| Keyword | Full name | Meaning | Unit | Default value |
|---|
| Command Confirm | Confirmation of control ASDU.
If CMDC=0, the process D2000 KOM does not confirm any control ASDU from the partner station using backward sending ASDU with other CauseOfTransmission.
If CMDC=1, the process D2000 KOM confirms control ASDU with CauseOfTransmission=7 (Activation Confirmation).
If CMDC=2, the process D2000 KOM confirms control ASDU with CauseOfTransmission=10 (Activation Termination).
If CMDC=3, the process D2000 KOM confirms control ASDU with CauseOfTransmission=7 and CauseOfTransmission=10. | - | 1 |
| The parameters are intended for configuration of communication station for communication between two D2000 systems with using ASDU 252 - D2000 Unival (Ipesoft's implementation). more ... |
| D2000 64-bit Historical Values | When sending the historical values (as an answer to request for historical data), it uses ASDU 249, which uses 64-bit representation of floating points (the same as D2000 internally), instead of ASDU 251 (which encodes the values as 32-bit floating points) to improve precision.
Note: Before enabling this parameter, you should verify that also the client supports ASDU 249. This support was implemented in November, 2011 for D2000 v8.00.011. | - | False |
| Debug Input | A mask for debug levels of input data. The meaning of bits is as follows:- 1.bit - displays a number of incoming values during General Interrogation
- 2.bit - displays all incoming values
- 3.bit - balanced mode: requesting Interrogation command was received
| - | 0 |
| Debug Output | A mask for debug levels of output data. The meaning of bits is as follows:- 1.bit - balanced mode: displays a number of outgoing values during General Interrogation
- 2.bit - displays all outgoing values
| - | 0 |
| End of initialization | If EOI=0, the process D2000 KOM doesn't send ASDU 70 (End of initialisation). If EOI=1 and a client sends U-frame StartDT Act, the process D2000 KOM responses StartDT Con and sends ASDU. | - | 0 |
| GI Send New | If GISN=True, then the process D2000 KOM after receiving the command General Interrogation sends also values with more recent times than is the time when the command is received. The value of the parameter GISN must be True to send values with more recent times using the command General Interrogation. | - | False |
| Ignore Control Field 3bit 0 | Determines behaviour, if ASDU contains Control Field (Receive set bit 1 (test))in 3. byte.- if ICF3=False (default), ASDU content is to be processed
- if ICF3=True, ASDU content is to be ignored
The feature is usable when creating a redundant TCP connection (TCP Redundant line + IEC 870-5-104 protocol). It is enough to provide, that active (hot) client sends ASDU without the Test bite set and passive (standby) client sends ASDU with the Test bite set. | - | False |
| Ignore Invalids on Interrogation | if this parameter is set on a station, the process D2000 KOM will not send as a reply for ASDU 100 and 101 (Interrogation / Counter interrogation command) values of I/O tags which are Invalid or Unknown. Parameter can be used e.g. when controlling, if sending Invalid values causes breakdown of control. | - | False |
| Ignore Tests | Determines behaviour, if ASDU contains 1 bite (test) set in CauseOfTransmission.- if IT=0 (default), ASDU content will be processed
- if IT=1, ASDU content will be ignored
- if IT=2, there will be set weak attribute
The feature is usable when creating a redundant TCP connection. It is enough to provide, that active (hot) client sends ASDU without the Test bite set and passive (standby) client sends ASDU with the Test bite set. | - | 0 |
| Ignore Unknown Addresses | If IUA=TRUE, the process D2000 KOM will not show an error on its console or write it into log files in case that incoming value has the address not matching any of the addresses of I/O tags defined in the D2000 system. | - | False |
| Implicit Interrogation | Balanced mode: After connecting the client, there are automatically sent the values of all variables without ASDU 100 and 101 [Interrogation/Counter Interrogation Command] requests. | - | False |
| Interrogation Covers Counter Interrogation | As a reply to Interrogation, there are also sending ASDU 15,16,37 (Integrated Totals), which are by default requested by ASDU 101 [Counter Interrogation]. | - | False |
| Interrogation Groups Objects | Optimisation of sending values during General Interrogation (answer to Interrogation Command / Counter Interrogation Command). If IGO=True, multiple values will be sent inside a single ASDU (so that the length of ASDU is within maximum defined by standard - 253 Bytes). This parameter does not influence change-based sending of values during normal communication. | - | False |
| Interrogation WithOut Timestamps | If IWOT=True then values sent as a response to ASDU 100 [Interrogation Command] will be sent as ASDUs without timestamps.
For example instead of ASDU 2 (Single-point information with time tag) or ASDU 30 (Single-point information with time tag CP56Time2a) ASDU 1 (Single-point information) will be sent.
