O tags: Ai, Ao, Di, Do, Co, TxtI, TxtO
- I/O tag address is name of I/O object that is defined in EXCEL device. It is a string of max. length 18 characters. The address can contain also the attributes.
- Reading and writing of values of EXCEL devices is done by I/O tags with the addresses:
$.Px-y
where x is a file number (0 to 127) and y is a parameter number (1 to 255) within a file. Example: $.P0-1 or $.P2-3
The reading/writing into time channels is done by I/O tags with these addresses:
| Address | I/O tag | Meaning |
|---|---|---|
| $.TPRFSH | Dout | By writing the value FALSE into this I/O tag, the reading of all information about time programs is started. The reading is finished when I/O tag acquires TRUE. |
| $.TPLx | TxtI | I/O tag acquires the name of time program with index x (the index of first time program is 1). If this time program does not exist, I/O tag has an invalid value. |
| $.TPWSx-y | TxtI | Name of weekly schedule for time program with index x and day y (y in the range of 1 to 7 for Monday to Sunday). |
| $.TPDSx-y | TxtI | Name of daily schedule with index y for time program with index x. If daily schedule with this index does not exist, I/O tag has an invalid value. |
| $.TPPLx-y | TxtI | Name of permitted object for control with index y in time program with index x. If object with this index does not exist, I/O tag has an invalid value. |
| $.TPADSPx-y-z | TxtI | Name of object in an action with index z, daily schedule with index y, time program with index x. If this action does not exist, I/O tag has an invalid value. |
| $.TPADSTx-y-z | TxtI | Execution time of action with index z, daily schedule with index y, time program with index x. If this action does not exist, I/O tag has an invalid value. |
| $.TPADSVx-y-z | TxtI | Value assigned to object in the action with index z, daily schedule with index y, time program with index x. If this action does not exist, I/O tag has an invalid value. |
| $.TPWWSx-y | Co | Record of new daily schedule in weekly schedule. Day with index y (y in the range of 1 to 7 for Monday to Sunday), time program with index x. Recorded value is the index of dail schedule which was obtained by reading with the help of address $.TPDS. |
| $.TPWDSx-y | TxtO | Writing/cancellation of daily schedule with index y in time
program x. The values:
"DEL" - cancels daily program |
| $.TPADSWx-y-z | TxtO | Writing/change/cancellation of action with index z in daily
schedule with index y, time program with index x. The values:
"DEL" - cancels the action. |
Note to the reading and controlling the time programs:
To obtain the complex information about time programs by the static measurements is virtually impossible because of their large quantity. Therefore there is enabled a dynamic change of address to read and write the time programs by Tell command SETPTADDR in all I/O tags. In combination of the active pictures, you can implement a full displaying and controlling the time programs. We created a sample template of D2000 configuration database.
- I/O tags that have not any image in EXCEL device:
| Address | I/O tag | Meaning |
|---|---|---|
| $.ALARM | TxtI | Text variable that contains the last received alarm from device (parent of I/O tag – station). |
| $.LIST | TxtI | Text variable that contains the list of objects received from device (parent of I/O tag – station). |
- I/O tags with Manual/Auto status:
- Change of Manual/Auto status by A flag of object value:
You can obtain or modify the status M/A when you configure I/O tags Di, Dout with address which contains the attribute - string ".MAN". True means that the object is in Manual status, False - the object is in Auto status. The both I/O tags must be defined so that this object could work properly. E.g. I/O tag with address "Tepl_v_Miestnosti_01" and another one with address "Tepl_v_Miestnosti_01.MAN". The change of I/O tag with ".MAN" attribute means the change Manual/Auto status of object in the device.
Manual/Auto status can be gotten or modified also by the setting of A flag in object value. The object with ".MAN" attribute is not necessary. If A flag is set, the object is in Auto status. If it is not set, the object is in Manual status.
Installing of driver KMFB02CB
Windows NT 4.0 operating system
When installing the driver of KMFB02 card, follow these steps:
- Copy KMFB02CB.SYS file into the directory \WINNT\SYSTEM32\DRIVERS on the disc with Windows NT operating system.
- Import the "registers" from KMFB02CB.REG file by the system utility regedit. Click on Start button, Run..., write regedit and press ENTER. In the menu of regedit utility click on Registry and Import registry file...". Select KMFB02CB.REG file.
- Restart your computer.
Windows 2000 operation system
For installation of driver you need these files:
kmfb02cb.inf - installation file
kmfb02cb.sys - own driver
Installation procedure:
- Log on to MS Windows 2000 as Administrator with the administrator rights.
- Click on START button -> Settings and Control panel.
- Start Add/Remove Hardware wizard.
- Click on Next button until Win2000 finishes searching the hardware.
- Choose Add a new device and click on Next.
- Choose No, I want to select the hardware from a list and click on Next.
- Choose Other devices and click on Next.
- Click on button Have a disk.
- Find kmfb02cb.inf file after clicking on Browse...
- Confirm the restart of computer.
Note: KMFB-02 card uses the INT 5 interruption, therefore it must be released if it is reserved (it is used only for the parallel port LPT2 or network LAN card) this interruption is not usually used).
Literature
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Changes and modifications
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Document revisions
- Ver. 1.0 – July 24, 2000 – Creation of document
- Ver. 1.1 - April 24, 2001 - Reading/writing of parameters and writing of real time
- Ver. 1.2 - July 13, 2001 - Time programs
Related pages: