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A text string describing the communication station. Maximum: 128 character.
There is possibility to use the Dictionary (to open it, press CTRL+L).
Value type
Selection of an object value type. For communication station it is St-Station.
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The selection of one of four modes of the communication line. For lines of Serial, "Serial Line Redundant", "Serial System&Line Redundant" and "Moxa IP Serial Library" categories, there is possible to define several sets (up to 4) of communication parameters. The value of Line mode parameter determines, which of the sets will be used for communication with this station.
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If the parameter is checked, the values of I/O tags, the parent of which is the station, will be Invalid when the station is off (the state StOFF). Otherwise, the values of I/O tags are the last values before switching off the station.
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The communication may be controlled in several ways. Check the Manual option to enable the controlling the station via the dialog box in process D2000 HI. The disabled communication option allows to enable (disable) the communication in Manual mode. The Control object option enables to select the object that controls the communication in case that the station is in the automatic mode. The control object must be of Boolean type.
| Control object value | Station behaviour |
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| TRUE | Delay of requests for communication. The requests for output are postponed. |
| FALSE | Normal communication without any limits. |
OnError behaviour
A behaviour of station after an error is determined by the
Time filter and Delay after error spin buttons (set in milliseconds). If the station does not communicate, it will pass from NORMAL state to COMM_ERR (soft error). If the communication is not restored even after expiration of time corresponding to the value of Time filter option, the station is passed to HARD_ERR (hard error). The Delay after error parameter determines how long after passing to HARD_ERR there will be no communication with the station.Kotva casovy_filter casovy_filter
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The parameters, dependent on the protocol, determine its behaviour during communication with this station. The parameters should be entered into the input field in the form:
PRM1=value;PRM2=value etc.
PRM1, PRM2 - names of parameters
More information about protocol parameters...
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The communication process obtains new values by a periodic polling of stations.
Period [Hours:Minutes:Seconds] - definition of the period which determines the acquisition of new values of station I/O Tags. The period exactly determines the time of sending the request. The period is defined by Hours:Minutes:Seconds and Offset in seconds. For example the period 0:1:0 with the offset 5 seconds will cause the polling in every fifth second of each minute.Kotva period period - Delay [Hours:Minutes:Seconds] - after executing a request, the time of the next request is calculated as the sum of the current time and Delay parameter.
The settings of Delay 0:0:0 is forbidden for any other priority than the lower one (0), because there is a possibility that other stations never can use the communication.
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Some communication protocols allow to set the real time into a device. To enable the real-time setting, check the Enable option and enter the period in the form of Hours:Minutes:Seconds, which determines the time of the next station synchronization (it works similarly to Delay parameter for polling). If the communication protocol does not support the time synchronization of station, the request is ignored.
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A priority is assigned to each station. It solves the potential conflicts of the access to communication medium (line) - Polling priority option. For station, there is possible to define one of the five priority levels:
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The parameter is implemented only for the some of communication protocols that support timestamps:
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- , M-Bus Rev. 4.8, MODBUS Client, Telegyr 809 Server
- the protocols of the IEC104 (IEC 870-5-104, IEC 870-5-104 Server, IEC 870-5-104 Sinaut) and IEC101 classes (IEC 870-5-101 unbalanced primary, IEC 870-5-101 unbalanced secondary)
- IEC 61850, IEC 60870-6 ICCP/TASE.2
If the checkbox is checked, then:
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This parameter activates the filter that checks the time stamp of I/O tags new values on this station. The new value is ignored if the time stamp is older by defined number of days and hours than the current real-time of communication station. The log about this is saved into the application directory, subdirectory TRACE, file DISCARDED_VALUES_SELF_KOM.log (for SELF.KOM) or DISCARDED_VALUES_name_KOM.log (for name.KOM).
Ignore values newer than ...
This parameter activates the filter that checks the time stamp of I/O tags new values on this station. The new value is ignored if the time stamp is newer by defined number of days and hours (i.e. it is in the future) than the current time of communication station. The log about this is saved into the application directory, subdirectory TRACE, file DISCARDED_VALUES_SELF_KOM.log (for SELF.KOM) or DISCARDED_VALUES_name_KOM.log (for name.KOM).
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The editing is allowed only in column Value. It enables to set the requested value of parameter. The changed values (they are different from the default value) are highlighted by red color. Click on the "Def" button if you want to return the setting of values of one or more selected parameters on default one. The "Def" button is placed below the list of protocol parameters together with the info button.
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