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| Parameter
| Meaning
| Unit
| Default value |
|---|
| High level of the communication tracing. It shows the read values of I/O tags and other debug information. | YES/NO | NO |
| A time interval. After it passes, a re-open action over the interface will be done. 0 (zero) disables this function. | min | 0 |
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Neuron ID is an optional address parameter. If it is defined, this address executes the polling of the network variables of the node. Neuron ID address is in the hexadecimal form.
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- "Group Addressing" parameters:
- ID specifies a group ID in the domain (the decimal number ranging from 0 to 255).
- Member is a member ID of a target node in this group (the decimal number ranging form from 0 to 63).
- Size is a group size (2 up to 64). The group size is unlimited when you set 0 (zero).
- "Broadcast Addressing" parameters:
- Subnet defines a network ID to which a broadcast message is sent. Set a required value Domain.
- Backlog is an estimated number of ACKD responses or request/response messages.
Parameter description from the literature 1: This field specifies an estimate of the channel backlog that would be created by an acknowledged or request/response message broadcast using this address. It should be set to the expected number of acknowledgements acknowledgments or responses. For example, this might be the worst-case number of nodes expected to respond to a message on a channel. If this is unknown, this field can be set to zero in which case a backlog of fifteen is assumed.
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| Kotva |
|---|
| stanica_parametre |
|---|
| stanica_parametre |
|---|
|
Station protocol parameters
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They have effect on influence some optional protocol parameters. The following station protocol parameters can be defined:
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| Full name | Meaning | Unit | Default value |
|---|
| Value of the parameter is written into the address array SendAddrDtl when the packets "Poll request" and "Write NV value" are sent. See the See Note 1.
Parameter description from the literature 1: This field specifies the time interval between repetitions of an outgoing message when unacknowledged–repeated service is used. | - | 3 |
| Value of the parameter is written into the address array SendAddrDtl when packets "Poll request" and "Write NV value" are sent. See the See Note 1.
Parameter description from the literature 1: This field specifies the number of retries for acknowledged, request/response, or unacknowledged–repeated service (0–15). The maximum number of messages sent is one more than this number. | - | 1 |
| Value of the parameter is written into the address array SendAddrDtl when packets "Poll request" and "Write NV value" are sent. See the See Note 1.
Parameter description from the literature 1: This field specifies the time interval between retries when acknowledged or request/response service is used. The transaction retry timer is restarted when each attempt is made, and also when any acknowledgement acknowledgment or response (except for the last one) is received. For the request/response service, the requesting node should take into account the delay necessary for the application to respond when setting the transaction timer. | - | 3 |
| Timeout for receiving the respond on response to the polling demandrequest. Total time is tx_timer * retry + Response timeout. | ms | 500 |
| Timeout for receiving the confirmation of the sent packet with a new value. Total time is tx_timer * retry + WAT. | ms | 1500 |
| If its value is YES, writing new values into the network do does not wait for confirmation (with Writte Write ACK Timeout). They are immediately acknowledged as received. | YES/NO | YES |
Skip Reading after Failed Polling | If the value is YES, the reading of I/O tag values is stopped by the polling on the given station (node). It helps to speed up the value reading form from the network variables when some nodes do not communicate (they are switch switched off). The communication is not delayed because of waiting on for the responses of polling from a non-functional node. The polling always starts properly but in a usual way, however, after the first error in reading by polling the reading of the remaining network variable is interrupted and the next node is read. | YES/NO | NO |
The parameters
rpt_timer,
retry and
tx_timer can get values ranging from 0 to 15. Conversion table for times in milliseconds is stated in the document
LonWorks communication line configuration and in the
literature nr.1.
I/O tag configuration
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I/O tag address consist consists of:
- Selector - required parameter - basic identifier of the I/O tag within the range of 0..16383, as a decimal number or as a hexadecimal number with a prefix # , (e.g. #3A).
- Type - value type of the network variable, required, options are: SNVT, ushort (1 byte, unsigned), short (1 byte, signed), ulong (2 bytes, unsigned), long (2 bytes, signed), float_type (4 bytes IEEE-754), analInp (a special format Weidmuller), long_4 (4 bytes, signed) or struct (1 and more bytes).
- SNVT - if you select the SVNT type in the parameter Type, then you must define a SVNT type number (0..255), as a decimal number.
- Bit - if you select the I/O tag type either Di or Dout, you can define a number of the bit within the frame of a 2-byte value word (0..15).
- Poll - allows the network variable polling. Polling is performed within the interval according to the station time parameters (polling parameters).
- Priority - indicates a higher priority for writing and polling (in terms of LonWorks network communication).
- Authentication - enables the authentication for the network variable writing and polling.
- Service - for output I/O tags, you must define a type of the network communication for writing (ACKD, UNACKD_RPT, UNACKD); standard secured transmission type ACKD.
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- Connect to LON device:
a) either by entering the hexadecimal 6-byte Neuron ID via the menu "A -- (A)dd device to list."
b) or by pressing the service pin on the LON device, which causes the message "Received an ID message from device x" to apperappear.
Then select the appropriate device via the menu "G -- (G)o to device menu....". - Read configuration information via the menu "C -- Application (C)onfiguration structures.
- Read the list of network variables via the menu "N -- (N)etwork Variable configuration table.".
The list contains indexes of variables, their selectors, direction (in/out), and other parameters. - Read values of individual network variables via menu "P -- (P)oll network variable.".
- Save the list of network variables in HC format to the file via the menu "L – (L)ist network variables."
- Save the XIF file to the interface file via the menu "X -- Create device interface ((X)IF) file."
Additional information about the LON device and individual variables can be read from the interface file.
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- Ver. 1.0 – October 27th, 2000 – Creating of the document.
- Ver. 1.1 - January 25th, 2011 - Updating of the document.
- Ver. 1.2 - October 25th, 2012 - Updating of the document.
- Ver. 1.3 - December 5th, 2019 - Hexadecimal notation of Selector, a note about nodeutil.
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