====== IEC 60870-5-104 Server ======

===== Description =====

Mervis RT includes the functionality of an IEC 60870-5-104 server to provide data access to third parties.

==== Interface in PLC ====

  * Ethernet

===== Limitations and Notes =====

**Important**: For the IEC 60870-5-104 protocol to function, Mervis RT must be activated with an extended license that includes this protocol.

===== Configuration in Mervis IDE =====

As with other protocols, using the IEC 60870-5-104 protocol requires defining a server channel of the appropriate type at the PLC level.

{{:en:mervis-ide:35-help:iec104_channel.png?direct|}}

One or more devices can be defined on the channel, differing in the set Common Address (ASDU) and TCP port.

===== Server Communication Channel =====

  * **Enable** - True/False
  * **Link Protocol** - TCP only

**IEC 60870-5-104 Protocol Parameters**

  * **Maximum Number of Unacknowledged APDU (K-value)**
  * **Maximum Number of Unacknowledged APDU (W-value)**
  * **Timeout of Acknowledgement (t1)** - time interval
  * **Timeout of Acknowledgement via S-frame (t2)** - time interval
  * **Timeout of Test Frame (t3)** - time interval
  * **Check Maximum Delay of Control Commands** - True/False
  * **Maximum Delay of Control Commands** - time interval
  * **Remap Types for Interrogation** - True/False
    * During initial interrogation, data types with time stamps will be replaced with data types without time stamps.

===== Device =====

Device properties include parameters for connecting clients to the server:

  * **Enable** - True/False

**TCP Parameters**
    * **IP Address**
      * The address of the network interface on which the server should listen. Currently, only the value 0.0.0.0 for all interfaces is supported.
    * **Port** - The TCP port on which the server listens. Default value **2404**

**IEC 60870-5-104 Protocol Parameters**
    * **Common Address (ASDU)**

===== Data Point =====

**IEC 60870-5-104 Data Point Parameters**
  * **Identification Object Address**
  * **Identification Object Type**
  * **Mapped Variable**

===== Supported Data Types =====

^ M_SP_NA_1  [1] | Single point information |
^ M_SP_TA_1  [2] | Single point information with time tag |
^ M_DP_NA_1  [3] | Double point information |
^ M_DP_TA_1  [4] | Double point information with time tag |
^ M_ST_NA_1  [5] | Step position information |
^ M_ST_TA_1  [6] | Step position information with time tag |
^ M_BO_NA_1  [7] | Bitstring of 32 bits |
^ M_BO_TA_1  [8] | Bitstring of 32 bits with time tag |
^ M_ME_NA_1  [9] | Measured normalized value |
^ M_ME_TA_1 [10] | Measured normalized value with time tag |
^ M_ME_NB_1 [11] | Measured scaled value |
^ M_ME_TB_1 [12] | Measured scaled value with time tag |
^ M_ME_NC_1 [13] | Measured short floating point value |
^ M_ME_TC_1 [14] | Measured short floating point value with time tag |
^ M_ME_ND_1 [21] | Measured normalized value without quality descriptor |
^ M_SP_TB_1 [30] | Single point information with CP56Time2a time tag |
^ M_DP_TB_1 [31] | Double point information with CP56Time2a time tag |
^ M_ST_TB_1 [32] | Step position information with CP56Time2a time tag |
^ M_BO_TB_1 [33] | Bitstring of 32 bits with CP56Time2a time tag |
^ M_ME_TD_1 [34] | Measured normalized value with CP56Time2a time tag |
^ M_ME_TE_1 [35] | Measured scaled value with CP56Time2a time tag |
^ M_ME_TF_1 [36] | Measured short floating point value with CP56Time2a time tag |
^ C_SC_NA_1 [45] | Single command |
^ C_DC_NA_1 [46] | Double command |
^ C_RC_NA_1 [47] | Regulating step command |
^ C_SE_NA_1 [48] | Set-point command, normalised value |
^ C_SE_NB_1 [49] | Set-point command, scaled value |
^ C_SE_NC_1 [50] | Set-point command, short floating point value |
^ C_BO_NA_1 [51] | Bitstring command, 32 bits |
^ C_SC_TA_1 [58] | Single command with CP56Time2a time tag |
^ C_DC_TA_1 [59] | Double command with CP56Time2a time tag |
^ C_RC_TA_1 [60] | Regulating step command with CP56Time2a time tag |
^ C_SE_TA_1 [61] | Set-point command, normalised value with CP56Time2a time tag |
^ C_SE_TB_1 [62] | Set-point command, scaled value with CP56Time2a time tag |
^ C_SE_TC_1 [63] | Set-point command, short floating point value with CP56Time2a time tag |
^ C_BO_TA_1 [64] | Bitstring command, 32 bits with CP56Time2a time tag |