This behaviour is suitable in situation when the values have been invalidated as a result of communication error and after the communication is re-established the values come with old timestamps which causes problems in archive (if the values change only rarely, calculated archives depending on them will be also invalid till a new value arrives). At the same time, this behavior is strictly according to the IEC standard, which says that the response to Interrogation should not use ASDUs with time stamps. | - | False |
| K | Sending window size i.e. packet quantity, which is sent by the process D2000 KOM without receiving a confirmation (S-frame or I-frame). According to the standard, the default value is 12. | - | 12 |
| Maximum Clients | Maximum number of connected clients. Parameter is needed for D2000 OpenVMS, where a task pool containing 2 * MC tasks for client handling (one task for receiving data, one task for sending data) is created during KOM startup. If a value of parameter Maximum Clients is equal to 0, number of clients is not limited and threads are created dynamically as needed. | - | 0 |
| No Flags | If the value of the parameter is True, then the status bit of incoming ASDUs is ignored and not saved into the flags FA...FH. Flags of output I/O tags are also ignored and they not set the status bit. | - | False |
| Order of IC | Balanced mode: Sending sequence of ASDU 100 [Interrogation Command] when initializing the connection. If OIC<OCIC, then ASDU 100 is sending before ASDU 101. If OIC= 0, ASDU 100 is not sending. The parameter can be defined and valid specially for each of the stations. | - | 0 |
| Order of Counter IC | Balanced mode: Sending sequence of ASDU 101 [Counter Interrogation Command] when initializing the connection. If OIC<OCIC, then ASDU 101 is sending before ASDU 100. If OIC= 0, ASDU 101 is not sending. The parameter can be defined and valid specially for each of the stations. | - | 0 |
| Pessimistic Write | Defines the evaluation of writing success in case of connection of more than one client. If PW=0, writing a value is consider to be successful, if at least one client confirms it (confirmation method is defined by the parameter CMDC). If PW= 1, writing must be confirmed by all connected clients. If at least one client doesn't confirm it (e.g. connection failure occurs or the confirmation is negative), writing is consider to be unsuccessful. | - | 0 |
| Send sequence number | Initial SSN. According to the standard, having established the connection the SSN is set to 0, other than zero could be appropriate e.g. for testing. | - | 0 |
| Standby Keep Open | If True - after transition of the process D2000 Server, the process D2000 KOM is connected to, from the HOT status to the STANDBY status (redundant system), connections with clients will not be closed and receiving the clients will not be terminated. | - | False |
| Standby Set Control Field | If True, - after transition of the process D2000 Server, the process D2000 KOM is connected to, from the HOT status to the STANDBY status (redundant system), there will be sent the value of 1 in the lowest bite of 3.byte of Control Field of Information APDU (APDU containing data) instead the standard value of 0 (according to the standard). The behaviour doesn't strictly follow the standard and if possible, use the parameter SST instead of this. | - | False |
| Standby Set Test Bit | If True - after transition of the process D2000 Server, the process D2000 KOM is connected to, from the HOT status to the STANDBY status (redundant system), there will be sent Test bit set in Cause Of Transmission. | - | False |
| Standby Write Values | If True - after transition of the process D2000 Server, the process D2000 KOM is connected to, from the HOT status to the STANDBY status (redundant system), the server will send new values to clients. | - | False |
| W | Quantity of received packets, after which the process D2000 KOM sends a S-frame confirmation. According to the standard, the default value is 8. There must be true w < k, the standard recommends w = 2/3 * k. | - | 8 |
| Wait Timeout T1 | Timeout for receiving the confirmation of a I-frame sent (either the confirmation within the I-frame or the S-frame itself) or a U-frame. If the process D2000 KOM doesn't get the confirmation in the time WT1, it closes the TCP connection. According to the standard, the WT1 default value is 15000 ms. | ms | 15 000 |
| Wait Timeout T2 | Timeout for sending the confirmation of a I-frame received. WT2 < WT1. If another I-frame (which confirms the I-frame received) is not sent in the time WT2 since the I-frame was received, so the process D2000 KOM sends a S-frame confirming the received I-frame to the partner. According to the standard, the WT2 default value is 10000 ms. | ms | 10 000 |
| Wait Timeout T3 | Timeout for sending test frames (U-frame TEST ACT). If no data are sent in any direction for a long time, an U-frame TEST ACT will be sent to the process D2000 KOM after expiration of the WT3 time and there is expected (in the WT1 time after sending) receiving a U-frame TEST CON. If the WT3 on the partner side is set to a lower value, it sends the test frames and the process D2000 KOM replies to them. According to the standard, the WT2 default value is 20000 ms. Setting the value to 0 disables sending test frames. | ms | 20 000 |
| Wait Timeout No answer | Balanced mode: Timeout for receiving the confirmation of a sent value for ASDU in the direction of control (ASDU 45 - 64). Receiving e.g. S-frame with RSN (Receive Sequence Number) confirming, that the other party received previous I-frame doesn't mean, that the I-frame was processed. In the WTn time, the process D2000 KOM waits for receiving the response (e.g. after sending ASDU with TypeIdentificator=45 [Single Command] with CauseOfTransmission=6 [Activation] there is expected receiving Single Command with CauseOfTransmission=7 [Activation Confirmation].
After the expiration of the WTn time, the process D2000 KOM closes the TCP connection. | ms | 60 000 |