| Keyword | Full name | Meaning | Unit | Default value |
|---|
| Command Confirm | Confirmation of control ASDU.
If CMDC=0, the D2000 KOM process does not confirm any control ASDU from the partner station by replying with an ASDU with an appropriate CauseOfTransmission.
If CMDC=1, the D2000 KOM process confirms control ASDUs with CauseOfTransmission=7 (Activation Confirmation).
If CMDC=2, the D2000 KOM process confirms control ASDUs with CauseOfTransmission=10 (Activation Termination).
If CMDC=3, the D2000 KOM process confirms control ASDUs with CauseOfTransmission=7 and CauseOfTransmission=10. | - | 1 |
| The parameters are intended for the configuration of a communication station for communication between two D2000 systems using ASDU 252 - D2000 Unival (Ipesoft's implementation). more ... |
| D2000 64-bit Historical Values | When sending historical values (as an answer to a request for historical data), ASDU 249 will be used, which uses a 64-bit representation of floating points (the same as D2000 internally), instead of default 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:- 0.bit - displays a number of incoming values during General Interrogation
- 1.bit - displays all incoming values
- 2.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:- 0.bit - balanced mode: displays a number of outgoing values during General Interrogation
- 1.bit - displays all outgoing values
| - | 0 |
| End of initialization | If EOI=0, the D2000 KOM process doesn't send ASDU 70 (End of initialisation). If EOI=1 and a client sends StartDT U-frame Act, the D2000 KOM process responds by StartDT Con and sends ASDU 70. | - | 0 |
| GI Send New | If GISN=True, then the D2000 KOM process after receiving the General Interrogation command sends also values with newer times than is the time when the command is received. The value of the GI Send New parameter must be True to send values with future times in a reply to the General Interrogation command. | - | False |
| Ignore Control Field 3 bit 0 | Determines behavior if ASDU contains Control Field with bit 0 (test) set in the 3rd byte (Receive).- if ICF3=False (default), ASDU content is to be processed
- if ICF3=True, ASDU content is to be ignored
The feature is useful when creating a redundant TCP connection (TCP Redundant line + IEC 870-5-104 protocol). That active client should send ASDUs without the Test bit set and the passive client should send ASDUs with the Test bit set. | - | False |
| Ignore Invalids on Interrogation | If this parameter is set on a station, the D2000 KOM process will not send values of I/O tags which are Invalid or Unknown, in a reply for ASDU 100 and 101 (Interrogation/Counter interrogation commands). The parameter can be used e.g. for control applications - if sending Invalid values causes problems in control. | - | False |
| Ignore Tests | Determines behavior if ASDU contains the highest 7th bit (Test) set in CauseOfTransmission. - if IT=0 (default), ASDU content will be processed
- if IT=1, ASDU content will be ignored
- if IT=2, a Weak attribute will be set
The feature is useful when creating a redundant TCP connection. The active client should send ASDUs without the Test bit set and the passive client should send ASDUs with the Test bit set. | - | 0 |
| Ignore Unknown Addresses | If IUA=TRUE, the D2000 KOM process 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, the values of all variables are automatically sent without any need for ASDU 100 and 101 [Interrogation/Counter Interrogation Command] requests. | - | False |
| Interrogation Covers Counter Interrogation | As a reply to Interrogation, ASDUs 15,16,37 (Integrated Totals) will be also sent, which are by default requested by ASDU 101 [Counter Interrogation]. | - | False |
| Interrogation Groups Objects | Optimization 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 the standard - 253 Bytes). This parameter does not influence change-based sending of values during normal communication. | - | False |
| Interrogation WithOut Timestamps | If Interrogation WithOut Timestamp=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 behavior is suitable in a 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 the D2000 Archive (if the values change only rarely, calculated historical values 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 D2000 KOM process without receiving a confirmation (S-frame or I-frame). According to the standard, the default value is 12. | - | 12 |
| Maximum Clients | The maximum number of connected clients. The 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 the value of the Maximum Clients parameter is equal to 0, the 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 byte of incoming ASDUs is ignored and not saved into the FAA .. .FH H flags. Flags of output I/O tags are also ignored and they don't influence the status byte. | - | False |
