...
The following station protocol parameters can be defined:
| Keyword | Full name | Meaning | Unit | Default value |
|---|
| Address Scan Mode | Each reading of values increments the station address. This mode can be used to find a device with an unknown address. | - | No |
| Retry Count | Request repetition count in case of a communication error. | - | 2 |
| Retry Timeout | Delay between request repetition in case of a communication error. | ms | 100 ms |
| Wait First Timeout | First waiting for a response after sending the request. | ms | 800 ms |
| Wait Timeout | Delay after transmitting the request before reading the response. | ms | 500 ms |
| Max Wait Retry | Repetition count of response readings till its finalization. | - | 40 |
|
| Wait After SND_NKE Broadcast | Delay after sending a broadcast SND_NKE, before reading from the first station on a communication line. | ms | 8000 ms |
| Wait before REQ_UD2 Request | Delay before sending the REQ_UD2 request to a slave. | ms | 4000 ms |
| Set FCB Bit after SND_NKE | The parameter specifies whether an FCB bit in a first request after sending SND_NKE should be set to 1 (YES) or 0 (NO). | - | YES |
| Accept Following Records (0=disable,255=read all) | If the slave station has Variable Data available, the parameter specifies the number of records read during one polling of the station. A value of 255 means that all available records will be read. | - | 0 |
| Send Application Reset before REQ_UD2 | Optional sending of "application reset" message (50h) prior to reading the values from the station. | - | NO |
| WakeUp Length | Length (given in characters) of the so-called wake-up message sent before each request. Value 0 disables the sending of the wake-up message. | bytes | 0 |
| WakeUp Delay | The delay between the wake-up message and a request. | ms | 400 |
| Accept Reply To Broadcast | If the station has address 254 (according to the protocol definition it is a broadcast address to which stations can respond), this parameter allows processing the response from any station. The practical use is on lines with a single station - in case of its exchange, it is not necessary to find out the address of a new device. | - | YES |
|
| Full Debug | Enables debug logs on the communication and acquired data. | - | NO |
|
| Multical III | Enables decoding the Manufacture specific data of Multical III device. | - | NO |
A string containing the protocol parameters is defined as follows:
...
- Ver. 1.0 - June 26th, 2000 – document Document creation.
- Ver. 1.1 – November 9th, 2000 – testing Testing Danfoss CALSTREEM.
- Ver. 1.2 – December 14th, 2000 – Change of the outputs AUX1 and AUX2 from Ci to Ai
- Ver. 1.3 - November 22nd, 2005 - Redesigned by M-Bus Rev. 4.8.
- Ver. 1.4 - March 10th, 2021 - Added "Accept Reply To Broadcast" parameter
...