Configuration of the RCOM Protocol Interface¶
In the device tree, double-click the RCOM (RCOM/RCOM+) node.
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The following parameters are available:
| Parameter | Default value | Value | Meaning |
|---|---|---|---|
| Operation mode | RCOM+ master | RCOM+ Master | The Communication Module works as a master device in an RCOM+ network. |
| RCOM+ Slave | The Communication Module works as a slave device in an RCOM+ network. | ||
| RCOM Master | The Communication Module works as a master device in an RCOM network. | ||
| RCOM Slave | The Communication Module works as a slave device in an RCOM network. | ||
| Address (NODE) | 0 | 0…254 | Address (node number) of the Communication Module. |
| Baudrate | 9600 baud/s | 300 600 1200 2400 4600 9600 19200 |
Transmission rate in Baud per second. |
| Parity | None | None | No parity check is used for telegram transmission. |
| Odd | Odd parity check is used for telegram transmission. | ||
| Even | Even parity check is used for telegram transmission. | ||
| CDLY | 0 | 0 | Value for carrier delay. The value will be converted internally into [ms] according to the specified baud rate. |
| Character timeout | 30 | 30 | Value for character timeout. The value is internally converted into [ms] according to the specified baud rate. |
| Turnaround time | 4000 | 4000 | Turnaround time to calculate timeout [ms]. |
| Type of modem | Direct connection | Direct connection | Setting for direct connections. |
| Fixed line modem | Setting for usage of fixed line modems. | ||
| Installed RS-485 interface | Settings for usage of Hayes compatible dial-up modems. This requires the configuration of a telephone list as described below (module Telephone number). | ||
| Installed RS-485 interface | Setting for installed RS-485 interface. | ||
| Modem 23WT90 half duplex | Settings for usage of a 23WT90 modem in half duplex operation mode. | ||
| Retransmissions | 2 | 0…255 | Number of telegram retransmissions after a reply was not received from the corresponding slave. |
| Max. number of polls | 3 | 0…255 | Number of event polls that are sent by the master during one event polling phase. |
| Number of preambles | 1 | 1…255 | Number of preamble bytes. |
| Number of postambles | 1 | 1…255 | Number of postamble bytes. This value must be equal to the number of preambles. If the values are different, the Communication Module automatically sets both parameters to the configured number of preambles. |
Note
The values of the parameters TLS (line stab time) and CDLY (carrier delay) are dependent on the length of the line and the type of modems used and might vary from system to system.
Parameter TLS always must be higher than parameter CDLY.
If a dial-up connection is used for the RCOM network, proceed with dial-up configuration. If no dial-up configuration is used, skip this section.