| Order of Counter IC | Balanced mode: Order of sending of ASDU 101 [Counter Interrogation Command] when initializing the connection. If OCIC<OIC, then ASDU 101 is sent before ASDU 100. If OCIC= 0, ASDU 101 is not sent. The parameter can be defined for each of the stations. | - | 0 |
| Order of IC | Balanced mode: Order of sending of ASDU 100 [Interrogation Command] when initializing the connection. If OIC<OCIC, then ASDU 100 is sent before ASDU 101. If OIC= 0, ASDU 100 is not sent. The parameter can be defined for each of the stations. | - | 0 |
| Pessimistic Write | Defines the evaluation of writing success in case of a connection of more than one client. If PW=0, writing a value is considered to be successful if at least one client confirms it (confirmation method is defined by the CMDC parameter). 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 considered to be unsuccessful. | - | 0 |
| Send sequence number | The initial Send sequence number after the TCP connection is established. According to the standard, having established the connection the Send sequence number is set to 0, other than zero could be appropriate e.g. for testing. | - | 0 |
| Standby Keep Open | If True, after changing the status of the D2000 Server process (the D2000 KOM process is connected to) from Hot to Standby state (in a redundant system), connections with clients will not be closed, and listening for new clients will not be aborted. | - | False |
| Standby Set Control Field | If True, after changing the status of the D2000 Server process (the D2000 KOM process is connected to) from Hot to Standby state (in a redundant system), the lowest bit of the 3rd Control Field byte of information APDUs (APDU containing data or commands) will be set to 1 instead of the standard value of 0. The behavior does not strictly follow the standard and we recommend using the Standby Set Test Bit parameter instead of this parameter if it is possible. | - | False |
| Standby Set Test Bit | If True, after changing the status of the D2000 Server process (the D2000 KOM process is connected to) from Hot to Standby state (in a redundant system), the Test bit will be set in Cause Of Transmission. | - | False |
| Standby Write Values | If True, after changing the status of the D2000 Server process (the D2000 KOM process is connected to) from Hot to Standby state (in a redundant system), the server will send new values to clients. | - | False |
| W | The number of received I-frames, after which the D2000 KOM process sends an S-frame confirmation. According to the standard, the default value is 8. The relation W < K must be true, the standard recommends W = 2/3 * K. | - | 8 |
| Wait Timeout T1 | Timeout for receiving the confirmation of a sent I-frame (either confirmation within the I-frame or the S-frame itself) or a U-frame. If the D2000 KOM process does not receive the confirmation within Wait Timeout T1 time, it closes the TCP connection. According to the standard, the Wait Timeout T1 default value is 15000 ms | ms | 15 000 |
| Wait Timeout T2 | Timeout for sending the confirmation of a received I-frame. Wait Timeout T2 < Wait Timeout T1. If another I-frame (which confirms the received I-frame) is not sent within Wait Timeout T2 time since the I-frame was received, the D2000 KOM process sends an S-frame confirming the received I-frame to the partner. According to the standard, the Wait Timeout T2 default value is 10000 ms. | ms | 10 000 |
| Wait Timeout T3 | Timeout for sending test frames ( TEST ACT U-frame). If no data are sent in any direction for a long time, a TEST ACT U-frame will be sent after the expiration of the Wait Timeout T3 time by the D2000 KOM process, and a TEST CON U-frame is expected (within Wait Timeout T1 time after sending). If the Wait Timeout T3 on the partner side is set to a lower value, it sends the test frames, and the D2000 KOM process replies to them. According to the standard, the Wait Timeout T2 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 in a control direction (ASDUs 45 - 64). Receiving e.g. S-frame with RSN (Receive Sequence Number) confirming, that the other party received the previous I-frame doesn't mean, that the I-frame was processed. Within the Wait Timeout No answer time interval, the D2000 KOM process waits for receiving the response (e.g. after sending ASDU with TypeIdentificator=45 [Single Command] with CauseOfTransmission=6 [Activation], the receiving of Single Command with CauseOfTransmission=7 [Activation Confirmation] is expected. After the expiration of the Wait Timeout Tn, the D2000 KOM process closes the TCP connection. | ms | 60 000 |