13.7.1. Port & Device

IEC 60870-5-104 device setting shall be entered with the IP address and port number like "". The device setting is displayed at the right-hand-side property view. All the device settings must be correct in order to establish the connection.

IEC 60870-5-104 device properties
Protocol - Cause of Transmission Size

Cause of transmission (COT) size in number of octets. The default value is 2 octets.

Protocol - Common Address

Common address of the ASDU.

Protocol - Interrogate

Interrogate request at the end of initialization.

Protocol - Originator Address

Originator address is used in the second byte of COT. The default value is 0.

Time-out - Time-out

The maximum time allowed to elapse from start of the I/O operation, in milliseconds.